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Marin Donky Jr 20

Marin Donky Jr 20
  • Color: Matte White/Silver
  • Color: Matte Black/Gold
Size: 20-inch
Please select options Unavailable
This is not an item we ship, but it can be purchased online and picked up at your convenience. For more information, please get in touch.


The Donky Jr. 20" is built around a lightweight aluminum alloy frame and stout steel fork, with the addition of a dependable and smooth-shifting Shimano 6-speed drivetrain—perfect for a growing rider who is able to get out on longer rides.

bike frame with labeled dimensions
Bike Sizes:
One Size
A. Reach 295mm
B. Stack 419mm
C. Standover 525mm
D. Effective Top Tube 431mm
E. Head Tube Angle 69°
F. Head Tube Length 95mm
G. Seat Tube Angle 72°
H. Seat Tube Length 280mm
I. Bottom Bracket Height 253mm
K. Fork Rake/Offset 25mm
M. Wheelbase 842mm
O. Chainstay Length 359mm
Handlebar Width 580mm
Stem Length 60mm
Crank Length 140mm


Frame Aluminum, 20" Kids
Fork Steel Straight Blade, 1 1/8" Threadless Steerer Tube
Rims Marin Double Wall Aluminum w/Machined Sidewalls
Hubs Steel, 32H
Spokes Black Stainless Steel 14G Spokes, Brass Nipples
Tires Marin/Vee Tire Speedster, 20 x 2.0"
Bottom Bracket Sealed Cartridge Bearing, Square Taper
Crankset Alloy 3-Piece, 140mm; 36t chainring
Shifters Shimano Revo Twist Shift, 6-Speed
Rear Derailleur Shimano Tourney 6-Speed
Cassette/Freewheel Shimano 6-speed, 14-28t
Chain KMC HV500 6-speed
Brakes Tektro Linear Pull
Brake Levers Tektro Kids Specific Short Reach Alloy
Handlebars Marin Steel MTB
Tape/Grips Kids Specific
Stem Marin Alloy
Headset FSA No. 8B, Threadless, 1 1/8"
Seatpost 27.2mm Steel, Integrated w/ Saddle
Saddle Marin Kids w/ Integrated Seat Post
Pedals Kids Specific Nylon
Accessories & Extras Rear-Mount Steel Kickstand, Rear Derailleur Guard

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Matte Black/Gold / 20-inch 843346112675 732751001 210000035635
Matte White/Silver / 20-inch 843346112682 732752001 210000035637