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ST 540 S 27.5" Mountain Bike - Red

Regular Price: € 550.00 -33%

€ 370.00

Designed for mountain bike touring. Have fun exploring new playgrounds.

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SKU: S120391 / 2168390 / 8379042
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Delivery in 4 to 5 days
Product benefits Designed for mountain bike touring. Have fun exploring new playgrounds.
  1. Cycling comfort
    You'll love the double 120mm suspension, adjustable stem & hammock saddle.
  2. Efficiency
    Ride efficiently with the 27.5" wheels, 27 speeds and light tyres.
  3. Directional control
    Manage your path: hydraulic disc brakes, wide pedals and tyres.
  4. Ease of use
    Lock the fork with a simple motion and effortlessly adjust the saddle.
  5. Lifetime warranty
    ROCKRIDER offers a lifetime warranty on the frame, handlebars and stem.
Product feature
  1. 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). We've designed and tested the ST 540 S to be both comfortable and great for sport. This combines to give MTBers confidence to overcome any new obstacle. We have involved real MTBers at every stage of this bike's design process. And we hope the that Rockrider ST 540 S is everything you could hope for to give you excellent MTB rides.
  2. 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. A range of Rockrider mountain bikes specifically designed to fit female morphology is also available (specialised saddle, stem, fork and brake grips).
  3. HOW TO CHOOSE YOUR ST 540 S MOUNTAIN BIKE SIZE
    Several sizes available: M: between 1.60 m and 1.75 m L: between 1.75m and 1.85m XL: between 1.85 m and 2 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).
  4. A COMFORTABLE, PLAYFUL FRAME
    We've used 6061 aluminium for this Rockrider Sport frame for greater lightness. The result: only 2.7 kg in size M (without shock). Its 120mm rear shocks rest on a monopivot system (more sensitive to small impacts on terrain, while remaining firm during large impacts) and on sealed bearings for a great lifespan.
  5. THE FRONT 120MM SUSPENSION
    Easily surmount all obstacles (roots, pebbles, stones, etc.) with the SUNTOUR XCR hydraulic fork and its 120 mm travel. Steer a precise path with the higher diameter dampers (32 mm). Built into the right damper, its quick-release system helps prevent bobbing on smooth sections.
  6. THE REAR SUSPENSION: AIR SHOCK
    Our designers equipped the ST 540 S MTB with an X-Fusion E1 air shock, lightweight and specifically adjusted to 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 (B'Twin fork and shock pump - ref: 3310286).
  7. TRIPLE CHAINWHEEL DRIVETRAIN AND DERAILLEUR
    3 9-speed chainwheels, or a wide range of 27 speeds! 2 quick and easy shifters on the handlebar. Left (chainwheels): control ascents/descents. Right (speeds): more precise control over your pedalling In detail: - Triple chainwheels - 22, 32 and 42 teeth - SHIMANO ALTUS front derailleur - SHIMANO ALTUS rear derailleur - SHIMANO ALTUS M370 shifters, with speed indicators - SHIMANO HG 200 9-cog cassette, 11 to 34 teeth
  8. HANDLEBARS, STEM, GRIPS
    With its adjustable stem, the ST 540 S controls are close at hand. The all-aluminium B'Twin stem is 80 mm (size M/L), or 90 mm (size XL) and can be raised using 5 adjustment intervals: + 0 mm, + 7.5 mm, + 15 mm, + 22.5 mm, + 30 mm. In detail: - Aluminium B'TWIN SPORT "oversize" handlebars are 660 mm (size S and M) or 680 mm (for L and XL) wide - B'TWIN SPORT "soft touch" grips for a good grip and comfortable feel
  9. COMFORTABLE, SPORTY SADDLE/SEAT POST
    Our teams have conceived and designed an exclusive B'Twin Ergofit Evo saddle. Designed for all hip widths, its hammock shape is very comfortable for long sports rides. With a 31.6 mm diameter and 400 mm long, the aluminium B'TWIN SPORT seat post combines low weight and a wide range of adjustments for a more raised riding position. Quick and easy tool-free adjustment of your saddle height using the adjustment lever on the seat post clamp.
  10. DOUBLE HYDRAULIC DISC BRAKES
    The B'Twin by Tektro 160mm front and rear double hydraulic disc brakes will do the job, 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.
  11. 27.5" DOUBLE-WALLED RIMS & ALL TERRAIN TYRES
    Take on obstacles! The aluminium Aero Trail Evo wheels are robust and effective: 27.5" double-walled rims. Their diameter is the perfect balance between comfort and performance. With their 28 spokes, they are lightweight, stiff, and durable.The exclusive 27.5" x 2.2 B'TWIN ALL TERRAIN LIGHT tyres are lighter weight and have lugs that are specially designed for all-terrain rides. Their 2.2 width ensures more traction on technical sections.
  12. PLATFORM PEDALS
    The ST 540 S comes with B'TWIN FLAT EVO resin pedals: both sturdy and lightweight. They are wider for more power when pedalling, and the studs are more prominent for a better grip on the pedal.
  13. EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE
    Not all rides start on your doorstep. Need to remove the front wheel? It's easy thanks to the integrated clamping lever. And the rear wheel? There is a nut at the back to secure the bike and limit the risk of theft. A flat spanner is needed to remove the rear wheel.
  14. ACCESSORIES
    Your ST 540 mountain bike is supplied with a bell, lights, wheel reflectors and pedals. The frame is compatible with: - Mudguards attached to the diagonal tube on the frame and the seat post - Adjustable height seat post. - Stand - Bottle cage (550ml bottle) - Saddle bag - Rear pannier rack etc.
  15. OUR ADVICE FOR YOUR FIRST FEW RIDES
    During your first few rides, your bike's equipment will adjust (chain, derailleur, brakes, etc.) We offer a free servicing within 6 months following purchase. Our technicians will provide a 13-point inspection of your bike. Access all our advice on handling your bike: https://support.decathlon.fr/velos-tout-terrain-vtt-fr-tp_19822
  16. Accessories
    Your RR540 S mountain bike comes with a bell, lighting, wheel reflectors, and pedals. The frame is compatible with: - Mudguards attached to the diagonal tube on the frame and the seat post - Adjustable height seat post. - Stand - Bottle cage - Saddle bag - Rear pannier rack etc.
  17. OUR ADVICE FOR YOUR FIRST RIDE
    During your first few rides, your bike's equipment will adjust (chain, derailleur, brakes, etc.) We offer a free servicing within 6 months following purchase. Our technicians will provide a 13-point inspection of your bike. Access all our advice on handling your bike: https://support.decathlon.fr/velos-tout-terrain-vtt-fr-tp_19822
Product testing
  1. Composition
    Frame (for bike) : 100.0% Aluminium 6061
  2. Storage 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.
  3. Product restrictions
    Not suitable for XC, All Mountain, Enduro and BMX.
  4. Product information
    Control your trajectory even better with the fully suspended ST 540 S. 120mm fork, air shocks, hydraulic brakes, and 27.5" double-walled wheels... guaranteed comfort with a sporty ride!
  5. Lab tested
    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.