Specialized Riprock Coaster 20" SPECIALIZED


In stock

Riding a bike is all about freedom, so no kid should ever have to feel inhibited by where they can and can't ride their bike. With the Riprock 20 Coaster, however, your little one will be able to rip and ride on any terrain that they come across—especiall...Read more

Traction, control, confidence, and fun—the Riprock 20 Coaster is the perfect bike for your kid to start hitting the trails with. And with the simple coaster brake design, safety and fun aren't mutually exclusive anymore.

While there are many notable features that make the Riprock awesome, it's the 2.3-inch tires that provide a high degree of, well, shred-ability—delivering exceptional traction, control, and confidence for riding rough, off-road sections and city streets alike. And when you combine the big tires with sturdy 20-inch wheels, an easy-to-use coaster brake that all but eliminates the threat of the dreaded endo, and a single-speed setup, you have the perfect mountain bike to get your little Ripper out on the trail.


  • The A1 premium aluminum frame is lightweight and built to withstand the tough use by kids, while the geometry features an ultra-low standover that makes it easy for your little ones to fit on and grow with the bike.
  • Steel coaster brake is a reliable, easy to use brake perfect for safe stops and awesome skids.
  • 20x2.3" Rhythm Lite tires deliver tons of traction, comfort, stability, and fun over all types of terrain. 
Specialized A1 Premium Aluminum
Hi-Ten steel
Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
Specialized, slip-on
Front Brake
V-brake w/ tool-less reach adjust brake lever
Rear Brake
V-brake w/ tool-less reach adjust brake lever
KMC Z510, single-speed, anti-drop, 1/2"x1/8"
Hi-Ten steel, 114mm
Steel, 36T
Bottom Bracket
Steel, loose ball bearings
Nylon platform w/ reflectors
20" alloy, 16mm depth, 21mm internal width
Front Hub
Steel, bolt-on, 100mm spacing, loose ball bearings, 36h
Rear Hub
Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h
Stainless, 14g
Front Tire
Rhythm Lite, 30 TPI, wire bead, 20x2.3"
Rear Tire
Rhythm Lite, 30 TPI, wire bead, 20x2.3"
Inner Tubes
Schrader valve
Specialized Kids' Henge
Steel, 25.4mm
Seat Binder
Bolt-type, 28.6mm