ROCKRIDER

Rockrider ST 540 27.5 Mountain Bike 9sp - Blue

Reference. 8550613

$499.00

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Sport Trail Mountainbiking

Mid-level Sport Trail mountainbike hardtail

Frame: 100.0% Aluminium

BENEFITS

Cycling comfort

100 mm hydraulic fork (smoother). Ergonomic saddle. Height-adjustable stem.

Efficiency

Shimano 2×9 speeds. Lightweight, fast tyres. Fork with lockout.

Ease of use

2×9 speeds, hydraulic disc brakes, suspension fork

Instructions

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TECHNICAL INFORMATIONS

Design

Entirely designed and developed in France at the B'Twin Village (Lille), this mountain bike is the fruit of the work of an expert team of passionate mountain bikers. Production is done in Suzhou, China by our own factories in order to be as close to the regional Decathlon stores as possible.

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.LIFETIME WARRANTY!

Front suspension

Suntour XCR 100 fork with 100 mm of travel and adjustable stiffness (more/less). Fork lockout to prevent bobbing on faster terrain.

Drivetrain

Dual-chainring Shimano chainset. Shimano Altus 9-speed rear derailleur. Microshift MS25 front derailleur.Shimano Altus M370 shifters with speed indicators.Shimano HG200 cassette with 9 cogs and 11-34 teeth.

Brakes

Tektro hydraulic disc brakes on the front and rear, with 160 mm discs.Hydraulic brakes are more powerful and progressive, making it easier to apply pressure on the levers.

Handlebar / stem / steering / grips

B'Twin Sport Oversize aluminium handlebar, 660 mm (sizes S and M).Exclusive B'Twin aluminium stem, 70 mm (sizes S and M).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 aluminium 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.

Tyres

Exclusive B'Twin All Terrain Light 27.5" x 2.0 tyres with a system of lugs specially designed for all terrain use on any type of surface.Lighter tyre sidewalls reduce the effect of rotating mass.Chart with recommended tyre pressure based on rider's weight (indicated on the 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

Comes with B'Twin Flat Evo resin pedals: sturdy and lightweight.A large pressure surface area for more power while pedalling and improved directional control of your mountain bike.More aggressive pins for better contact between the foot and the pedal.

Weight

13.50 kg in S without pedals.13.95 kg in M without pedals.14.05 kg in L without pedals.14.20 kg in XL without pedals.

Warranty

Lifetime warranty on manufacturing defects for all metal frames, rigid forks, stems & handlebars 5 years warranty on all carbon frames & forks 2 years warranty on all other parts Excludes damages arising from normal wear & tear, misuse, negligence and unauthorized modifications

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