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MEN SPORT TRAIL MTB BIKE

ROCKRIDER ST 540 Mountain Bike, Grey/Red - 27.5"

ROCKRIDER
4.4/5

Colour : BLACK / FLUO RED

User rating
Decathlon
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Ideal for cross-country and trail riding, the updated Rockrider ST540 mountain bike is a 27.5-inch hardtail with an SRAM/Shimano 2 x 9 drivetrain, Suntour XCE 100mm travel front forks (with lockout) and powerful hydraulic disc brakes. Married onto the strong double-walled rims, the 27.5 x 2.2 tyres are both grippy and lightweight.
  • Comfortable raised position and hammock saddle
  • 27.5-inch wheels and 18 speeds
  • Lifetime warranty on frame, stem and handlebars
Not Available Now

We currently have limited capacity to build bikes in our warehouse. Due to this, we are limiting the number of bikes we sell per day. If you are unable to process your order at checkout, please return the following day to make your purchase.

 
 

Product benefits

Cycling comfort Enjoy the raised position, adjustable stem, 100mm suspension and hammock saddle
Directional control Control your trajectory: hydraulic disc brakes, wide tyres and handlebar.
Efficiency Ride efficiently thanks to 27.5" wheels, 18 speeds and light tyres.
Ease of use Lock the fork in one quick step, and adjust the saddle effortlessly.
Lifetime warranty Rockrider provides a lifetime warranty on the frame, stem and handlebar.

Technical Information

WHAT SIZE MOUNTAIN BIKE TO CHOOSE?

Several sizes available:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85 m and 2.00 m
If you are between 2 sizes:
Choose the smaller size for easier steering (easier to handle) and comfort (straighter back).
Choose the larger size for easier pedalling with a more stretched-out position (position more suited to performance).

UNISEX FRAME

With a heavily sloped top tube and a wide range of sizes (from S: 1.50m to XL:2.00m).
The ST 540 mountain bike frame is UNISEX.
The ST 540 mountain bike is available with the same frame in a WOMEN'S version: fitted seat, narrower handlebar, shorter stem, fork with a more flexible spring, and brake levers that are closer together.
As a WOMAN, if you choose the MEN'S model, we recommend at least purchasing the WOMEN'S SPORT 500 saddle which is fitted to the female form.

A WORD FROM THE TEAM

The ST 540 mountain bike was fully designed and developed by our passionate MTB team at the B'Twin Village in France (Lille).
A comfortable, efficient mountain bike: more progressive, powerful hydraulic disc brakes, 100mm travel in the fork to easily ride over obstacles, and simple and effective double chainring,...
MTBers have been involved at every stage of this bike's development process.

A COMFORTABLE, PLAYFUL FRAME

For less weight and more efficient pedalling, the Rockrider ST 540 MTB frame is made from 6061 aluminium (only 2.1 kg in size M).
Our designers created this bike to be comfortable and easy to manoeuvre. Its slope has been designed to keep your back straighter. The lower bottom bracket helps keep you more stable during turns.

100 MM FRONT SUSPENSION

Ride over obstacles with the hydraulic fork. Its 100 mm travel allows you to calmly overcome more obstacles (roots, pebbles, stones, mud).
Its built-in lockout system helps to prevent bobbing and loss of speed on faster terrain.

REAR SUSPENSION: NONE

This mountain bike has no rear suspension. It is a "semi-rigid" mountain bike.
Compared to a full suspension mountain bike (with rear suspension), the advantages are clear: this mountain bike is lighter; less energy is lost on flatter ground. If however your primary concern is comfort and manoeuvrability, the ST 540 is available in a full suspension version with suspension at the rear.

DOUBLE CHAINWHEEL DERAILLEUR AND DRIVETRAIN

2 9-speed chainwheels for 18 easy-to-use speeds.
The thru-axle bottom bracket is very stiff and long-lasting.
In detail:
-SHIMANO Altus 22 and 36 tooth double chainring
-MICROSHIFT FD-M462 front derailleur
-SHIMANO Altus rear derailleur
-SHIMANO Acera shifters with speed indicators
-MICROSHIFT H092 9-cog 11 to 36 tooth cassette
-KMC X9 chain

HANDLEBAR, STEM, GRIPS

The adjustable stem brings the ST 540 controls to your hands. The all-aluminium ROCKRIDER stem is 70 mm (size S), 80 mm (size M/L), or 90 mm (size XL) and can be raised to 5 adjustment intervals: + 0mm, + 7.5mm, + 15mm, + 22.5mm, + 30mm.
In detail:
- 720mm oversize ROCKRIDER SPORT aluminium handlebar
- ROCKRIDER SPORT "soft touch" ergonomic grips for good grip and a comfortable feel.

SADDLE

Our teams designed and created an exclusive ROCKRIDER ERGOFIT Evo saddle.Designed for all hip widths, its hammock shape is very comfortable for long, athletic rides. The Flex 27.2mm diameter aluminium seatpost also contributes to its increased level of comfort.
Quick and easy tool-free adjustment of your saddle height using the adjustment lever on the seat post clamp.

HYDRAULIC DISC BRAKES

No matter what conditions you ride in (dry/wet), the Rockrider by Tektro 160mm double hydraulic disc brakes will come through for you, even in the mud.
Hydraulic braking adds more power and progressive braking and requires less powerful use of the brake levers.
The aluminium brake levers are easy to grip, lightweight, and precise.

27.5" WHEELS WITH DOUBLE-WALLED RIMS AND ALL-CONDITION TYRES

The aluminium wheels are effective and sturdy: 27.5" diameter and double-walled rims. Their diameter is the perfect balance between comfort and performance. With 28 spokes, they are lightweight, stiff, and durable.
The exclusive ROCKRIDER ALL CONDITIONS LIGHT 27.5"x2.1 60 TPI wide tyres have side knobs designed for riding on all types of terrain (dry, wet, etc.).
Tubeless Ready 23 mm rims: you will need rim tape, Schrader valves, and puncture sealant.

PLATFORM PEDALS

The ST 540 comes with Rockrider Flat platform pedals with a wider pedalling surface and more pronounced dots for better grip on the pedal.

EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE

We added a quick release system for easily removing/reattaching the front wheel.
Our advice: a bike rack is an easy way to transport your mountain bike without dirtying your car.

ACCESSORIES

Your ST 540 mountain bike is fitted with a bell, lights, wheel reflectors and pedals.
The frame is compatible with:
- Front and rear mudguards
- Stand
- Bottle cage
- Saddle bag
- Rear pannier rack
- Child seat
etc.

COMFORT & SAFETY

Your bike's fittings (chain, derailleur, brakes, etc.) will adjust over time. Take advantage of a free servicing within 6 months after purchase. Our technicians will carry out a 13-point check of your bike. Just come to your nearest Decathlon workshop with your Decathlon card and/or receipt.

LEGAL DISCLAIMER

To ensure components last longer, we recommend a maximum load of 120 kg (rider and MTB included).

Weight

S - 155-164cm: 13.5 kg
M - 165-174cm: 13.95 kg
L - 175-184cm: 14.05 kg
XL - 185-200cm: 14.2 kg
Weight without pedals.

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Composition / advice

Composition
Frame (for bike)
100.00% Aluminium 6061
Stock advice After washing, rub with a dry cloth to remove all traces of moisture. Store your mountain bike in a cool, dry place, away from corrosive products and salty air.
Restricted use : Not suitable for XC, All Mountain, Enduro and BMX.
Legal notice To ensure components last longer, we recommend a maximum load of 120 kg (rider and MTB included).
How to maintain and repair your product

Our commitments

Test Product Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.
Guarantee : Lifetime (frame, stem, handlebar). Availability of spare parts: 2 years.
 
 

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