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Specialized Riprock Coaster 20" Kids Mountain Bike

Specialized Riprock Coaster 20" Kids Mountain Bike

Regular price $325.00
Regular price $325.00 Sale price $325.00
Sale Sold out


One Size 3'11" to 4'7"


Shipped Direct to Your Home

Our Platinum Pro Assembly fee of only $75 will be added at checkout. Your Specialized kids bike will be built, fine-tuned and expertly packaged by our certified team of bike techs. Your new bike comes 90% built, reassembly is quick and easy with our video guides. Your new bike ships within 3-5 business days.

Pick Up at Bicycle Warehouse

$25 Ready to Ride

Bikes comes 100% built and ready to ride. This fee includes professional assembly & setup, one basic Master Service and free warranty processing. Shipped bikes are not charged this fee.


At Bicycle Warehouse your satisfaction is our top priority. We understand the importance of your happiness with every purchase, which is why we proudly offer our 30 Day Love It Guarantee for your unused gear and 14 days on all bikes. Our exchange and returns process is quick and easy.

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Get your dream bike today with FREE financing (12 months same as cash, on approved credit). For more information visit our financing page and get approved.

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Get ready to unleash your kid's inner trail-blazing, dirt-loving dynamo with the Specialized Riprock Coaster 20" Kids Mountain Bike! This two-wheeled marvel is like a masterclass in traction, control, and all-out giggles. We're talking about a bike that transforms every ride into a gravity-defying adventure.

Picture this: your mini shredder conquering trails and urban jungles alike, all while sporting a grin that could power a small city. It's not magic; it's the Riprock 20 Coaster in action. The secret sauce? Those beefy 2.3-inch tires that grip the terrain like a pro climber on a mountain face. Rocks, roots, sand—consider them all fair game.

Imagine the ease of a single-speed setup combined with the security blanket of an intuitive coaster brake. It's a recipe that banishes the fear of endos and tumbles, allowing your young daredevil to focus on what really matters: pure unadulterated FUN.

We're talking about 20-inch wheels that roll over obstacles like they're not even there. Plus, these wheels are practically begging to spin and spin, whether on a dirt path or a neighborhood race.

So, parents and adventurers alike, if you're ready to turn your kid into a bona fide Ripper, the Riprock 20 Coaster is the ticket to ride. It's more than a bike—it's a one-way ticket to endless giggles, trail tales, and memories that'll last a lifetime. Suit up, saddle up, and let the trails become your kid's playground!


  • 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.



Specialized A1 Premium Aluminum


Hi-Ten steel

Seat Binder

Bolt-type, 28.6mm


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


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


Specialized, slip-on


Specialized Kids' Henge


Steel, 25.4mm

Rear Brake

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


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


Hi-Ten steel, 114mm


Steel, 36T

Bottom Bracket

Feimin FP-B701, 68MM


Nylon platform w/ reflectors


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


Stainless, 14g

Front Tire

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

Rear Tire

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

Inner Tubes

Schrader valve


Crank Length 114mm
Stem Length 37mm
Handlebar Width 560mm
Seatpost Length 220mm
Saddle Width 143mm
Seat Tube Length, BB Center to Top 250mm
Top Tube Length, Horizontal 449mm
BB Drop 42mm
Chainstay Length 386mm
Seat Tube Angle 72°
Head Tube Angle 70°
Fork Rake 23mm
Trail 71mm
Front Center 476mm
Wheelbase 858mm
Standover Height 477mm
Head Tube Length 80mm
Reach 315mm
Stack 413mm