27.5" wheels, dual disc brakes., 24-speed.

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Design

The ROCKRIDER 520 was designed and created in France, at the B'Twin Village in Lille, by a team of experts and cycling enthusiasts dedicated to designing our mountain bike Sport Touring line.
Production took place in different factories in Europe as close to our Decathlon stores as possible.
More information available on our website: www.btwin.com

Frame

Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminum 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 1.07-in. 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: bicycle is easy to turn.

Front suspension

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.

Rear suspension

No rear suspension.

Drivetrain

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.

Brakes

Tektro aluminum brake levers: lightweight and precise.
Front and rear Hayes MX5 mechanical disc brake calipers: powerful, progressive braking, even in rainy and muddy conditions.

Handlebar/stem/steering/grips

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, 2.75 in. (Size S), 3.15 in. (sizes M/L), and 3.54 in. (size XL).
Stem can be raised by up to 1.18 in., with 5 settings (+ 0 in., + 0.29 in., + 0.59 in., + 0.89 in., + 1.18 in.).
Semi-integrated A-headset—better sealed and integrated style.

B'Twin Sport handles with grooves, 4.72 in. long: genuine comfort while riding.

Wheels

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.

Tires

Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tires with a central tread specially designed for fast performance. Side lugs provide good grip in turns. Also includes a chart showing recommended pressure levels depending on the rider's weight (see markings on tire sidewalls).

Saddle / seat post

Exclusive B'Twin Ergofit Evo saddle offers outstanding comfort thanks to its wider "Hammock" cut and good distribution of pressure points regardless of the rider's pelvis width. B'Twin Sport seat post in aluminum for less weight.
1.07-in. diameter provides the seat with a natural flex that's 5 times greater than a classic seat post.
15.75 in. long, offering a broad adjustment range.

Pedals

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).

Weight

31.63 lbs in S without pedals.
31.85 lbs in M without pedals. 32.07 lbs in L without pedals.
32.40 lbs in XL without pedals.

Accessories

Frame can take a bottle cage, saddle bag, mud guard, stand, pannier rack.

Product Testing

We also recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.

SIZE

S/M/L/XL

WEIGHT

31.85lbs in M (no pedals)

WHEEL SIZE

27.5 inches

Life warranty

frame, handlebar and stem

Composition

Frame : 100.0% Aluminium 6061

Restrictions

Not suitable for All Mountain, Enduro, BMX.

Storage Instructions

Store in a cool, dry place, away from corrosive products and salty air.

Warning for California customers

Learn more

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Raised position., stem can be raised up to 1.18 in., ergonomic saddle: comfort that also yields greater efficiency. 27.5" wheels, dual disc brakes., 24-speed: It has it all!