Specialized Riprock 20" Coaster Bike (Sterling Grey/Nordic Red/Hyper Reflective) (20")

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

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Specialized Riprock 20" Coaster Bike Description:

The Riprock 20 Coaster is the perfect bike for your little one 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.


  • 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: Grey
Why buy a Specialized bike from us?

This product was added to our catalog on February 6, 2020

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