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    Since 1974, we've had one goal: Innovate and inspire to improve riders' lives.

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    Home / Riprock Coaster 20
    Riprock Coaster 20
    Riprock Coaster 20
    Riprock Coaster 20

    Riprock Coaster 20

    Riprock Coaster 20

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    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 steel
    Stem Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
    Handlebars BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
    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
    Chain KMC Z510, single-speed, anti-drop, 1/2\"x1/8\"
    Crankset Hi-Ten steel, 114mm
    Chainrings Steel, 36T
    Bottom Bracket Steel, loose ball bearings
    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\"
    * Specifications are subject to change without notice

    Technical Specifications

    Frame Specialized A1 Premium Aluminum
    Fork Hi-Ten steel
    Stem Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
    Handlebars BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
    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
    Chain KMC Z510, single-speed, anti-drop, 1/2\"x1/8\"
    Crankset Hi-Ten steel, 114mm
    Chainrings Steel, 36T
    Bottom Bracket Steel, loose ball bearings
    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\"
    * Specifications are subject to change without notice

    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