Rockrider 520 MTB Cycle Black



Made for

The 27.5" MTB. Designed around the 650b format, this b'Twin Evo alloy frame delivers great performance at a good price.
Hayes MX5 disc brakes, full SRAM 24 speed groupset, double walled aero 650b wheels and adjustable Suntour XCT forks lets you glide over rough terrain and stop with ease in all weather conditions.

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EfficiencyCGF Evo aluminium frame. 24-speed SRAM X3. Light 27.5" Aero Trail Evo wheels.
Cycling comfortRaised position. Ergonomic saddle. Height-adjustable stem.Soft-touch grips.
PrecisionDouble disc brakes. Easy-to-handle geometry. Tyres have good grip in turns
Ease of useFork and tyres can be easily adjusted to the rider's weight.
Lifetime warrantyB’Twin provides a lifetime warranty on the frame, stem and handlebar.
WarrantyLifetime warranty on the frame, Handle bar and stem.
Technical Information

27.5 inches
14.7 kg in M without pedals
Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminium frame for 27.5" wheels. Comfortable seating position thanks to raised steering. Seat is 5 times more flexible than a standard frame thanks to a narrow 27.2 mm seat post. Low bottom bracket: helps keep the mountain bike stable in turns, and makes it easier to place foot on the ground. Open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheel base: bike is easy to turn.
B'Twin U-Fit 80 fork, with 80 mm of travel and an innovative fork stiffness adjustment based on the rider's weight (55 to 105 kg). Durable thanks to the materials and fabrication processes used
No rear suspension.
SRAM S200 triple-chainring chainset (22/32/42 teeth). SRAM X3 8-speed rear derailleur. Microshift MS22 front derailleur. SRAM X4 shifters with speed indicators. SRAM PG820 cassette, 8 cogs, 11 to 32 teeth.
Tektro aluminium brake levers: lightweight and precise. Front and rear Hayes MX5 mechanical disc brake callipers: powerful, progressive braking, even in rainy and muddy conditions.
B'Twin Sport handlebar in aluminium for less weight. 660 mm (sizes S and M), and 680 mm (sizes L and XL): wider for extra stability. Oversize diameter for added stiffness.
Exclusive B'Twin Upside Down 0/30 aluminium stem (lower weight). Lengths: 70 mm (S), 80 mm (M and L), 90 mm (XL): shorter for more precise steering. Can be raised by up to 3 cm with 5 settings (+ 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.
Semi-integrated Aheadset headset for improved precision steering, and an integrated look. B'Twin Sport handles with grooves, 120 mm long: genuine comfort while riding.
Exclusive B'Twin Ergofit Evo saddle offers outstanding comfort thanks to its wider "hammock" shape and good distribution of pressure points regardless of the rider's pelvis width.
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 a classic seat post. 400 mm long, offering a broad adjustment range.
Aero Trail Evo wheels with double-walled rims: lightweight, stiff, and durable. 27.5" diameter: the best balance of comfort and performance. Designed with 28 spokes to reduce weight while still guaranteeing rigidity and strength.
Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tyres with a central tread specially designed for fast performance. Side lugs provide traction in the turns. Also includes a chart showing recommended pressure levels depending on the rider's weight.
B'Twin Flat platform resin pedals.
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 sent via mail ( if you have subscribed). The tools for assembly are provided with the cycle only for online buyers. 3) The 3-month, free check up is valid only if the user is able to take the bicycle to a decathlon workshop.4) All bicycle accessories need to be purchased separately.
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
Store the cycle in dry places away from rain and sunlight. Keep the tyres always inflated.



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It is very. ....nice
Used for 1 week or less
This product is very supper
execellent bike
Used for 1 week or less
every thing is Good but Old model rockrider 520 is much better than this one,they have 9 gears and mineral oil disc brakes and almost equal to rockrider 540 specifications..but anyway you can go for this one too... amazing experience and daily i`m cycling appx 18 kms. Love it
I loved it
Used for 1 week or less
BTWIN Rockrider is rock
In love with my Bike
Used for 3 to 6 months
Superb one...
Crazy to find off-road routes and this bike will never let you down...
Smooth Gear Shifters
Front Suspension excellent...
Newbies can easily make 50+ kms
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