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W MTB BIKE

ROCKRIDER ST 540 Women's Mountain Bike, Grey - 27.5"

ROCKRIDER
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Decathlon
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Ideal for cross-country and trail riding, the updated Rockrider ST540 women’s 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.
  • Saddle, bars, brakes and stem adapted for women riders
  • 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 and you might not be able to process your order at checkout. The count resets at 11pm every day so that would be the best time to try, although we do have a peak of attempts at this time so we can't guarantee a slot for everyone.

Technical Information

WHAT SIZE MOUNTAIN BIKE TO CHOOSE?

A few tips to choose your size:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75 m and 1.84 m
1/ Sitting on the saddle, you should be able to touch the ground with the tips of your toes.
2/ To adjust the saddle height, your knee should be slightly flexed with your foot on the pedal in the lowest position.
3/ If you're between two sizes, choose the larger size.

THE ROCKRIDER MTB FOR WOMEN

Designed and developed entirely in France at the B'Twin Village (Lille).
The team studied the features of the female form and used this to design and test the ST 540 MTB, involving women mountain bikers at every stage of the process.
Our goal is to make you want to ride and enjoy every single outing on a comfortable and easy-to-ride mountain bike.

A MOUNTAIN BIKE DESIGNED FOR WOMEN

We carried out surveys to create a MTB specially designed for women. These included studies with the Decathlon Sports Lab, and real-world tests with hard-core women mountain bikers. 6 months later, here's the result: a mountain bike with positioning elements adapted for women!
- An ergonomic saddle designed for the female pelvis.
- A fork that can be adjusted to your weight, from 45kg upwards
- Shorter handlebar and a 60 mm adjustable stem
- Grips and brake levers moved closer together

A COMFORTABLE, PLAYFUL FRAME

For added comfort on our ST 540 women's model, our designers created a frame that's easy to get onto. The CGF frame (Comfort Geometry Frame), made of 100% aluminium, provides excellent comfort and manoeuvrability.
The slope is designed to keep your back straighter, so you can ride without neck pain, while the shorter rear bases make the bike more agile in turns.

FRONT SUSPENSION FOR CUSHIONING LUMPS AND BUMPS

Adjust the suspension hardness based on your weight (45 kg on up), to get over roots and stones more easily (UFIT technology exclusively patented by Decathlon). Just turn one dial and you're done! Nice and easy.
Designed for riding on rough terrain, the fork's 100mm travel and the 27.5" wheels allow you to easily ride over most obstacles. The hydraulic disc brakes are powerful and progressive in all weather conditions.

DERAILLEUR & DRIVETRAIN: HOW TO CHANGE SPEEDS

2 9-speed chainrings provide a wide range of 18 speeds that are easier to use.
2 quick shifters that are easy to use: control ascents / descents.
Right (speeds): more precise control over your pedalling.
In detail:
-Double chainring
-Shimano Altus / Acera front derailleur
-SRAM X2 rear derailleur
-SRAM X4 shifters with gear indicators
The axle running through the external bearings ensures excellent rigidity and durability in the long term.

STEM, HANDLEBAR, GRIPS: for comfort

The shorter 60mm aluminium stem, which is specially designed for the female form with a 10° angle, delivers maximum comfort. The 640 mm wide aluminium handlebar provides good control and stability. And the soft touch handles are comfortable to hold and provide good grip.
To adjust the bike to your build, move the spacer (the coloured ring) to adjust the stem's height, or turn it over to raise it.

An ERGONOMIC SADDLE that adjusts in one step.

An exclusive women's "COMFORT PLUS" saddle designed especially for the female pelvis. The wider, hammock-style design is hollowed out in the centre for comfort. Want an even comfier saddle?
Add a saddle cover. Adjust your saddle height quickly and without tools using the quick-adjust lever.

HYDRAULIC DISC BRAKES: GET A GRIP ON YOUR BRAKING

To better fit women's smaller hands, we reduced the distance between the handlebar and the brake by 1 cm. This more responsive position will help you build confidence as you ride. The Tektro aluminium brake levers are easy to grip, lightweight, and precise.
The double hydraulic disc brakes provide powerful, progressive braking at the front and rear. You can brake with just two fingers.
Try to get your brakes adjusted at least once a year.

27.5" WHEELS & TYRES FOR DRY GROUND: READY TO RIDE?

Take on your first obstacles! The AEROTRAIL Evo aluminium wheels are effective and sturdy: 27.5" with double-walled rims. Their diameter offers an excellent balance of performance and comfort. With 28 spokes, they are lightweight, stiff, and durable.
The exclusive B'Twin All Conditions 27.5"x2.2 wide tyres are designed for dry terrain. The side knobs provide grip on turns. The recommended tyre pressure, based on the weight of the rider, is marked on the tyre sidewall.

PLATFORM PEDALS

The women's ST 540 comes with platform MTB pedals mounted on bearings, made from hard resin for light weight and safety. If your foot can slip off the pedal, you're less likely to injure yourself.

EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE

Not all rides start on your doorstep. Need to remove the front wheel?
Simply unscrew the built-in clamping lever.
And the rear wheel? There is a nut at the back wheel to secure the bike and reduce the risk of theft.
You will need a spanner to loosen it (so always carry a multitool in your bag on your rides).
A bike carrier will make your life easier if you want to avoid 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 (add an additional pannier rack for sizes S and M to avoid touching the rear wheel)
etc.

OUR ADVICE FOR YOUR FIRST RIDES

We recommend wearing cropped bottoms or cycling shorts with a pad (foam in the shape of a saddle), or a gel saddle cover, for added comfort while riding. For long rides, it's always a good idea to take something to drink with you (e.g. a hydration bladder or bottle).
Even on short mountain bike rides, wearing a helmet, gloves and goggles, are essential for your safety.

An easy-to-understand MTB with stickers

The stickers, which are resistant to wear, provide hints on how to adjust your bike:
- fork adjustment - tyre pressure and valve type (for the pump) - rim diameter (for inner tubes) - saddle height adjustment. When setting out on an MTB ride, it's handy to have the instructions right there on the bike itself! For other information (washing, chain maintenance, etc.), please refer to our bike care guide.

Weight

S - 155-164cm: 13.55 kg
M - 165-174cm: 13.65 kg
L - 175-184cm: 13.75 kg
Weight without pedals.

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Composition / advice

Composition
Frame
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 exact weight may vary due to the components' tolerances.
The total weight (bike + rider) should not exceed 120kg.

Our commitments

Test Product Our teams of engineers and product heads have all of our products tested by mountain bikers, in real-world conditions. These tests are in addition to our lab tests, and allow us to validate all our products before they are put on the market.
Guarantee : Lifetime (frame, stem, handlebar). Availability of spare parts: 2 years.
 

Product benefits

Anatomic design Comfort for women: saddle, adjustable fork, raised position, closer brakes
Efficiency Ride efficiently thanks to 27.5" wheels, 18 speeds and light tyres.
Directional control hydraulic disc brakes, wide tyres and handlebar.
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.

FAQ

Q : How to assemble your bike?
Everything you need to know about making sure your bike is comfortable, secure and ready to ride.
Q : How do you adjust your brakes?
Having properly functioning brakes is vital when out on the road. Check out how to get them working to your liking.
Q : How to replace a brake lever on a bike?
Having properly functioning brakes is vital when out on the road. Here’s a video to show you how to make sure your new brake level is working nicely.
Q : How to replace a disc brake?
Having issues with your disc brake? Then this video is for you.
Q : How to adjust your bike handlebar?
A suitable handlebar height is essential to your cycling safety and comfort. Find out how to adjust it to your liking with our video.
Q : Do you offer a Cycle To Work scheme?
Find out everything you need to know about way of getting to work that’s good you and the environment.Check Here

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FAQ

Q : How to assemble your bike?
Everything you need to know about making sure your bike is comfortable, secure and ready to ride.
Q : How do you adjust your brakes?
Having properly functioning brakes is vital when out on the road. Check out how to get them working to your liking.
Q : How to replace a brake lever on a bike?
Having properly functioning brakes is vital when out on the road. Here’s a video to show you how to make sure your new brake level is working nicely.
Q : How to replace a disc brake?
Having issues with your disc brake? Then this video is for you.
Q : How to adjust your bike handlebar?
A suitable handlebar height is essential to your cycling safety and comfort. Find out how to adjust it to your liking with our video.
Q : Do you offer a Cycle To Work scheme?
Find out everything you need to know about way of getting to work that’s good you and the environment.Check Here