V-brake w/ tool-less reach adjust brake lever

KMC Z510, single-speed, anti-drop, 1/2"x1/8"

Steel, bolt-on, 100mm spacing, loose ball bearings, 36h

BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm

Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h

20" alloy, 16mm depth, 21mm internal width

Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter

Front: Rhythm Lite, 30 TPI, wire bead, 20x2.3", Rear: Rhythm Lite, 30 TPI, wire bead, 20x2.3"

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.

Specialized Riprock Coaster 20

The Specialized Riprock is a well-designed youth mountain bike that excels in lightweight construction, modern geometry, and kid-specific components, making it an excellent choice for young trail riders. Its slacker geometry, reduced chainstay lengths, and dropped stack heights improve handling and comfort, while the inclusion of hydraulic disc brakes and wide-range cassettes enhances performance. However, some models feature rigid forks, which may limit suspension performance for more aggressive trails.

MSRP	($577)
Where to Buy	— $1 At
Category	General Youth

Frame	Aluminum
	Steel
Wheels	Aluminum
Wheel Size	20″
	Coaster



Drivetrain
Brand Site	specialized.com
Summary	The Specialized Riprock Coaster 20 is a 20″ aluminum frame general youth bike with coaster brakes.

Frame	Specialized A1 Premium Aluminum
Fork	Hi-Ten steel
Bottom Bracket	Steel, loose ball bearings
Stem	Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter
Handlebar	BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
Saddle	Specialized Kids' Henge
Seatpost	Steel, 25.4mm Type: Rigid
Pedals	Nylon platform w/ reflectors
Grips	Specialized, slip-on

Crank	Hi-Ten steel, 114mm, Steel, 36T
Chain	KMC Z510, single-speed, anti-drop, 1/2"x1/8"
Brakes	V-brake w/ tool-less reach adjust brake lever Type: Coaster

Rims	20" alloy, 16mm depth, 21mm internal width
Spokes	Stainless, 14g
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
Tires	Front: Rhythm Lite, 30 TPI, wire bead, 20x2.3", Rear: Rhythm Lite, 30 TPI, wire bead, 20x2.3"