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27.5" wheels, double disc brakes, 24 speeds.

  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
  • 15 - Cycling Cycling - Rockrider 520 Mountain Bike, 27.5
15 - Cycling

B'TWIN Rockrider 520 Mountain Bike, 27.5" - Grey

B'TWIN
Designed for regular, moderate intensity mountain bikers looking for thrills! Raised position, stem can be raised up to 3 cm, ergonomic saddle: comfort that also yields greater efficiency. 27.5" wheels, double disc brakes, 24 speeds: it's got it all!

Colour : DARK GREY / LIGHT GREY / Fluo lime yellow

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Reference : 8378535
 
PRODUCT BENEFITS
Cycling comfort Raised position. Ergonomic saddle. Height-adjustable stem. Soft-touch grips.
Efficiency CGF Evo aluminium frame. 24-speed SRAM X3. Light 27.5" Aero Trail Evo wheels.
Precision Double disc brakes. Easy-to-handle geometry. Tyres have good grip in turns.
Ease of use Innovative fork with easy adjustment based on rider's weight.
Lifetime warranty B’Twin provides a lifetime warranty on the frame, stem and handlebar.
TECHNICAL INFORMATION
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: http://www.btwin.com/en/home

Frame

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.

Front suspension

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.
Equipped with a mechanical spring and elastomer stoppers for maximum reliability and minimum maintenance.

Rear suspension

No rear suspension.

Drive train

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

Handlebar / stem / steering / grips

B'Twin Sport Oversize aluminium handlebar; 660 mm (size S and M), and 680 mm (L and XL).
Exclusive B'Twin aluminium stem, 70 mm (size S), 80 mm (sizes M/L), and 90 mm (size XL).
Stem can be raised by up to 3 cm, with 5 settings (+ 0 mm, + 7.5 mm, + 15 mm, +22.5 mm, +30 mm).
Semi-integrated A-headset headset—better sealed and integrated style.
B'Twin Sport handles with grooves, 120 mm long: genuine comfort while riding.

Wheels

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.

Tyres

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 turns. Also includes a chart showing recommended pressure levels depending on the rider's weight (see markings on tyre sidewalls).

Saddle / seat post

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.

Pedals

Bike comes with MTB platform pedals with bearings, made from hard resin for lower weight and greater safety (less aggressive in case of pedal that slips).

Weight

14.35 kg in S without pedals.
14.45 kg in M without pedals.
14.55 kg in L without pedals.
14.70 kg in XL without pedals.

Accessories

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

Sizes

S: 1.50m to 1.65m
M: 1.65m to 1.75m
L: 1.75m to 1.85m
XL: 1.85m to 2.00m

COMPOSITION / ADVICE
Composition
Frame
100.00% Aluminium 6061
Stock advice Store in a cool, dry place, away from corrosive products and salty air.
Restricted use : Not suitable for All Mountain, Enduro, BMX
OUR COMMITMENTS
The Mission Test test users in the Lyon mountains, in May 2015.
Test Product We also recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.
Guarantee : Lifetime (frame, stem, handlebars). Details on btwin.com. Availability of spare parts: 2 years.
 
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