Specialized Riprock Coaster 20
I’m interested

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. 
Monster Green/Nordic Red/Black; Rainbow Flake Pink/Deep Fuchsia/Metallic White Silver; Royal Blue/Moto Orange/White; Satin Sterling Grayl/Nordic Red/Hyper Green; Turquoise/Hyper Green/Light Turquoise
Specialized A1 Premium Aluminum
Hi-Ten, 1-1/8" steerer
Bottom Bracket
Steel, loose ball bearings
KMC Z510, single-speed, anti-drop, 1/2"x1/8"
Hi-Ten steel, Hi-Ten steel, 114mm
18t cog
Bmx, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
Specialized, slip-on
Rear Brake
V-brake w/ tool-less reach adjust brake lever
Nylon platform w/ reflectors
Specialized Kids' Henge
Seat Binder
Bolt-type, 28.6mm
Steel, 25.4mm
Front Wheel
Steel, bolt-on, 100mm spacing, loose ball bearings, 36h
Rear Wheel
Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h
Inner Tubes
Schrader valve
Rhythm lite, 30 tpi, wire bead, 20x2.3"
Our shop address

Blazing Saddles Bike Rentals & Tours
2715 Hyde Street
San Francisco, CA 94109

Open hours
8:00am - 6:00pm, daily
Let's schedule an appointment!
37.8060609, -122.4209327

Bike Renting Made Easy in San Francisco & New York
To keep you focused on your Biking Experience
Reserve now
20% OFF
We Love Our Community