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Air shock & hydraulic disc brakes

  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
  • 15 - Cycling Cycling - 27.5
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15 - Cycling

ROCKRIDER 27.5" Mountain Bike ST 540 S - Blue/Orange

ROCKRIDER
5/5
User rating
Decathlon
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Our team has developed this 27.5" fully suspended MTB with hydraulic disc brakes for your mountain bike touring in all kinds of weather, for rides of 2-3 hours. Control your trajectory even better with the fully suspended ST 540 S. 120mm fork, air shock, hydraulic brakes, and 27.5" double-walled wheels for guaranteed comfort with a sporty ride!
 

PRODUCT BENEFITS

Cycling comfort Enjoy the raised position, adjustable stem, 120mm suspension and hammock saddle
Efficiency Ride efficiently with the 27.5" wheels, 18 speeds and light tyres.
Directional control Manage your path: hydraulic fork and brakes, tyres and wide handlebars.
Ease of use Lock the fork with a simple motion and effortlessly adjust the saddle.
Lifetime warranty Rockrider provides a lifetime guarantee for the frame, stem and handlebars.

TECHNICAL INFORMATION

WHAT OUR TEAM HAS TO SAY

Our passionate MTB team has fully designed and developed the ST 540 S mountain bike at the B'Twin Village in France (Lille). A comfortable, efficient mountain bike: more progressive, powerful hydraulic disc brakes, air shock and 120mm fork to easily travel over obstacles, simple, effective double chainring.
MTBers have been involved at every stage of this bike's development process.
And we hope that the Rockrider ST 540 S helps you make the most of your MTB tours.

A UNISEX MOUNTAIN BIKE

Men's or women's mountain bike?
This Rockrider ST 540 S is unisex.
For greater comfort, the women on our mountain bike team recommend replacing the saddle with the Women's 500 Sport saddle, which is adapted to women's bodies.

HOW TO CHOOSE YOUR ST 540 S MOUNTAIN BIKE SIZE

Several sizes available:
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 on the limit 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).

A COMFORTABLE, PLAYFUL FRAME

For less weight and more efficient pedalling, the Rockrider ST 540 S frame has been designed with 6061 aluminium (only 2.7 kg in size M without suspension). Its 120mm rear shock uses a single-pivot system (more sensitive to small impacts, while remaining firm in the face of large impacts) and sealed bearings for a great lifespan.

THE FRONT 120MM SUSPENSION

Confront all obstacles with the hydraulic fork. Its 120 mm travel allows you to calmly move over more obstacles (roots, pebbles, stones, mud).
Steer a precise path with the higher diameter dampers (32 mm).
The fork's built-in lockout system helps to prevent bobbing and loss of speed on faster terrain.

REAR AIR SHOCK

This bike has a light 120 mm X-FUSION E1 air shock that has been specially adapted to fit this frame. You can easily adjust it based on your weight using the Schrader valve, which creates a very good balance between sensitivity and performance.
A specific "high pressure" pump is required to adjust this shock (Rockrider fork and shock pump - ref: 3310286).

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

HANDLEBARS, STEM, GRIPS

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

COMFORTABLE, SPORT SEAT POST AND SADDLE

Our teams have conceived and designed an exclusive ROCKRIDER ERGOFIT Evo saddle. Designed for all hip widths, its hammock shape is very comfortable for long sports rides. Aluminium Rockrider Sport seat post combining lightness with plenty of adjustment, with a 31.6 mm diameter and 400 mm long.
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 & TYRES FOR DRY TERRAIN

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 their 28 spokes, they are lightweight, stiff, and durable.
The wide, exclusive ROCKRIDER ALL CONDITIONS LIGHT 27.5"x2.1 tyres have side knobs for all terrains (dry, damp, etc.).
Tubeless Ready rims: you will need rim tape, specific valves and sealant.

FLAT PEDALS

The ST 540 S is supplied 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

Not all rides start on your doorstep. This is why we've made it easy to remove and attach the front and rear wheels. They are equipped with a quick-release system.
A bike carrier will make your life easier if you want to avoid dirtying your car.

ACCESSORIES

Your ST 540 mountain bike is supplied with a bell, lights, wheel reflectors and pedals.
The frame is compatible with:
-front and rear mudguards
-bottle cage
-saddle bag
-rear pannier rack
etc.

COMFORT & SAFETY

On your first few rides, the equipment on your bike may shift a little (chain, derailleur, brakes, etc.). We offer a free inspection in the 6 months following purchase. Our technicians will carry out a 13-point check of your bike. Visit your nearest Decathlon workshop and our after-sales website:
https://support.decathlon.fr/

Weight

M - 165-174cm: 14.45 kg
L - 175-184cm: 14.55 kg
XL - 185-200cm: 14.65 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 Your bike's weight may vary due to tolerances in the components. To make your wheels last longer, we recommend not exceeding the maximum weight of 120kg (rider with mountain bike).
To find out more about using and maintaining the Suntour fork, please visit the Suntour website:
http://www.srsuntour-cycling.com/service/download-area/consumer-downloads/bike/owners-manuals/general-fork-manual/

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, handlebars). Availability of spare parts: 2 years.
 

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