Riprock Coaster 12
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Riprock Coaster 12

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Riprock Coaster 12
Technical Specifications

With our Riprock Coaster 12, riding gets boiled down to its simplest element—fun. And to make sure of it, we designed the bike with tons of cool features that are easy for your little ones to use, like a coaster brake for simple stopping, wide 12x2.3" tires that increase stability and confidence, and tough components that will stand up to years of abuse. It's the perfect bike for your little ripper to start getting out on the trail with—we just wish that we had one when we were kids.

  • 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.
  • 12x2.3" Rhythm Lite tires deliver tons of traction, comfort, stability, and fun over all types of terrain.

Technical Specifications

CHAIN KMC Z510, single-speed, anti-drop, 1/2"x1/8"
BOTTOM BRACKET Steel, loose ball bearings
CRANKSET Hi-Ten steel, 76mm
FORK Hi-Ten, 1" threaded steerer
SEAT BINDER Bolt-type, 28.6mm
SADDLE Specialized Kids'
SEATPOST Steel, 22.2mm
HANDLEBARS BMX, steel, 10-degree backsweep, 4-degree upsweep, 65mm rise, 470mm width, 22.2mm
GRIPS Specialized, slip-on
FRONT HUB Bolt-on, 95mm spacing, loose ball bearings, 16h
REAR HUB Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 16T cog, 16h
SPOKES Stainless, 14g
RIMS 12" alloy, 16mm depth, 21mm internal width
FRONT TIRE Rhythm Lite, 30 TPI, wire bead, 12x2.3"
REAR TIRE Rhythm Lite, 30 TPI, wire bead, 12x2.3"
FRONT BRAKE V-brake w/ tool-less reach adjust brake lever
REAR BRAKE Coaster brake
PEDALS Nylon platform w/ reflectors
FRAME Specialized A1 Premium Aluminum


Geometry Chart

Riprock - Geometry

Crank Length 3in
Stem Length 35mm
Seatpost Length 190mm
Saddle Width 110mm
Handlebar Width 470mm
Reach 222mm
Top Tube Length, Horizontal 350mm
Stack 274mm
Wheelbase 603mm
Chainstay Length 272mm
Front Center 331mm
BB Drop 11mm
Seat Tube Angle 71°
Head Tube Angle 70°
Head Tube Length 80mm
Seat Tube Length, BB Center to Top 170mm
Fork Rake 5mm
Standover Height 365mm
Trail 53mm