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Riprock 20


Riprock 20

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Freedom is the absence of fear. And riding fearlessly requires a bike that can handle your kid’s imagination. It’s why we designed Riprock to be a mountain bike inclusive of all the features needed for superior ripping, like modern geometry, Ground Control tires, hydraulic disc brakes, and internally routed cables. Finally, we threw in a wider-range drivetrain, making Riprock truly the perfect bike to inspire riders to climb higher and tackle the downhills freely.

Kids can’t ride confidently if they’re not riding comfortably. With Riprock, fit comes first. This meant using data to reimagine everything from how they grip to how they sit to create a bike specifically and proportionally for kids. We did all this because comfort creates confidence. And more confidence always leads to more riding fearlessly.

Technical Specifications

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Shift Levers

microSHIFT Advent SL-M6190, 9-speed , short reach triggers for easy operation


KMC X9EPT, 9-speed, anti-corrosion coating w/ reusable Missing Link™

Rear Derailleur

MicroSHIFT Advent 9 Speed, W/O Clutch


Forged Alloy, 115mm length, narrow Q-factor, w/ chainguard


microSHIFT Advent, 9-speed, 11-42t


30T, chainguard

Bottom Bracket

Square-tapered, 68mm



A1 Premium Butted Alloy, unisex frame, internal cable routing, 148mm thru-axle, 30.9mm dropper post ready, replaceable derailleur hanger compatible


A1 Premium Butted Alloy, Alloy steerer, 15x110 mm, W/Mini Fender

Seat Binder

Bolt-type, 34.9mm

Wheels & Tires


Alloy, 16mm depth, 25mm internal width, 28H

Front Hub

Alloy, 6-Bolt, 28H, 15x110 Boost

Rear Hub

Alloy, 6-Bolt, 28H, 12x148 Boost, 11-speed compatiable

Front Tire

Ground Control Sport, 20x2.35"

Rear Tire

Ground Control Sport, 20x2.35"

Inner Tubes

Schrader valve


Stainless, 14g


Front Brake

C-STAR Hydraulic Disc Brake, 160mm rotor, adjustable reach

Rear Brake

C-STAR Hydraulic Disc Brake, 160mm rotor, adjustable reach



Kids Bridge Saddle, 130mm


Specialized, 6061 alloy, 2-bolt clamp, 0mm setback, 30.9mm


Mini Rise, Alloy Double Butted, 6-degree Backsweep, 600mm Width, 31.8mm , 19mm Bar End Diameter


Stout 3D-forged alloy, 31.8mm, 6-degree rise


Specialized Trail Grips, 19mm bar end diameter, lock-on



Nylon platform w/ reflectors



9.9kg (21 lb, 13.2 oz)

Weight Size

One Size

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.


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Crank Length115mm
Handlebar Width600mm
Stem Length35mm
Saddle Width130mm
Seatpost Length300mm
Head-Tube Length75mm
Head-Tube Angle68°
B-B Height239mm
B-B Drop30mm
Fork Length (full)320mm
Fork Rake/Offset40mm
Chain-Stay Length350mm
Top-Tube Length (horizontal)405mm
Bike Stand-Over Height520mm
Seat-Tube Length290mm
Seat-Tube Angle73.5°

Rider Reviews

  • 3.4
  • 10 Reviews

Terrible Brakes

The brakes never worked well then officially died after 4 hrs of riding. Honestly maybe 3 hrs. The stem is cut super short so you can’t adjust the geo. The rear derailleur almost touches the ground in some gears, it won’t even fit rear wheel side into a normal floor rack. Just a really terrible bike for the money. Either spend up or spend down - don’t get stuck with this lemon. The positives: Shifter, tires, frame & fork material/ finish. Bottom bracket, hubs/ rims are acceptable but not great.



Not sure

Puts my kid in a very aggressive stance. He doesn’t like it. Too much weight on his arms/hands. Had to replace the brakes after a few months. They are terrible.



Great bike…except for the brakes

Purchased in late 2021 for my then 5 year-old son. Great fit/geometry and a pretty good overall package for an enthusiastic little rider. However, within 3 months the Radius brakes began to fail. The Specialized-owned shop that sold me the bike promptly exchanged the whole bike for a new one. More than I would have asked for and seemed like a waste, but whatever. Bike #2 rode well for several months but right around the 1-year warranty date the brakes again began to fail. Back to the shop, they couldn’t warranty again but did their best to service them, which bought us a few rides but again they failed. Specialized should do better than to put such faulty, outright dangerous brakes on a bike, especially a kids bike. I know it was probably to hit a price point, but brakes are not the part to go with an no-name brand to save $$. As long as they are are still speccing these Radius brakes on the Riprock 20, I would strongly discourage any parent from buying this bike for their kids.



Solid choice for advance young riders

Got this for my 5 year old son over a year ago. For context he was riding since 2 and was coming from a Woom 3 (Strider -> Woom 2 -> Woom 3) which he used for all terrains but mostly dirt and gravel trails. The Riprock is a great value for what you get and the clearance for the wider tires on the riprock is a high selling point: the extra traction and stability on the trails is really noticeable (also having tires as wide as dad's bike has its own special joy). The weight is great as well; any heavier might have been discouraging. This was his first experience with gears and the shifter is crisp and very easy to trigger. The gear range is well suited for a wide variety of riding. We did run into a problem with one of the brake levers/reservoirs leaking which was a bummer but Specialized had us covered and nothing really beat the sight of the giant black Specialized sprinter van/mobile bikeshop pulling up to replace the whole lever under warranty. Overall the bike has been great!



Not a good fit for kids

We bought this bike for our son’s 5th birthday. He’s about as tall as our 7 year old son for size reference. Until now he’s been riding a specialized rip rock coaster 20 and it’s great but we are in need of some gears. Bought this one expecting it to be great and it isn’t. The fit is wrong and the gears are not great, especially the way they’re switched. The handle bars are so low he was riding in a completely different position and no longer as confident in his riding. As for the gears, they’re trigger switch, not grip switch, so it isn’t as easy or intuitive for younger riders. We have other sons on gear bikes one a salsa and one an REI coop and much prefer those over this one unfortunately. The Jett probably would have been a better choice.



Awesome Kids Bike

There is nothing out there that completes with this bike for kids, tons of fun!

Verified Buyer


Kevin P.


Great bike capable of riding

Great bike capable of riding actual trails and well built perfect for the little ones

Verified Buyer


Juan C.


Tough, well made little bike, but...

The brakes are not good. They did not work well out of the box and we lived with it since she was still learning the controls. She is ready to rip now, but the brakes are dead (lever to grip, no pad engagement), will not bleed correctly, and will likely never work. I bleed the brakes/repair all my bikes (for decades at this point) and never have an issue and thus will be replacing these brakes at my cost to get my little shredder rolling again. Any potential buyer should plan to replace them as well. One other thing to note is that many of the bolts did not have any grease. I liked that the bike came with some basic tools for assembly and setup (though I did not need them).



Real 20" MTB

Awsome 20" MTB . Best Value around ! Rigid fork with wider volume tires make lot of sense for 20" bike. My son has been absolutly loving it. Only couple of thigs I would point out which needs to updated is 1. microshift derailleur needs to be the "super short" version on this bike . the one spec'd is too long and gets damaged easily. I have had couple of repairs already on the derailleur 2. Need additional stack height adjustment. Fork was cut with just 2 5mm spacers , wish they had left more spacers



I love these bikes.

I love these bikes.

Verified Buyer


Guest G.