Specialized Riprock Coaster 20 – Satin Deep Marine / Fiery Red


  • 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.
  • 20×2.3″ Rhythm Lite tires deliver tons of traction, comfort, stability, and fun over all types of terrain.
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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.





We are riders—that fact has guided our every decision since 1974. When quality tires weren't around, we strove to make the best. When people wanted to ride cruisers in the dirt, we made the first production mountain bike. When roadies wanted to go faster, we doubled-down on carbon and built our own wind tunnel. And when we saw kids struggling to focus in school, we started the Specialized Foundation to help them through cycling. Specialized. Made for riders, by riders.


Frame: Specialized A1 Premium Aluminum

Fork: Hi-Ten steel

Seat Binder: Bolt-type, 28.6mm


Stem: Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter

Handlebars: BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm

Grips: Specialized, slip-on

Saddle: Specialized Kids' Henge

SeatPost: Steel, 25.4mm


Front Brake: V-brake w/ tool-less reach adjust brake lever

Rear Brake: V-brake w/ tool-less reach adjust brake lever


Chain: KMC Z510, single-speed, anti-drop, 1/2"x1/8"

Crankset: Hi-Ten steel, 114mm

Chainrings: Steel, 36T

Bottom Bracket: Feimin FP-B701, 68MM


Pedals: Nylon platform w/ reflectors


Rims: 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

Spokes: 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

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.