Riprock Coaster 20
Part No.:  

Riprock Coaster 20

Part No.:  
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Riprock Coaster 20
Overview
Technical Specifications
Geometry

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. 

Technical Specifications

DRIVETRAIN
BOTTOM BRACKET Steel, loose ball bearings
CHAIN KMC Z510, single-speed, anti-drop, 1/2"x1/8"
CRANKSET Hi-Ten steel, 114mm
CASSETTE 18T cog
CHAINRINGS 36T
SUSPENSION
FORK Hi-Ten, 1-1/8" steerer
COCKPIT
SADDLE Specialized Kids' Henge
SEAT BINDER Bolt-type, 28.6mm
SEATPOST Steel, 25.4mm
HANDLEBARS BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
GRIPS Specialized, slip-on
WHEELS & TIRES
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
INNER TUBES Schrader valve
SPOKES Stainless, 14g
RIMS 20" alloy, 16mm depth, 21mm internal width
FRONT TIRE Rhythm Lite, 30 TPI, wire bead, 20x2.3"
REAR TIRE Rhythm Lite, 30 TPI, wire bead, 20x2.3"
BRAKES
FRONT BRAKE V-brake w/ tool-less reach adjust brake lever
REAR BRAKE V-brake w/ tool-less reach adjust brake lever
ACCESSORIES
PEDALS Nylon platform w/ reflectors
FRAMESET
FRAME Specialized A1 Premium Aluminum

Geometry

Geometry Chart

Riprock - Geometry

9
  9
Crank Length 114mm
Stem Length 37mm
Seatpost Length 220mm
Saddle Width 143mm
Handlebar Width 560mm
Reach 315mm
Top Tube Length, Horizontal 449mm
Stack 413mm
Wheelbase 858mm
Chainstay Length 386mm
Front Center 476mm
BB Drop 42mm
Seat Tube Angle 72°
Head Tube Angle 70°
Head Tube Length 80mm
Seat Tube Length, BB Center to Top 250mm
Fork Rake 23mm
Standover Height 477mm
Trail 71mm