Riprock Coaster 20

Riprock Coaster 20

Part No. B6517-9609

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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. 
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

Frame Specialized A1 Premium Aluminum
Fork Hi-Ten, 1-1/8\" steerer
Handlebars BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
Stem Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
Grips Specialized, slip-on
Saddle Specialized Kids\' Henge
Seatpost Steel, 25.4mm
Front Brake V-brake w/ tool-less reach adjust brake lever
Rear Brake V-brake w/ tool-less reach adjust brake lever
Cassette 18T cog
Crankset Hi-Ten steel, 114mm
Chainrings 36T
Bottom Bracket Steel, loose ball bearings
Chain KMC Z510, single-speed, anti-drop, 1/2\"x1/8\"
Rims 20\" alloy, 16mm depth, 21mm internal width
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
Spokes Stainless, 14g
Front Tire Rhythm Lite, 30 TPI, wire bead, 20x2.3\"
Rear Tire Rhythm Lite, 30 TPI, wire bead, 20x2.3\"

Technical Specifications

Frame Specialized A1 Premium Aluminum
Fork Hi-Ten, 1-1/8\" steerer
Handlebars BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
Stem Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
Grips Specialized, slip-on
Saddle Specialized Kids\' Henge
Seatpost Steel, 25.4mm
Front Brake V-brake w/ tool-less reach adjust brake lever
Rear Brake V-brake w/ tool-less reach adjust brake lever
Cassette 18T cog
Crankset Hi-Ten steel, 114mm
Chainrings 36T
Bottom Bracket Steel, loose ball bearings
Chain KMC Z510, single-speed, anti-drop, 1/2\"x1/8\"
Rims 20\" alloy, 16mm depth, 21mm internal width
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
Spokes Stainless, 14g
Front Tire Rhythm Lite, 30 TPI, wire bead, 20x2.3\"
Rear Tire Rhythm Lite, 30 TPI, wire bead, 20x2.3\"

Geometry

Geometry Chart

Geometry

  20
Seat-Tube Length,BBCentertoTop 250mm
Top-Tube Length (Horizontal) 449mm
B-B Drop 42mm
Chain-Stay Length 386mm
Seat-Tube Angle 72deg
Head-Tube Angle 70deg
ForkRake 23mm
Trail 71mm
Front-Center 476mm
Wheelbase 858mm
StandoverHeight 477mm
Head-Tube Length 80mm
Reach 315mm
Stack 413mm

Geometry

Geometry Chart

Geometry

  20
Seat-Tube Length,BBCentertoTop 250mm
Top-Tube Length (Horizontal) 449mm
B-B Drop 42mm
Chain-Stay Length 386mm
Seat-Tube Angle 72deg
Head-Tube Angle 70deg
ForkRake 23mm
Trail 71mm
Front-Center 476mm
Wheelbase 858mm
StandoverHeight 477mm
Head-Tube Length 80mm
Reach 315mm
Stack 413mm