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Kona Unit X

Kona Unit X
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Details

The Unit X has become a cult favorite among die-hard Kona fans. Maybe it's the Cromoly frame. Maybe it's the fact that it's a bike packing monster, or its well-geared 12-speed drivetrain, or modular dropouts which give you the ability to run it as a single speed if that's your thing. Maybe it's because the rigid fork makes it that much more of a classic. We may never know why the Unit X is such a popular bike, but we can only guess it's because it is one of the most practical machines in our lineup.

REYNOLDS 520 CROMOLY
Reynolds 520 tubes are mandrel-butted for accurate profiles and available in a wide range of shapes. Weight savings from butting provides competitively priced, light framesets that are noticeably compliant on the road or the trail, and are guaranteed to last a lifetime.

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.

44mm HEAD TUBE
44mm headtubes are a versatile spec which works with both straight and tapered steerers by switching out the lower headset cup. The stock configuration is internal and is for 1 1/8" steerer. Switching to an external lower cup allows for the use of a tapered 1.5" steerer. The best of both worlds.

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.

Geometry

Geometry Chart:
Frame SizeSmallMediumLargeX-Large
Seat Tube Length (mm) 370 420 470 530
Top Tube Length (mm) 582 610 637 675
Reach (mm) 425 450 475 510
Stack (mm) 588 597 606 615
Standover (mm) 695 731 768 810
Head Tube Angle (degrees) 68 68 68 68
Head Tube Length (mm) 110 120 130 140
Seat Tube Angle (degrees) 75 75 75 75
Chainstay Length (mm) 430 430 430 430
Bottom Bracket Drop (mm) 65 65 65 65
Bottom Bracket Height (mm) 310 310 310 310
Wheelbase (mm) 1115 1144 1173 1211
Front Center (mm) 693 722 750 789
Fork Length (mm) 470 470 470 470
Fork Offset (mm) 50 50 50 50
Sizes:
Frame SizeHeight (inches)Height (cm)Inseam (inches)Inseam (cm)
X-Small 4'10"-5'1" 147-155cm 24"-27" 61-69cm
Small 5'0"-5'3" 152-160cm 26"-29" 66-74cm
Small, Medium 5'2"-5'7" 157-170cm 27"-30" 69-76cm
Medium 5'6"-5'10" 168-178cm 29"-31" 74-79cm
Medium, Large 5'9"-6'0" 175-183cm 30"-33" 76-84cm
Large, X-Large 5'11"-6'2" 180-188cm 32"-35" 81-89cm
Large, X-Large 6'1"-6'5" 185-196cm 33"-36" 84-91cm

Specs

Frame Reynolds 520 Butted Cromoly
Fork Kona Plus fork 110mm spacing
Rims WTB ST i30 2.0 TCS
Hubs Front: Shimano 110x15mm
Rear: Shimano 148x12mm
Spokes Stainless Black 14g
Tires WTB Ranger TCS 29 x 2.6"
Bottom Bracket Shimano 73mm
Crankset Shimano Deore 12spd
Chainrings 32t
Shifters Shimano Deore 12spd
Rear Derailleur Shimano Deore
Cassette/Freewheel Shimano Deore 10-51t 12spd
Chain Shimano Deore 12spd
Rotors Front: Shimano RT10 180mm (centerlock)
Rear: Shimano RT10 160mm (centerlock)
Brake Levers Shimano MT410 Hydraulic
Handlebars Kona XC/BC Riser
Tape/Grips Kona Key Grip
Stem Kona XC/BC
Headset TH ZST No.10
Seatpost Kona Thumb w/Offset 31.6mm
Saddle WTB Volt
Pedals Sold separately

* Subject to change without notice.