MSRP | ($290) | $549 |
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Where to Buy | — $1 At | $549 At Trek |
Category | General Youth | General Youth |
Weight | 25.8 lbs | 21.1 lbs |
Aluminum | Aluminum | |
Fork | Aluminum | |
Wheels | Aluminum | |
Wheel Size | 20″ | 24″ |
Brakes | Rim | Rim |
Groupset | microSHIFT Acolyte | |
Drivetrain | 1 × 8 | |
Brand Site | ||
Summary | The B’TWIN Rockrider ST 900 Kids Alloy Mountain Bike - 20" is a 20″ aluminum frame general youth bike with rim brakes. |
Frame | Alpha Silver Aluminum, 24'' | |
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Fork | Take on new challenging terrain (roots, stones, gravel, etc.) with ease thanks to the travel of the front suspension fork. | Wahoo 24'' alloy, V-brake bosses, ThruSkew 5mm QR |
Bottom Bracket | Sealed cartridge, 68mm | |
Headset | Integrated, sealed cartridge bearings | |
Stem | Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length | |
Handlebar | Bontrager alloy, 31.8mm, 15mm rise, 580mm width | |
Saddle | Kids' padded, integrated seatpost, Blendr light mount, 31.6x270mm | |
Pedals | Kids' Satellite, 9/16 thread | |
Grips | Size: 24" wheel, Kids' grip, 108mm width, lock-on; Size: 24" wheel, Kids' grip, 110mm width; Size: 24" wheel, Kids' grip, 108mm width |
Rear Derailleur | microSHIFT Acolyte M5180S, 34-38T max cog | |
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Crank | The new aluminium chainset has a 140 mm crank that is designed for a child's leg length. This lightweight chainset allows you to start pedalling more easily. The double chain guard prevents the chain from derailing. | Alloy, 28T steel ring, chainguard, 127mm length |
Shifters | microSHIFT Acolyte SL-M6285, 8 speed | |
Cassette | microSHIFT Acolyte H083, 11-38, 8 speed | |
Chain | KMC Z8 | |
Brakes | Rim | Alloy linear-pull |
Brake Levers | Kids' alloy brake lever, black |
Rims | Alloy 24'', 28h | |
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Front Hub | Formula alloy, 100mm ThruSkew | |
Rear Hub | Formula FM32 alloy, 135x5mm | |
Tires | The tyres are designed for mountain biking. The lateral lugs provide good grip on turns. The tyres use SkinWall technology. This process makes it possible to reduce their weight, provide greater flexibility, therefore increasing their performance, grip and comfort. The recommended tyre pressure is displayed on the tyre sidewall (between 2 and 3.5 bar). 20-inch 1.7"-2.2" wide inner tube with Schrader valve. | Bontrager Connection Comp, wire bead, 30 tpi, 24x2.00'' |