Marin Donky JR 20" SE (2023) Silver


The Donky Jr. family of bikes are designed with young riders in mind.

The Donky Jr. family consists of lightweight aluminum-frame bikes for kids. All models feature freewheels and handbrakes, making it easier for them to transition to larger bikes as they grow. 

Why you'll love it:

The Donky Jr. 20" is built around a lightweight aluminum alloy frame and stout steel fork, but with the addition of a dependable and smooth-shifting Shimano 6-speed drivetrain - perfect for a growing rider who is able to get out for the ride to school, to the park or out on your first proper trails.

Sizing & Fit

This 20" Child's Bike generally fits a rider 3'7"-4'3", but there are some other factors, like arm and leg length that determines a great fit.

The best way to find your perfect fit is to consult the experts here at Sunshine Bicycle Center.


  • FRAME: Aluminum Donky Jr. 20" Kids Frame 
  • FORK: Steel, Straight Blade, 1 1/8" Steer 
  • RIMS: Marin Double Wall Aluminum, Machined Sidewall 
  • HUBS: Steel, 32H 
  • SPOKES: 14g Stainless Steel
  • TIRES: Marin x Vee Tire Co. Speedster, 20"x2.0" 
  • DERAILLEUR REAR: Shimano Tourney 
  • SHIFT LEVER: Shimano Revo Twist Shift, 6-speed 
  • CRANKSET: 3-Piece Aluminum Crank, 36T Chainring, 140mm Arm Length 
  • BOTTOM BRACKET: Sealed Cartridge Bearing, Square Taper 
  • CHAIN: 6-speed 
  • CASSETTE: Shimano 6-speed, 14/28t 
  • BRAKES: Tektro V-Brake
  • BRAKE LEVERS: Kids Aluminum Brake Levers 
  • HANDLEBAR: Marin Steel MTB 
  • STEM: Marin Alloy 
  • GRIPS: Kids Grips 
  • SEATPOST: Integrated w/ Saddle 
  • SADDLE: Marin Kids w/ Integrated Seat Post 
  • PEDALS: Kids Pedals
  • KICKSTAND: Steel Rear Mount Kickstand 
  • EXTRAS: Rear Derailleur Guard, Marin Oso Cotton Bag