Specialized Riprock 20 – Kids' Mountain Bike 20"
Freedom is the absence of fear. And with the Specialized Riprock 20, the kids' mountain bike designed to tackle any adventure, safety and fun go hand in hand.
Designed to follow the imagination of young riders, the Riprock 20 combines modern MTB geometry, hydraulic disc brakes, Ground Control tires, and internal cable routing.
The result is a lightweight, responsive bike ready for anything: climbs, descents, and off-road trails become child's play.
The new Riprock has been completely redesigned based on children's actual proportions, to offer superior comfort, balance, and control.
From the thinnest grips to the ergonomic 130 mm Bridge saddle, every detail has been designed to improve posture and reduce the risk of fatigue or injury.
Thanks to its A1 Premium aluminum frame and 8-speed wide-range drivetrain, the Riprock 20 encourages young riders to push themselves higher and tackle trails with the same passion as the grown-ups.
Strengths
Modern mountain bike geometry: stability and handling on any terrain.
A1 Premium Butted Alloy aluminum frame: durable, lightweight, and ready for a dropper post.
Promax DSK-926 hydraulic disc brakes: safe and modulated braking power in any condition.
microSHIFT Acolyte 8-speed drivetrain: smooth, reliable, and with a wide gear range to tackle any climb.
Ground Control 20x2.1 Tires: optimal grip and control, even on dirt.
Specifically designed for kids: short cranks, reduced Q-factor, and narrow grips for a natural and comfortable position.
Technical Specifications
Frame
Frame: A1 Premium Butted Alloy, unisex frame, internal cable routing, 148 mm thru-axle, ready for 30.9 mm dropper post, replaceable derailleur hanger
Seat Binder: Bolt-type, 34.9 mm
Fork: A1 Premium Butted Alloy, alloy steerer tube, 15x110 mm, with mini fender
Brakes
Front brake: Promax DSK-926, hydraulic disc brake, adjustable reach lever
Rear brake: Promax DSK-926, hydraulic disc brake, 160 mm rotor, adjustable reach lever
Drivetrain
Shift lever: microSHIFT Acolyte Quick Trigger SL-M6285-R, 8 speed, short levers for ease of use
Rear derailleur: microSHIFT Super Short RD-M5185S, 8 speed, with clutch
Cassette: microSHIFT Acolyte CS-H084, 12-42T, 8 speed
Chain: KMC X8 with Missing Link™
Crankset: Forged alloy, 115 mm, reduced Q-factor, with chain guard
Chainring: 40T
Bottom bracket: Square-tapered, 68 mm
Wheels and Tires
Rims: Alloy, 16 mm depth, 25 mm internal width, 28 holes
Front hub: Alloy, 6 holes, 28H, 15x110 Boost
Rear hub: Alloy, 6 holes, 28H, 12x148 Boost, 11-speed compatible
Spokes: Stainless steel, 14g
Front tire: Kicker Wirebead 20x2.1
Rear tire: Kicker Wirebead 20x2.1
Inner tube: Standard, Schrader valve
Cockpit
Stem: Stout 3D-forged alloy, 31.8 mm, 6° rise
Handlebar: Double thickness alloy, 40 mm rise, 11° backsweep, 2.5° upsweep, 620 mm width
Grips: Specialized Trail lock-on
Saddle: Bridge Kids, 130 mm
Seatpost: Specialized 6061 alloy, 2-bolt clamp, 0 mm offset, 30.9 mm
Accessories
Product Details
Why choose the Specialized Riprock 20
The Specialized Riprock 20 is the perfect bike for young riders who want to grow in the MTB world.
It combines Specialized's build quality with an ergonomic design dedicated to kids, offering control, comfort, and safety on every terrain.
Whether tackling the first trails or simply enjoying freedom, the Riprock 20 is the ideal companion for every adventure.
Note Well
Technical specifications may change without notice depending on component availability.
Product images are purely indicative and may not exactly reflect the described features.
With the Specialized Riprock 20 every pedal stroke becomes an adventure: the kids' mountain bike that combines performance, safety, and pure fun on every trail.
Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly
A Complete Guide to Bike Sizes
Foreword: Not all bike sizes are the same
Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.
Bicycle adjustment margins
Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.
How to use size charts
We've created a simple guide to help you find the right bike size:
- Check out our size charts for each bike type.
- Learn more with specific tips to help you make the right choice.
Size Charts: Find Your Perfect Bike
Gravel and road bikes
Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.
| Cut
|
Recommended height
|
Horizontal tube length
|
| XS |
Up to 157 cm |
48-50 cm |
| S |
157-167 cm |
50-53 cm |
| M |
168-178 cm |
53-56 cm |
| THE |
178-185 cm |
56-58 cm |
| XL |
Over 185cm |
58-62 cm |
For gravel, measurements may vary slightly due to different geometries, but remain similar.
Mountain bike
MTBs are measured in inches, based on the seat tube.
| Cut
|
Recommended height
|
Size (in inches)
|
| XS |
Up to 157 cm |
14"-16" |
| S |
157-167 cm |
15"-17" |
| M |
168-178 cm |
16"-19" |
| THE |
178-185 cm |
18"-20" |
| XL |
Over 185cm |
20"-23" |
Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .
Children's bikes
The size depends on the size of the wheels, often associated with age:
| Age
|
Wheel Size
|
| 1-3 years |
12" |
| 2-4 years |
14" |
| 4-6 years |
16" |
| 5-8 years |
20" |
| 8-10 years |
24" |
| Over 10 years |
26"/27.5" |
What to do with half measures?
If you are between two sizes:
-
Comfort : Choose the larger size.
-
Performance : Go for the smaller size.
Final tips for choosing
-
Consult the manufacturer's instructions : Always check the brand's guidelines.
-
Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
-
Test the bike : If possible, test the model you intend to purchase.
