Cycling
Winter
Running
Hiking
Did you find a better price?
If possible, we will give you an even better one. Don't hesitate to write to us.
Ask for a better price
A kids’ 20" mountain bike with a 6061-T6 aluminum frame, Rubena Cheetah 20 × 2.10 tires, and a microSHIFT rear derailleur.
Detailed Description
Rock Machine follows the rule: Fun first, and then more fun. From humble garage beginnings in 1994 to the present, you can see Rock Machine bikes on World Cup tracks, but mainly on trails where Rock…
More about the brand Rock MachineA kids’ 20" mountain bike with a 6061-T6 aluminum frame, Rubena Cheetah 20 × 2.10 tires, and a microSHIFT rear derailleur.
Detailed DescriptionDo you have a VAT number? Shop without VAT.
Some parts of this page are translated automatically, so please excuse any imperfections.
Rock Machine RIFF Tr 20 kids’ bike Matte Deep Ocean Blue is a children’s mountain bike designed for off-road riding and family trips. It’s built around a durable aluminum frame and a simple seven-speed drivetrain. The spec targets the affordable segment, where function, low-maintenance service, and the right wheel size are what matter.
The frame is made from 6061-T6 aluminum with heat treatment, which supports stiffness and long-term durability. The geometry matches a kids’ MTB with an emphasis on stability and easy tracking. Up front, a rigid Alloy Custom Tubing fork reduces weight and simplifies maintenance. The Matte Deep Ocean Blue colorway falls within the blue range and improves the bike’s visibility in traffic.
Drivetrain: microSHIFT DS45-7R shifter controls 7 speeds and works with the microSHIFT RD-M21SS rear derailleur. The Shimano CS-HG200-7 cassette offers a 12–28-tooth range, and the chain is a KMC Z8.3.
Brakes: The Tektro MDM 280 brakes are rim brakes, aimed at straightforward servicing. The controls are set up for smaller hands, and modulation is predictable at lower speeds.
Wheels and tires: The wheels are 20" and are built on Stars J19SD rims with 24 holes. Rubena Cheetah 20 × 2,10 tires add volume for traction and cushioning on gravel.
Cockpit: One1 Alloy MTB AL-153BT handlebars and the One1 MAS-MD60368 Alloy stem hold an MTB position with good control. A Selle Royal Junior saddle is paired with a One1 Alloy 27,2 mm seatpost and VELO grips.
The combination of an aluminum frame and a rigid fork transfers pedaling power without unnecessary losses, which you’ll notice on flats and mild climbs. The 2,10-wide tires increase stability and help on roots and loose gravel. 24-spoke rims and quick-release hubs make servicing and tube changes easier. The seven-speed range with a 12–28 cassette supports a steady pace on bike paths and in light off-road terrain.
The bike is intended for kids moving up to a 20" MTB and wanting to ride off the pavement. You’ll appreciate it on trips with parents as well as on gravel roads, where handling and simple operation matter most. In concept, it matches kids’ hardtails with a seven-speed drivetrain and a rigid fork.
EAN: 8592842219617
Children's Bikes
| size | models | height (cm) |
|---|---|---|
| 20" | Blizz 20 / Riff Tr 20 / Thunder 20 / Riff Jr 20 / Catt Jr 20 |
110 - 130 |
| 24" | Blizz 24 / Riff Tr 24 / Thunder 24 / Riff Jr 24 / Catt Jr 24 |
120 - 145 |
| 27" XS | Thunder 27 / Riff Jr 27 / Catt Jr 27 / Blizz 27 / Riff Tr 27 size XS |
135 - 155 |
| 27" S | Thunder 27 / Riff Jr 27 / Catt Jr 27 / Blizz 27 / Riff Tr 27 size S | 140 - 160 |
| 29" XS | Thunder 29 size XS | 140 - 160 |
| 29" S | Thunder 29 size S | 145 - 165 |
Manufacturer: BIKE FUN International s.r.o., Areál Tatry 1445/2, 74221 Kopřivnice, info@bikefunint.com, www.rockmachinebikes.com/en-en
Aluminum 6061-T6, heat-treated
Alloy Custom Tubing
Rubena Cheetah 20 × 2.10
Stars J19SD, 24 holes
One1 KTTD8F, M9 × 100 mm, quick-release; One1 KTTD2R, M10 × 135 mm, quick-release
Sapim Galvanized Black
microSHIFT DS45-7R (right)
microSHIFT RD-M21SS
Wheel Top SXB4BL-MS
Shimano CS-HG200-7 (12–28 teeth)
KMC Z8.3
VP Components 229, platform
One1 Alloy MTB AL-153BT
One1 MAS-MD60368 Alloy
VELO
Tektro MDM 280
Selle Royal Junior
One1 Alloy; 27.2 mm
Aluminum Alloy
Blue
Mountain Biking, Cycling With the Kids
The wheel manufacturer reserves the right to change the wheel specifications without any reason. In exceptional cases, the delivered product may differ from the specified specifications and images to improve the availability or functionality of the wheel.
Rock Machine follows the rule: Fun first, and then more fun. From humble garage beginnings in 1994 to the present, you can see Rock Machine bikes on World Cup tracks, but mainly on trails where Rock…
More about the brand Rock MachineDo you need help choosing the right product?
Contact us.
Ask a question
Cannondale Kids Trail Plus 20 kids bike Cactus Green
A kids’ 20" trail bike for off-road riding, with wider tires for stability and more confident handling on trails.
Buy
Cannondale Quick 20 children's bike ORC
Children's bike, lightweight aluminum frame, 20" wheels with Kenda tires, fixed fork, MicroShift 1x7sp.gearing, kickstand.
Buy
Beany Blaster XC 20 kids' bike White
Children's bike 20", aluminum frame and fork, 1x8 speeds, Shimano disc brakes, frame size 10", suitable for height 110 cm - 130 cm, weight 7.9 kg, load…
Buy
Beany Blaster XC 20 children's bike Black
Children's bike 20", aluminum frame and fork, 1x8 gears, Shimano disc brakes, frame size 10", suitable for heights 110 cm - 130 cm, weight 7.9 kg, carrying…
Buy
Woom GO 4 children's bike 20" Metallic Turquoise
Children's bike, 20" wheel diameter, lightweight aluminum frame, rigid front fork, for ages 6-8, for height 115-130 cm, weight 7.8 kg, chain guard, weight…
Buy
Woom GO 4 kids bike 20" Red
Children's bike, 20" wheel diameter, lightweight aluminum frame, rigid front fork, for ages 6-8 years, for height 115-130 cm, weight 7.8 kg, chain guard,…
Buy
Beany Blaster XC 20 kids bicycle Mint
Children's bike 20", aluminum frame and fork, 1x8 speeds, Shimano disc brakes, frame size 10", suitable for a height of 110 cm - 130 cm, weight 7.9 kg, maximum…
Buy
Woom GO 4 children's bike 20" Vibrant Yellow
Children's bike, wheel diameter 20", lightweight aluminum frame, rigid front fork, for ages 6-8, for height 115-130 cm, weight 7.8 kg, chain guard, weight…
Buy
Beany Blaster XC 20 children's bike Gold
Children's bike 20", aluminum frame and fork, 1x8 speeds, Shimano disc brakes, frame size 10", suitable for height 110 cm - 130 cm, weight 7.9 kg, load…
Buy
Woom GO 4 children's bike 20" Metallic Blue
Children's bike, 20" wheel diameter, lightweight aluminum frame, rigid front fork, suitable for ages 6-8, for height 115-130 cm, weight 7.8 kg, chain guard,…
Buy
Cannondale Trail Plus 20 children's bike Salmon
Children's mountain bike, aluminum frame, aluminum rigid fork, MicroShift 1x7 shifter, mechanical disc brakes, wide 20 x 2.6" tires.
Buy
Rascal 20 children's bicycle Titanium
Super lightweight children's bike with an original aluminum frame, belt drive, and a 3-speed Sturmey Archer planetary gearbox.
Buy
Early Rider Belter 20 Auto Sage Green children's bike 2025
20" children's bike, for kids aged 6-8, weight 7.7 kg, seat height 50 cm, tires 20x2.0", belt drive, 2-speed derailleur, rim brakes
Buy
Superior F.L.Y. 20 VB kids bike Gloss Yellow
Superior F. L. Y. 20 VB kids’ bike, lightweight aluminum frame, 1x7sp. shifting, rigid aluminum fork, weight 7.95 kg, for children 100–130 cm.
Buy
Superior F.L.Y. 20 VB kids bike Matte Teal
Children's bike Superior F. L. Y. 20 VB, lightweight aluminum frame, shifting 1x7 speed, rigid aluminum fork, weight 7.95 kg, for children 100-130 cm.
Buy
Superior F.L.Y. 20 VB kolo Gloss Purple 9.0"
Children's bike Superior F. L. Y. 20 VB, lightweight aluminum frame, shifting 1x7 speed, rigid aluminum fork, weight 7.95 kg, for children 100-130 cm.
Buy
Cannondale Kids Trail Plus 20 ORG children's bike
Children's mountain bike, aluminum frame, aluminum rigid fork, MicroShift 1x7 gearing, mechanical disc brakes, wide 20 x 2.6" tires.
Buy
Early Rider Belter Auto 20" kids bike Brushed Aluminium 2026
20" children’s bike, for children aged 6–8, weight 7.7 kg, saddle height 50 cm, 20x2.0" tires, belt drive, 2-speed derailleur, rim brakes
Buy
Early Rider Belter Auto 20" kids bike Forest Green 2026
20" kids’ bike, for children aged 6–8, weight 7.7 kg, saddle height 50 cm, 20x2.0" tires, belt drive, 2-speed derailleur, rim brakes
Buy
Early Rider Belter Auto 20" kids bike Electric Purple 2026
20" kids’ bike, for children aged 6–8, weight 7.7 kg, saddle height 50 cm, 20x2.0" tires, belt drive, 2-speed derailleur, rim brakes
Buy
Für Versand nach Deutschland, besuchen Sie bitte Rock Machine RIFF Tr 20 Kinderfahrrad Matte Deep Ocean Blue
Für Versand nach Österreich, besuchen Sie bitte Rock Machine RIFF Tr 20 Kinderfahrrad Matte Deep Ocean Blue
Chcesz dostarczyć towar do Polski? Sprawdź Rock Machine RIFF Tr 20 rower dziecięcy Matte Deep Ocean Blue
Chcete doručit zboží do České republiky? Prohlédněte si Rock Machine RIFF Tr 20 dětské kolo Matte Deep Ocean Blue
Chcete doručiť tovar na Slovensko? Pozrite si Rock Machine RIFF Tr 20 detský bicykel Matte Deep Ocean Blue
We'll give you an even better one if we can.
I want to be informed if:
Proven quality you can trust
Handpicked and quality-checked
Our team helps you find your perfect fit
Mon - Fr: 10 am to 3 pm
We will reply within 24 hours
Added to Cart
Why create an account?
We have sent a confirmation email to .
Open it, click on the confirmation link and you are ready to shop.
Technical Support
+43 144 20070Mon - Fri: 9:00 to 5:00 PM
info@koloshop24.comWe will respond within 24 hours
during business hours
Write us with the specifications of the bike and add a photo.
![Netherlands [EUR]](/images/front/locales/NLD.svg)
Write a review
Continue Shopping
Via Facebook
Via Google
