WORDS FROM OUR TEAM
We created this ST 900 mountain bike at our B'Twin Village (Lille, France), especially for mountain biking enthusiasts. A comfortable, efficient mountain bike: 120 mm RockShox fork to easily overcome obstacles, fork with remote lockout, single chainring and 27.5" double-walled wheels that have been lightened for efficiency.
We've involved mountain bikers at every stage of the design process.
And we hope that the Rockrider ST 900 helps you make the most of your MTB tours.
THE RIGHT SIZE MATTERS!
Now we have 4 sizes available:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85 m and 2.00 m
If you are on the limit between 2 sizes:
Choose the smaller size for easier steering (easier to handle) and comfort (straighter back).
Choose the larger size for easier pedaling with a more stretched-out position (a position more suited to performance).
A LIGHTER, COMFORTABLE AND EFFICIENT FRAME
For less weight and more efficient pedaling, the ST900 frame is made with 6061 aluminum. Thanks to its double-butted front triangle, it is around 300g lighter than the ST 540 frame.
Our designers designed and developed it to be comfortable and easy to pilot. The CGF Geometry helps to keep your back straighter, with a lower bottom bracket provides more stability during turns.
ROCKSHOX FRONT SUSPENSION
The 120 mm Rockshox 30 Silver Air hydraulic fork is around 400g lighter than that of the ST 540 bike, Its tapered steering tube brings more stiffness and precision when steering.
The bounce and stiffness of the fork are adjustable, combined with our exclusive COMBO LOCK lockout system, you can even remote to lock or unlock the suspension without moving hands away from the handlebars.
FULL SRAM SX EAGLE TRANSMISSION
This bike equipped with the NEW Sram SX Eagle transmission system.
The 1by design is very easy to use, and save you more focus on the riding, with the 11-50T cassette, you are empowered to conquer the steeper mountain roads
STEM, HANDLEBAR AND GRIPS
With our exclusive design, you can easily adjust the handlebar height according to your needs, the combo of the stem and the spacer provide 5 different stacks to choose.
For the handlebar, we choose the 680mm wide with a slightly raised angle that can satisfy most riders, BTWIN ergonomic grips for great grip and a comfortable feel.
COMFORTABLE AND QUICKLY ADJUSTABLE SADDLE
The saddle is also our exclusive design with an ergonomic shape, the hammock-like structure is very comfortable for long-distance riders, the 27.2mm diameter aluminum seatpost also contributes a bit flexibility to its increased level of comfort.
Quick and easy tool-free adjustment of your saddle height using the adjustment lever on the seat post clamp.
NEW HYDRAULIC DISC BRAKES
We equipped this bike with a TKD88 Hydraulic brake, it is an upgrade from TKD32, New lever design brings you more braking performance even through the muddy condition.
Lightweight, stiff, and durable wheelset
28 spokes, double walls, sleeved rims, combined with the Maxxis tyres, the wheelset is lightweight, stiff, and durable.
Tubeless Ready rims, so it is possible if you wanna upgrade to tubeless ready tyre.
EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE
Not all rides start on your doorstep. This is why we've made it easy to remove and attach the front and rear wheels. They are equipped with a quick-release system.
A bike carrier will make your life easier if you want to avoid dirtying your car.
Warranty
Lifetime warranty for Frame, 2years warranty for spare parts.
