Decathlon Rockrider ST520, 21 Speed Mountain Bike, 27.5″, Gray, Small

Product details

The RockRider 520 was designed and created in Suzhou, China, by a team of experts and cycling enthusiasts dedicated to designing our MTB Sport Touring line. Production was also done near Suzhou to be as close to our Decathlon stores as possible. Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminum frame for 27.5″ wheels. Comfortable seating position thanks to raised steering. The seat is 5 times more flexible than a standard frame thanks to a narrow 1.07-in. seat post. Low bottom bracket: helps keep the mountain bike stable in turns, and makes it easier to place a foot on the ground. Open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheelbase: bicycle is easy to turn. We offer a lifetime warranty on the Bike’s frame, stem, and handlebar. This Bike does not come included with a Kickstand or a Bottle cage.
SRAM S200 triple-chainring chain set (22/32/42 teeth). SRAM X3 8-speed rear derailleur. Micro shift MS22 front derailleur. SRAM X4 shifters with speed indicators. SRAM PG820 cassette, 8 cogs, 11 to 32 teeth.
Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminum frame for 27.5″ wheels. Comfortable seating position thanks to raised steering. The seat is 5 times more flexible than a standard frame thanks to a narrow 1.07-in. seat post. Low bottom bracket: helps keep the mountain bike stable in turns, and makes it easier to place a foot on the ground.
Open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheelbase: bicycle is easy to turn.
B’Twin U-Fit 80 fork, with 3.15 in. of travel and an innovative fork stiffness adjustment based on the rider’s weight (121 to 230 lbs.). Durable thanks to the materials and fabrication processes used.
Equipped with a mechanical spring and elastomer stoppers for maximum reliability and minimum maintenance.
No rear suspension.
The bicycle comes with mountain bike platform pedals with bearings, made from hard resin for lower weight and greater safety (less aggressive in case of pedal that slips).
Aero Trail Evo aluminum 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 ensuring rigidity and strength.
Exclusive B’Twin All Terrain Dry 27.5″ x 2.0 tires with a central tread specially designed for fast performance. Side lugs provide traction in turns. Also includes a chart showing recommended pressure levels depending on the rider’s weight (see markings on tire sidewalls).
B’Twin Sport Oversize aluminum handlebar; 25.9 in. (Size S and M), and 26.7 in. (L and XL). Exclusive B’Twin aluminum stem, 70 mm (size S and M), and 80 mm (size L). Stem can be raised by up to 1.2″, with 5 settings (+0″, +0.3″, +0.6″, +0.9″, +1.2″). Semi-integrated A-headset—better sealed and integrated style.
B’Twin Sport handles with grooves, 4.72 in. long: genuine comfort while riding.
Raised position. Ergonomic saddle. Height-adjustable stem. Soft-touch grips.