Mountain Frames

So here it is. The Rhythm is back. Only this time it moves to your beat. The NEW Rhythm is a 26” wheel aluminium JUMP/PUMP/4X/PLAY bike frame, built for big airs, endless laps, and elbow to elbow antics. - 26" wheeled aluminum JUMP/PUMP/4X/PLAY frame built for big airs, endless laps, and elbow to elbow antics - 6061 T6 aluminum alloy frameset - Two lengths available - Interchangeable dropouts: 12x142mm geared or 135x10mm single speed (DROPOUTS NOT INCLUDED WITH FRAME) - Sliding dropout system for chain tensioning and adjusting chainstay length - Compatible with 100-140mm forks - Fits tires up to 26x2.5" - PM 160mm disc brake mounts - 34.9mm seat clamp and additional stickers included

The foundation for the Alcatraz build of your dreams. The Series 3 aluminum frame is built for the hard knocks and is stiff enough for lightning-fast acceleration and tough enough for the heavy hits. Short stays keep manuals easy and ambidextrous cable routing means you can run your brake on the left or right of the bars. The Main Alcatraz frame kit comes supplied with an FSA headset, Marin chain tension device and Marin seat clamp. Available in two frame sizes, regular and long.

Developed in conjunction with freeride legend Matt Jones and taking its name from the most rough and tumble piece of Marin County, the San Quentin collection lives up to the notoriety of the namesake maximum security California State Prison. Blending the strength and style of our Alcatraz dirt jump frame with the natural trail savvy of the best hardtails, the San Quentin family of aggressive trail hardtails is the perfect mash-up for the modern trail rider. The Marin San Quentin shreds the boundaries of the mountain bike genres - doing it all with a huge splash of big air, speed, and style. Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of our dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail. Pedal all day in the hills, send it at the dirt jumps, carve the skatepark, go big in the bike park - it's all good on the San Quentin. The Marin San Quentin Frameset is supplied with a headset, seat clamp, and Marin rubber grommet kit For internal cable routing.

The San Quentin is for the aggressive hardtail trail rider looking for a blend between singletrack capabilities and extended air time. Developed in conjunction with freeride legend Matt Jones and taking its name from the most rough and tumble piece of Marin County, the San Quentin collection lives up to the notoriety of the namesake maximum security California State Prison. Blending the strength and style of our Alcatraz dirt jump frame with the natural trail savvy of the best hardtails, the San Quentin family of aggressive trail hardtails is the perfect mash-up for the modern trail rider.

The version 2.0 of the Riff offers practical updates in features and geometry without going all-in with progressive geometry that almost everyone in chasing. We wanted to keep this frame a hardtail that's great for bike packing and familiar-feeling on long days in the saddle on rolling terrain. There is a slightly steeper seat angle for more efficient climbing and shorter seat tubes to benefit dropper posts. Tough Broski Sliding Dropouts allow you to run single-speed, geared or even hub gears. Rear hub spacing in updated to Boost 148 . A modified chainstay allows fitting even some double cranks with “plus size” 2.8? wide. - ED coating inside frame and under the paint increase rust resistance - Boost 148mm rear hub spacing - Geometry is optimized for 120mm forks. Will work well with a 100mm fork, too. - Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end - ISO disc brake tabs - IRD Broski Sliding Dropouts - S-bend seat stays and chainstays - Rear rack and fender eyelets - Dropper post cable routing runs on downtube and inside the seat tube - 34.9mm seat collar(not included), 400mm post recommended - CNC-machined 44mm headtube: Will fit 1-1/8" steerers with a ZeroStack 44 headset or fit tapered steerers with a ZS44 upper assembly and external cup (EC44) lower assembly - Recommended tire size: 27.5 x 1.95" ‚Äi 2.8" - Only the Large size frame comes with bottle mounts on the seat tube - 5.7 lbs (XS)

The cult favorite continues. The Honzo ST frame is the bike you'll find under a messenger, under that old-school soul ripper, or under the rider who really wants to build something beautiful and custom. A 66-degree headtube is ideal for all kinds of tricky, steep terrain, and the short seat tube allows for longer dropper posts. As always, the Honzo ST frame features adjustable dropouts so you can run your favorite drivetrain without any issues. FEATURES KONA CROMOLY: Very few materials offer as much shock absorption, durability, and supple-ride characteristics as steel. We've never strayed from cycling's original material and have worked tirelessly to adapt, refine and innovate Kona Cromoly framesets as rider demands continue to evolve. INTERNAL HEADSET: Bearing cups are actually pressed into the frame and are easily removable. An internal headset also reduces stack height, so the height of the stem and bars are more adjustable, giving the rider the best fit possible. TAPERED HEAD TUBE: More girth at the bottom of the head tube better distributes shock force, prolonging the bearing life of the headset itself and eliminating brake shudder, while providing confident steering performance. The inherent strength of its triangular design also means a stronger steering position and improved balance, giving the rider more control in rough terrain. A zero-stack, tapered head tube also puts strength where the load is going—into the lower headset cup—maximizing bearing durability where it's needed. TUBELESS COMPATIBLE RIMS: Tubeless rims allow for tires with more puncture resistance; the ability to run lower tire pressure, which provides better tire grip on the trail; lower rolling resistance; and weight savings over traditional tube and tire systems. 12x148mm AXLE: 12x142mm, 12x148 and 12x157 rear axle standards provide two major advantages to the Kona rider: the 12mm diameter of the rear axle provides the rear hub and frame with a stiff interface, while the 142/148/157mm outer diameter of the hub allows the wheel to be quickly and properly positioned in the frame before the rear axle is inserted.

The El Roy is the ultimate aggressive steel hardtail that’ll get you to the top, and then really shine on the way down, with a spicy mix of progressive geometry and supple steel. The classic robust yet forgiving character of chromoly steel meets modern-day long and slack geometry, a match as perfect as mountain biking and post-ride burritos. This new 29" wheel trail slayer was purpose-built for silly fun days in the woods, no matter the conditions. Use it as a back-to-the-roots, all-in-one trail slayer, or as that perfect "n+1 bike," on days when the full suspension bike stays at home in the shed. Named in honor of our favorite post-ride taqueria, the El Roy is overflowing in solid spec choices, all wrapped up with a stout Series 3 double-butted and formed CrMo frameset. Grab one of two frame sizes, Regular or Grande, and enjoy the delicious goodness that we've cooked up. TECHNOLOGY: SERIES 3 CRMO FRAME The El Roy is built on a stout Series 3 4130 CrMo frame with investment cast dropouts, integrated drop-in headset, external brake and hose mounts, all fully ED coated for longevity. GEOMETRY Gravity-oriented geometry, with a 63° headtube and 78° seattube angles, 44mm fork offset, and long reach measurements (Regular = 480mm, Grande = 510mm). TWO SIZES Regular and Grande frame sizes fit a wide range of riders, with included 150mm (Regular) or 170mm (Grande) dropper posts. INVESTMENT CAST DROPOUTS Custom investment cast CrMo 148x12mm Boost thru-axle drop outs provide strength and stiffness where you need it most. TOPTUBE STORAGE MOUNTS Bosses on the underside of the top tube give the rider the option to mount tools and other accessories in a tidy and secure fashion.

Timberjack is Salsa's aggressive trail hardtail. Its progressive trail geometry is stable on descents and technical sections, while the Alternator 2.0 dropouts allow for adjustable chainstay length to dial in ride characteristics. Ample accessory mounts and dual wheel size compatibility add more versatility to the package, making Timberjack a well-rounded ripper that likes to party.

As a highly versatile touring bike, the Bridge Club hits the sweet spot that separates on- and off-road excursions. The simplistic design makes it fully adept to handle a full rack and pannier setup, frame bags, or any combination of the two. It doesn’t feel sluggish on paved shortcuts, but can also hold its own on dirt detours. If you’re feeling a little zesty on your next road tour, you won’t be ill-prepared for reroutes through the woods. The Bridge Club is designed to handle it all. - 100% Surly Chromoly frame, main triangle is double-butted; 1-1/8" threadless Chromoly fork - Rack, fender, and four sets of three-pack mounts - Disc brake-specific, single-position vertical rear dropout makes it less intimidating than other bikes in the category - Clearance for 700 x 47mm (with or without fenders) or 27.5 x 2.8" tires (27.5 x 2.6" with fenders)

The All-Around Fat Bike Wednesday sits in the middle of our Trail category, but don't let that fool you into thinking that's its only use. With Wednesday, we borrowed elements from some of our Trail and Touring models to create a versatile fat tire trail bike that can truly handle anything you want to attempt. If you do an equal amount of off-road touring as you do hitting trails, Wednesday's ability to play both parts equally will suit you well. Or, if you're looking for a fat bike and don't need the fattest tires on the market, Wednesday's 26 x 4.6" tire clearance is just the ticket. "Any day of the week's a great day to ride a Wednesday." - Modern mountain standards: stealth dropper post routing, 44mm headtube, suspension correction, front and rear thru-axles - Full suite of useful braze-ons: front and rear racks, multiple sets of three-pack mounts, fenders - Full-forward, short chainstay position: 26 x 3.8" tires on 80mm rims; full-rearward, longer chainstay position: 26 x 4.6" tires on an 80mm rim Specs: - Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout - Rear Hub Spacing: 12 x 177mm (Surly axle included); 10 x 170mm with Surly 10/12 Adapter Washers (not included) - Front Hub Spacing: 15 x 150mm (Surly axle included) - Rear Brake: Disc - 51mm I.S. (203mm max rotor) - Front Brake: Disc - 51mm I.S. (203mm max rotor) - Head Tube: Ø44mm - Steerer Tube: Ø28.6mm (1-1/8") - Crown Race: Ø30mm (1-1/8") - Stock Headset Upper (S.H.I.S.): ZS44/28.6 - Stock Headset Lower (S.H.I.S.): EC44/30 - Front Derailleur (Clamp): High direct mount top-pull (Ø34.9mm) - Max Chainring (CL): 1x (Fat bike 170): 34T; 2x (Fat bike 170): 26/38T; 2x (Surly OD): 22/36T - Tire Clearance Frame: 26 x 4.3" (rear axle position); 26 x 3.8" (front axle position); 29 x 3.0" - Tire Clearance Fork: 26 x 5.25"; 29 x 3.0" - Rigid Fork Spec: 468 x 47mm - Max Suspension Fork Length: 511 x 51mm (Fatbike 100mm) - Bottle Mounts Frame: 2 Standard (XS - M); 3 Standard (L - XL) - Bottle Mounts Fork: 2 Three-Pack - Rack Mounts Frame: Yes (upper and lower threaded) - Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded) - Fender Mounts Frame: Yes - Other Features: Internal dropper post routing compatible

The All-Around Fat Bike Wednesday sits in the middle of our Trail category, but don’t let that fool you into thinking that’s its only use. With Wednesday, we borrowed elements from some of our Trail and Touring models to create a versatile fat tire trail bike that can truly handle anything you want to attempt. If you do an equal amount of off-road touring as you do hitting trails, Wednesday’s ability to play both parts equally will suit you well. Or, if you’re looking for a fat bike and don’t need the fattest tires on the market, Wednesday’s 26 x 4.6” tire clearance is just the ticket. "Any day of the week’s a great day to ride a Wednesday." - Modern mountain standards: stealth dropper post routing, 44mm headtube, suspension correction, front and rear thru-axles - Full suite of useful braze-ons: front and rear racks, multiple sets of three-pack mounts, fenders - Full-forward, short chainstay position: 26 x 3.8? tires on 80mm rims; full-rearward, longer chainstay position: 26 x 4.6? tires on an 80mm rim

Ice Cream Truck solves the problem of having to choose between a fat bike and a trail bike. It boasts a symmetric 190mm-spaced Chromoly frame, suspension-corrected 150mm-spaced fork, and sporty trail-oriented geometry. Supported by massive 4.8-inch tires, it's ready to deftly tackle nearly any terrain. - 100% Surly Chromoly steel with 44mm headtube and internal dropper post cable routing - Frame is E.D. Coated for increased life expectancy - 1-1/8-inch straight steerer fork, Chromoly steel - 100mm threaded bottom bracket shell - Front and rear thru-axles, non-offset

Ice Cream Truck solves the problem of having to choose between a fat bike and a trail bike. It boasts a symmetric 190mm-spaced Chromoly frame, suspension-corrected 150mm-spaced fork, and sporty trail-oriented geometry. Supported by massive 4.8" tires, itis ready to deftly tackle nearly any terrain. - 100% Surly Chromoly steel with 44mm headtube and internal dropper post cable routing - Frame is E.D. Coated for increased life expectancy - 1-1/8" straight steerer fork, Chromoly steel - 100mm threaded bottom bracket shell - Front and rear thru-axles, non-off-set - Universal cast dropouts accommodate thru-axle or quick-release standards

Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out. Your BMX Bike All Grown Up Lowside is like the grownup version of the bike you rode when you were a kid and still had hopes and dreams and some semblance of ambition. It's just as happy riding singletrack as it is parked outside your favorite drinking establishment. Lowside is a single speed mountain bike. Singlespeeding has been a part of Surly's DNA since day one when we launched the 1x1 Rat Ride. After a lot of Homie Fall Fests and more feats of strength than we can recall, we decided to discontinue it a couple years back. Lowside picks up right where the 1x1 left off. "Some have dubbed the Lowside the ultimate pub cruiser." - Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles - Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though) - Spec'd in alternating years with 26 x 3" or 27.5 x 2.8" tires, the Lowside remains capable of running either option

The Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out. It’s the bike you turn to when you’re not entirely sure what the night has in store. It’s the bike to grab when you want to have just much fun riding to the trail as you do from the trail itself. Singlespeeding is an integral part of Surly’s DNA, and the Lowside continues the tradition, by taking a simpler approach to trail riding. - 100% Surly 4130 Chromoly frame, main triangle is double-butted; 1-1/8" threadless Chromoly fork - Singlespeed “specific” (derailleur hanger but no Trip Guides) - Dropper post routing - Gnot-Boost rear spacing - Front and rear thru-axle - 26 x 3” or 27.5 x 2.8” tire clearance

The Ogre can get you to your job during the week, then way out of town on the weekend. It’s not sluggish on pavement or gravel and can also hold its own on singletrack. Ogre brings several sensible features to the 29er platform, including horizontal slotted dropouts with Gnot-Boost spacing, a tweaked non-suspension corrected geometry, and a beefy tire clearance. - 100% Surly Chromoly steel, double-butted main triangle - TIG-welded, Horizontal slotted with derailleur hanger, Gnot-Boost spacing allows the use of 135mm QR hub, 142 x 12mm thru-axle or 148 x 12mm Boost hubs. Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts - Full-length Surly Trip Guide housing line guides for derailleurs and brakes; two sets of bottle cage mounts; upper seatstay threaded barrels, mid- and low-blade fully threaded through-blade fork eyelets; threaded holes for racks, fenders and trailer mounting nuts; Rohloff OEM2 axle plate mounting slot - Disc brakes only. Disc mounts are 51mm IS. Note: rear disc brake is limited to 160mm maximum rotor diameter and requires the use of Surly caliper adaptor (included with frames and bikes) - Frame is E.D. coated for increased life expectancy - Tire clearance for 29 x 2.5" or 27.5 x 3"

If there’s one thing Tom knows, it’s dirt. When he first designed the Ultra he knew it would appeal to riders who demand specific ride characteristics and dirt slaying only he could deliver- and that was in the 1980s! Good design withstands the test of time, and the latest iteration of the Ultra is a prime example. Like its predecessor from 30 years prior, the new Ultra occupies a unique ride space from cross-country riders looking to get rowdy and go big to enduro riders lusting for some all-mountain shredding. Designed around a 120mm travel fork and super stable Boost 148 spacing, most of the fun is in the wheels. Designed to accommodate 29" or 27.5" wheels, the Ultra is highly versatile. Throw on some 29s for some trail-smashing XC riding, or saddle up some 27.5+ for some serious no-holds-barred shredding. The Ultra is a rough and rugged trail master that doesn’t know when to quit. - Compatible with 27.5 x 2.8 and 29 x 2.4 tires - Internal routing for a dropper post - Boost 148x12 rear spacing

Karate Monkey is a highly versatile trail bike that plays the part of 29er and 27.5+ equally well. Karate Monkey delivers a resilient, lively ride on all sorts of gnarly terrain. Its frame is a highly-versatile canvas for whatever dirty masterpiece your brain cooks up. According to our computing machine (Thor) it can be set up in approximately 487 different configurations. Originally designed as a 29er (and the frame that helped spark the 29" wheel movement), the latest Karate Monkey is designed to perform just as admirably as a 27.5+ rig as well. This allows you to pick your poison — provided your poison is having a really great time while permanently donning a huge grin, of course. - Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension corrected fork - Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though) - Clearance for 29" x 2.5" or 27.5" x 3" tires

The Karate Monkey frame features updated, progressive trail geometry, a new tubeset, and Surly’s Gnot-Boost rear dropout system to support multiple drivetrain and wheel size configurations. - 100% Surly 4130 chromoly steel frame and fork; double-butted main triangle and 44mm headtube - Tubeset uses the same trumpet tubes found on Instigator 2.0 frame - Adjustable rear dropouts with 145mm Gnot-Boost spacing works with 142 x 12, 148 x 12mm, and 135mm w/ 10/12 washer - Internal dropper seatpost routing - 30.9mm seat tube ID - Clearance for 29 x 2.55 or 27.5 x 3 tires

The Karate Monkey features updated, progressive trail geometry, our custom trumpet tubeset, and Surly's Gnot-Boost rear dropout system. Available in a variety of colors, with multiple drivetrain and wheel size configurations.

The Karate Monkey features updated, progressive trail geometry, our custom trumpet tubeset and Surly’s Gnot-Boost rear dropout system. Available in a variety of colors, with multiple drivetrain and wheel size configurations. - 100% Surly Chromoly steel frame and fork; double-butted main triangle and 44mm headtube - The tubeset uses the same trumpet tubes found on Instigator 2.0 frame - Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142, 148 12mm thru, as well as 135mm w/ 10/12 washer - Internal dropper seatpost routing with 30.9mm seat tube ID - Clearance for 29 x 2.55 or 27.5 x 3 tires

As the first "plus" bike to hit the market, Krampus changed the way many people approach trail riding. It's shown people the light of how high-volume, large-diameter tires can vastly improve the ride experience. It's also done a bang-up job dispelling the myth that big tires make you slow. Krampus is kind of like the opposite of a mullet: long in the front and short in the rear. With a long toptube and compact chainstays, it takes trail-shredding abilities to the next level. A mullet may be business in the front, party in the back but Krampus makes partying its business. - Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension-corrected fork - Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though) - Clearance for 29 x 3" tires

As the first "plus" bike to hit the market, Krampus changed the way many people approach trail riding. It's shown people the light of how high-volume, large-diameter tires can vastly improve the ride experience. It's also done a bang-up job dispelling the myth that big tires make you slow. Krampus is kind of like the opposite of a mullet: long in the front and short in the rear. With a long toptube and compact chainstays, it takes trail-shredding abilities to the next level. A mullet may be business in the front, party in the back but Krampus makes partying its business. - Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension-corrected fork - Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though) - Clearance for 29 x 3" tires

The Krampus is the bike that started it all — the plus-size movement that is. Krampus features Surly’s Gnot-Boost rear hub spacing of 145mm; compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle and 135mm quick-release hubs. - 100% Surly 4130 CroMoly steel frame and fork; double-butted main triangle and 44mm headtube - New tube-set uses the same trumpet tubes found on 2017 Karate Monkey frame - Gnot-Boost adjustable rear dropouts - Internal dropper seatpost routing - 30.9mm seat tube - Designed to fit up to 29 x 3.0” tires

The all-new Alpine Trail series is our boldest and most capable line of enduro bikes ever, built upon our most advanced, most adjustable frames to date. Series 4 aluminum MultiTrac 2 LT frames feature mixed 29"/27.5" wheels, 170mm front and 160mm rear travel, and the utmost in adjustability. Riders can alter the head tube angle and bottom bracket/chainstay length, as well as run 29" rear wheels if desired. "Bear Box" downtube storage includes a zippered nylon bag to house trail essentials, and a 34.9mm seatpost increases strength and is compatible with the latest dropper posts. The Alpine Trail XR frame kit gives the rider the chassis to create the Alpine Trail that best meets their needs. All the essentials are included, from the rear shock to the headset, the rear axle and seattube collar. You bring your creativity and components to create the raddest bike on the trail.

Designed to go where no normal fat bike can, the Surly Moonlander is for riders who want otherworldly capabilities on rocky shorelines, sand, snow, and desolate landscapes not yet discovered. It’s the ultimate choice for explorers who itch for the next great adventure, and aren’t afraid of what they might find. - Constructed from 100% Surly Chromoly Steel for excellent durability - Clearance for 24 x 6.25” tires, as well as 26 x 5.1", 27.5 x 4.8", and 29 x 3" - Comes with rack and fender mounts, as well as accessory mounts on both fork blades to enhance cargo capacity - Four frame sizes to fit most riders: SM, MD, LG, XL

The Blackthorn C frame blends a stiff carbon fiber chassis with our progressive trail geometry and Split Pivot suspension design. The result is a well-balanced platform for an all-mountain bike that descends with gusto, rails through features, and makes climbing up for lap two as painless as possible. The Fox Float X Factory shock delivers 140 mm of travel to guide you through whatever the trail serves up. On-bike cargo features hold your tube, pump, and repair kit, and more on the frame to lighten up your hip pack—or allow you to ride pack-free. We made Blackthorn C the best all-mountain bike frame around. Take it and make it your dream bike.

Big adventures require a bike that can rise to the occasion. Arctodus is named after Arctodus simus, an Ice Age behemoth that was the largest bear to ever walk the Earth. Like its namesake, Arctodus the bike is versatile, strong, and ready to explore. It has adjustable geometry, a durable steel frame, a massive front triangle for a frame bag, lots of cargo mounts, and can clear the biggest fat bike tires on the market. Arctodus is ready for afternoon exploration, polar expeditions, and everything in between. THE BIGGEST TIRE CLEARANCE Arctodus was built around a 26" x 4.8" tire for optimal handling and control on loose trails. It can fit the biggest fat bike tires in the world. The biggest fat tire on the market is 26" x 5.05" and Arctodus eats them like a snack with room to spare. Same as 27.5" x 4.5", which is the biggest 27.5" tire available. Arctodus is the only bike to clear tires this big with a 12-speed drivetrain without chain interference. When a bike is created for big rides with fresh snow, it needs to fit tires that were designed for the same reason. This is a bike that prays for snow and cuts its own trail. ONE BIKE, THREE WHEELBASE LENGTHS A key feature in all Otso bikes is adjustable geometry and the ability to adapt the bike for the ride ahead. The patented Tuning Chip rear dropout system can change wheelbase length by up to 20mm, raise or lower the bottom bracket height by up to 4mm, and change the head tube angle by +/.5º. Use the rear position when the trails are loose and you need as much control as you can get. Use the front position when the snow is firm and the trails let you take turns with a little speed. No matter the conditions, Arctodus has an answer. DESIGNED FOR EXPLORING There's no need to wait for the trail groomer. Arctodus was made for foot trails, forest paths, and snow-covered frozen lakes. The bombproof steel frame can withstand the demands of an expedition. A large front triangle can fit a healthy full-frame bag. The carbon fork has mounts on either side for cargo. A rear frame can be attached via mounts on the seat stays and Tuning Chip hardware. Even the geometry is catered for exploration, with extra trail for optimal flotation and bottom bracket height that will ride above deeper snow. Whether you're exploring local trails or a national forest, you can trust Arctodus to keep you riding. NARROW Q FACTOR Arctodus has a 100mm bottom bracket. This is 30-40mm narrower than other fat bikes that have the same tire clearance. Ride with massive tires without compromising handling. SUSPENSION CORRECT All Otso frames feature suspension-corrected geometry. Arctodus is compatible with suspension forks that have up to 120mm of travel. A few options are available on the Custom Bike Builder. STABILITY & FLOTATION Arctodus geometry was designed for optimal riding on fresh trails. The 68º head tube angle paired with massive tires gives Arctodus more trail than other fat bikes. Even the BB height was selected for clearance in deep snow. DROPPER COMPATIBLE Snowy trails are good with dropper posts, too. A port near the bottom bracket fits a cable and housing for a cable-actuated dropper post."

Big adventures require a bike that can rise to the occasion. Arctodus is named after Arctodus simus, an Ice Age behemoth that was the largest bear to ever walk the Earth. Like its namesake, Arctodus the bike is versatile, strong, and ready to explore. It has adjustable geometry, a durable steel frame, a massive front triangle for a frame bag, lots of cargo mounts, and can clear the biggest fat bike tires on the market. Arctodus is ready for afternoon exploration, polar expeditions, and everything in between. THE BIGGEST TIRE CLEARANCE Arctodus was built around a 26" x 4.8" tire for optimal handling and control on loose trails. It can fit the biggest fat bike tires in the world. The biggest fat tire on the market is 26" x 5.05" and Arctodus eats them like a snack with room to spare. Same as 27.5" x 4.5", which is the biggest 27.5" tire available. Arctodus is the only bike to clear tires this big with a 12-speed drivetrain without chain interference. When a bike is created for big rides with fresh snow, it needs to fit tires that were designed for the same reason. This is a bike that prays for snow and cuts its own trail. ONE BIKE, THREE WHEELBASE LENGTHS A key feature in all Otso bikes is adjustable geometry and the ability to adapt the bike for the ride ahead. The patented Tuning Chip rear dropout system can change wheelbase length by up to 20mm, raise or lower the bottom bracket height by up to 4mm, and change the head tube angle by +/.5º. Use the rear position when the trails are loose and you need as much control as you can get. Use the front position when the snow is firm and the trails let you take turns with a little speed. No matter the conditions, Arctodus has an answer. DESIGNED FOR EXPLORING There's no need to wait for the trail groomer. Arctodus was made for foot trails, forest paths, and snow-covered frozen lakes. The bombproof steel frame can withstand the demands of an expedition. A large front triangle can fit a healthy full-frame bag. The carbon fork has mounts on either side for cargo. A rear frame can be attached via mounts on the seat stays and Tuning Chip hardware. Even the geometry is catered for exploration, with extra trail for optimal flotation and bottom bracket height that will ride above deeper snow. Whether you're exploring local trails or a national forest, you can trust Arctodus to keep you riding. NARROW Q FACTOR Arctodus has a 100mm bottom bracket. This is 30-40mm narrower than other fat bikes that have the same tire clearance. Ride with massive tires without compromising handling. SUSPENSION CORRECT All Otso frames feature suspension-corrected geometry. Arctodus is compatible with suspension forks that have up to 120mm of travel. A few options are available on the Custom Bike Builder. STABILITY & FLOATATION Arctodus geometry was designed for optimal riding on fresh trails. The 68º head tube angle paired with massive tires gives Arctodus more trail than other fat bikes. Even the BB height was selected for clearance in deep snow. DROPPER COMPATIBLE Snowy trails are good with dropper posts, too. A port near the bottom bracket fits a cable and housing for a cable-actuated dropper post.

Big mountains, epic passes, and all-day ripping descents. If you live for the alpine adventure and gravity-fueled downhills, look no further than the Alpine Trail series. Updated for 2021, the Alpine Trail is built around the longest travel version of our critically acclaimed MultiTrac platform with progressive slack headtube/steep seattube geometry, low-slung aluminum frames, and 29" wheels. The Alpine Trail is here to conquer all singletrack in its path. Unidirectional Carbon Fiber Frame - Alpine Trail Carbon 1 and 2 models feature high modulus carbon fiber and monocoque construction to deliver the strongest and stiffest Alpine Trail to date. Modern Geometry - The Alpine Trail is at the cutting edge of aggressive enduro geometry, bringing you the best long travel bike for the job. A 63.5° headtube angle, 78° seat tube angle, short 430mm chainstays, and a long front center unlock the trail for pure long travel bliss. Functional Long Travel - The Alpine Trail was built to give riders long travel with no sacrifice in pedaling efficiency, providing a bike that will outshine the competition on the climb and still allow you to hold it wide open on the descents.