Rockrider 540 mtb red



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All new 27.5" MTB fully designed and exclusively produced by b'Twin. This great value 650b hardtail MTB with a lifetime warranty.
This all new Rockrider 540 model is packed with so many great features and market leading specification: 100mm hydraulic​ forks with lockout, 27 speed SHIMANO Altus gears, HAYES Radar hydraulic discs.

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Cycling comfortMore fluid 100 mm hydraulic fork. Ergonomic saddle. Height-adjustable stem.
EfficiencyShimano Altus 27 speeds. Lightweight, fast rolling tyres. Fork with lockout.
PrecisionHydraulic disc brakes.Tyres made of soft rubber. Wide pedals with a strong grip.
Ease of useLockout your fork in a single step. Ergonomic built-in seat clamp.
Lifetime warrantyB’Twin provides a lifetime warranty on the frame, stem and handlebar.
Warrantylifetime warranty​ on the frame, stem and handle bars.
Technical Information

B'Twin Flat Evo VP resin pedals: both sturdy and lightweight. A large pressure surface area for more power while pedalling and better steering of your mountain bike. More aggressive pins for better contact between the foot and the pedal.
Exclusive B'Twin Upside Down 0/30 stem in aluminium for less weight. 80 mm (size M) and 90 mm (size L or XL): shorter provides more precise steering. Can be raised by up to 3 cm with 5 adjustment positions (+0 mm, + 7.5 mm, + 15 mm, + 22.5 mm and + 30 mm). Is 15% stiffer thanks to its width being increased by 48%, providing more precise steering.
Hayes Radar hydraulic disc brakes on front and rear: more powerful and progressive braking even in rain and muddy conditions, with only minimal pressure on the levers required.
Suntour XOR 100 fork with 100 mm travel. Fork stiffness can be adjusted (more/less). Fork lockout to prevent bobbing on faster terrain.
Prowheel Flint 401 triple-chainring chainset (22/32/44 teeth). Shimano Altus 9-speed rear derailleur. Microshift front derailleur. Shimano Altus M370 shifters with speed indicators. Shimano cassette with 9 cogs and 11-34 teeth.
14.1 kg in size M without pedals
B'Twin Sport handlebar in aluminium for less weight. 660 mm (size M) and 680 mm (size L or XL): wider for extra stability. Oversize diameter for added stiffness.
Rockrider CGF Evo (Comfort Geometry Frame) in 6061 aluminium. For 27.5" wheels with a comfortable position thanks to a raised steering centre. Seat is 5 times more flexible than a standard frame thanks to a narrow 27.2 mm seat post. Low crankset: Mountain bike keeps stable in turns and easy to place one's foot on the ground thanks to an open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheel base: bike is easy to turn.
Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tyres. A system of lugs specially designed for all-terrain use on any type of surface. Lighter tyre sidewalls to reduce the effect of rotating mass. Includes a pressure guideline chart based on rider weight.
B'Twin Sport seat post in aluminium for less weight. 27.2 mm diameter provides the seat with a natural flex that's 5 times greater than that of a classic seat post. 400 mm long, offering a wide adjustment range.
Exclusive Sport 500 saddle offers exceptional comfort thanks to its wider "hammock" shape and wide distribution of the pressure points regardless of width of the rider's pelvis.
Semi-integrated Aheadset offers improved watertightness, more precise steering, and an integrated look. B'Twin Sport handles with grooves, 120 mm long: true riding comfort.
1) The components seen on the bicycle in the videos may change from the actual product. 2) The bicycle will be delivered in 85% assembled condition. The directions for the cycle assembly will be given in the box and also sent via mail ( if you have subscribed). The tools for assembly are provided with the cycle. 3) The 3-month, free cycle check up is valid if the user is able to take the bicycle to a decathlon workshop.
If you will need a spare part​ to be replaced, we have it all at our workshop. You will have to drop by our workshop to get your cycle serviced.
Information / Concept / Technology
Stockage tips
Please store the cycle in a cool and dry place away weathering agents like the sun and rain. Always keep the tyres inflated.