Specialized Riprock 20" Coaster Bike (Monster Green/Nordic Red/Black Reflective)

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Price: $325.00 (Save 8%)
Sale: $299.99

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Specialized Riprock 20" Coaster Bike Description:

With the Specialized Riprock Coaster 20", riding gets boiled down to its simplest element, fun. And to make sure of it, Specialized 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 20x2.3" 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 trails.


  • 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.


  • Frame: Specialized A1 Premium Aluminum
  • Fork: Hi-Ten Steel
  • Front Hub: Steel (Bolt-On) (Loose Ball Bearings) (36H)
  • Rear Hub: Coaster Brake (Bolt-On) (Loose Ball Bearings) (110mm Spacing) (18T) (36H)
  • Spokes: Stainless Steel (14g)
  • Rims: 20" Alloy (16mm Depth) (21mm Internal Width)
  • Inner Tubes: Schrader Valve
  • Front Tire: Rhythm Lite (30 TPI) (Wire Bead) (20 x 2.3")
  • Rear Tire: Rhythm Lite (30 TPI) (Wire Bead) (20 x 2.3")
  • Crankset: Hi-Ten Steel (114mm)
  • Chainrings: Steel (36T)
  • Bottom Bracket: Steel (Loose Ball Bearings)
  • Chain: KMC Z510 (Single Speed) (1/2" x 1/8")
  • Rear Brake: V-Brake/Coaster Brake
  • Handlebars: BMX (Steel) (10° Backsweep) (4° Upsweep) (130mm Rise) (560mm Width) (22.2mm Diameter)
  • Grips: Specialized (Slip-On)
  • Saddle: Specialized Kids' Henge
  • Seatpost: Steel (25.4")
  • Seat Binder: Bolt-Type (28.6mm)
  • Pedals: Nylon Platform (w/Reflectors)
  • Color: Green
Why buy a Specialized bike from us?

This product was added to our catalog on March 25, 2021

Measurement Guide:

  • Frame size by rider height:
Rider Height (cm)Rider Height (in)
Riprock 12"79 - 94cm31 - 37"
Riprock 16"94 - 107cm37 - 42"
Riprock 20"107 - 133cm41 - 52"
Riprock 24"119 - 142cm47 - 56"


    Crankarm LengthStem LengthHandlebar WidthSeatpost Length (Bottom Bracket Center to TopTop Tube Length (Horizontal)Bottom Bracket DropChainstay LengthSeat Tube AngleHead Tube AngleFork Rake/OffsetTrailFront CenterWheelbaseStandover HeightHead Tube LengthReachStack
    Riprock 12"76mm35mm470mm190mm350mm11mm272mm71°70°5mm53mm331mm603mm356mm80mm222mm274mm
    Riprock 16"89mm37mm520mm230mm359mm27mm310mm71°70°5mm72mm399mm707mm405mm80mm272mm358mm
    Riprock 20"114mm37mm560mm220mm449mm42mm386mm72°70°23mm71mm476mm858mm477mm80mm315mm350mm
    Riprock 24"140mm35mm620mm300mm479mm30mm390mm73.5°68°42mm83mm565mm953mm593mm95mm350mm449mm