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ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
ST 520 S Mountain Bike 27.5" - Grey

ROCKRIDER

8378294

ST 520 S Mountain Bike 27.5" - Grey

$520.00
22 reviews
18 of 22 people recommends this product
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
  • ST 520 S Mountain Bike 27.5" - Grey
ST 520 S Mountain Bike 27.5" - Grey
Size :

Store Availability

Our team has developed this 27.5" full suspension mountain bike with disc brakes for your mountain bike touring in dry weather, for rides of 2-3 hours.

BENEFITS

Cycling comfort

You'll love the double 120 mm suspension, adjustable stem, & hammock saddle!

Efficiency

Efficient cycling thanks to the 27.5" wheels, 24 speeds and aluminum frame.

Precision

Control your path with the double disc brakes and wider tires.

Easy to use

Use the wheel to adjust the fork to your weight. Easily adjust the saddle.

Lifetime warranty

ROCKRIDER offers a lifetime warranty on the frame, handlebars and stem.

TECHNICAL INFORMATIONS

WHAT OUR TEAM HAS TO SAY

Our passionate MTB team has fully designed and developed the ST 520 S mountain bike at the B'Twin Village in France (Lille). We've designed, developed, and tested the ST 520 S for comfort and efficiency. 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 520 S is everything you could hope for to give you excellent MTB rides.

A UNISEX MOUNTAIN BIKE

Men's or women's mountain bike?
This Rockrider ST 520 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 body shapes is also available (specialized saddle, stem, fork, and brake grips).

HOW DO I CHOOSE MY MTB SIZE?

Several sizes available: S: between 1.50 m and 1.64 m (4'9"-5'3")
M: between 1.65 m and 1.74 m (5'3"-5'7")
L: between 1.74 m and 1.84 m (5'7"-6')
XL: between 1.85 m and 2.00 m (6'-6'5")

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 LIGHT, COMFORTABLE FRAME

We've used 6061 aluminum for this Rockrider Sport frame for greater lightness. The result: only 2.9 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.

THE FRONT 120 MM SUSPENSION

The hydraulic 120 mm fork means you can easily ride over any obstacles (roots, rocks, stones, mud).

Directly adjust the stiffness of the suspension to your weight, from 55 kg to 105 kg, to more easily travel over roots and stones. This is all thanks to the UFIT concept (exclusive to Decathlon). Easy: simply turn the adjustment wheel!
Built into the right damper, its quick-release system helps prevent bobbing on smooth sections.

THE REAR SUSPENSION: GREATER COMFORT

That is why our designers fitted the ST 520 S with a U-FIT hydraulic spring shock that is lightweight and specifically designed for 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.

TRIPLE CHAINWHEEL DRIVETRAIN AND DERAILLEUR

3 8-speed chainwheels, or a wide range of 24 speeds!
2 quick shifters on the handlebars.
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
- SRAM X3 rear derailleur
- SRAM X4 shifters, with speed indicators
- SRAM PG820 8 cog cassette, 11 to 32 teeth

HANDLEBARS, STEM, GRIPS

The controls of the ST 520 S fall straight under your hands thanks to the adjustable stem. The all-aluminum B'Twin stem is 70 mm (size S), 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:
- Aluminum 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

COMFORTABLE, SPORTY SADDLE/SEAT POST

Our teams conceived and designed an exclusive saddle for this bike. Suitable for all hip sizes, its "hammock" shape is particularly good for sport touring.
With a 29.8 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.

MECHANICAL DISC BRAKES: GET A GRIP ON YOUR BRAKING

The Hayes M-X5 160 mm mechanical double disc brakes provide powerful, progressive braking to the front and rear. While the aluminum Tektro brake levers are light, precise, and easy to hold. Just two fingers are all you need to brake.
Try to get your brakes adjusted at least once a year.

27.5" DOUBLE-WALLED RIMS & ALL TERRAIN TIRES

Take on obstacles! The aluminum 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 B'Twin All Terrain Light 27.5" x 2.0 (rear) and 27.5" x 2.1 (front) tires have a system of lugs specially designed for all terrain use, to travel with you on any type of surface during your mountain bike touring.

PLATFORM PEDALS

The ST 520 is supplied with platform MTB pedals mounted on bearings, made from resin for light weight and safety. If your foot slides on the pedal, there's less risk of injury.

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 wrench is needed to remove the rear wheel.
A bike carrier will make your life easier if you want to avoid dirtying your car.

ACCESSORIES

Your ST 520 mountain bike is supplied with a bell, lights, wheel reflectors, and pedals.

The frame is compatible with:
- front and rear fenders,
- stand,
- bottle cage (500 ml bottle),
- saddle bag,
...

OUR ADVICE FOR YOUR FIRST FEW RIDES

Tip No.1
When mountain biking, there is always the risk of a fall: don't forget to wear a helmet.

Tip No.2
Even if the saddle is comfortable, cycling shorts with a pad (saddle-shaped foam) are a real plus for preventing glute pain.

Tip no.3
If you don't want to stop to drink, bring water in a bottle or water bladder to access it while riding.

Tip No.4
Punctures are always possible, remember to bring a repair kit.

Reviews

4.3/5 22 reviews
18 of 22 people recommends this product
It Does Everything I Need and Want
Mike (Canada) Used for
I love this bike. I ride with a couple of guys on their $5000 bikes, and I honestly can't see how my experience is any different than theirs... at 1/10th the price!
the best full suspension MTB cycle at this price!!
Rishav (India) Used for
This bike is quite unique compared to others let it be coming to breaks or the suspension and gears! Perfect balance for all trail.
PS - make sure you get the fitting done by an expertise ONLY!
ST 520 S
Vijayakumar (India) Used for Verified purchase What is a review "Verified purchase" ?

Where review is marked as "Verified purchase" confirmed by Decathlon, this means that we could verify that the client who filed this opinion has purchased the product from us.

We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

If review is not marked as "Verified purchase", this does not mean that the author's review has no experience with the product may have given his review directly on the site without unique identification, or the product has been offered or paid.

The label "Verified purchase" lets help you judge the reliability of a review.
I think the front and rear brake handles are fitted on the wrong side . The front brake is in the left and the rear is on the right
Not worth 100 let alone 389
ALEXANDER E (United Kingdom) Used for Verified purchase What is a review "Verified purchase" ?

Where review is marked as "Verified purchase" confirmed by Decathlon, this means that we could verify that the client who filed this opinion has purchased the product from us.

We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

If review is not marked as "Verified purchase", this does not mean that the author's review has no experience with the product may have given his review directly on the site without unique identification, or the product has been offered or paid.

The label "Verified purchase" lets help you judge the reliability of a review.
Bike falls to bits even on the most basic of trails.im talking going down a bumpy road something a mountain bike should easily be able to handle. Makes horrible squeaking noises! Might as well buy a cheaper model and I would recommend buying it from another shop as decathlon wont get back to you if you do have any issues. Super frustrating and very dissapointed.
Surprisingly good
luke (United Kingdom) Used for
I keep looking and looking and eventually decided to take the leap and buy, and online.
I am 6ft 3, and 18.5 stone and as a kid growing up loved riding, and i needed something that would be strong and good enough to cope with off road and hard riding.im really pleased with this bike, and would recommend. The only defect is the suspension lock off is plastic and came off immediately
Awesome Value for Money
Simon (United Kingdom) Used for
cannot fault this bike! It does what I need it to do both on and off road. Had to change the seat as the other one was hurting quite a bit, but I'm a big guy so maybe good for someone lighter. My friends have bikes that cost ££££'s and even they are impressed with this bike. Can't really think of anything I would change to be honest.

If you use an underseal saddle bag, and have a seat post light and mudguard at the rear, you can't fit the bag on I've found.

Mounting for a phone or GPS tracker is good. Either handlebars or cross bar is fine!

I think its a lovely look bike aswell.
Amazing bike
Alessandro (United Kingdom) Used for Verified purchase What is a review "Verified purchase" ?

Where review is marked as "Verified purchase" confirmed by Decathlon, this means that we could verify that the client who filed this opinion has purchased the product from us.

We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

If review is not marked as "Verified purchase", this does not mean that the author's review has no experience with the product may have given his review directly on the site without unique identification, or the product has been offered or paid.

The label "Verified purchase" lets help you judge the reliability of a review.
Amazing MTB I'm having lots of fun with it. If I had to find a fault I'd say I'd go for a SHIMANO next time because changing gears is not amazingly smooth but overall great bike for the price
Ive had this bike for a few months not happy
Angelina (United Kingdom) Used for
Ive had this bike for a couple of months and the derailleur keeps snapping of, the other day I went up a curb on my bike and the derailleur snapped of causing my brake wire to snap so when I tried to stop only my front wheel stopped and that caused me to get thrown over my handlebars of my bike. Also with all of this chaos due to the corona virus it will take a few months for my bike to be able to be fixed. This is unbelievable, the bikes suspension is rubbish it might as well be a hardtail and the price I paid for this bike for it to just snap is just unacceptable. So I am going to get a new bike that is a suitable moutain bike that can ride the trails unlike the Bt-win Rockrider 520 s
Response of the brand
We are sorry to read that you have been experiencing some mechanical issues with your bike. We would very much like to take a look at the bike and provide a solution to the problem you are encountering. As you rightly point out, this is somewhat complicated at the moment. There may be a fault or a simple adjustment could resolve the problem but without more details and clarity it is hard to say. If you would like to receive a call or technical support regarding your bike, please fill in the contact form with precise details of the fault, any photos you may have and the support you require: https://www.decathlon.co.uk/en/contactUsWithoutAccount
DECATHLON
Very good
Ayre (United Kingdom) Used for Verified purchase What is a review "Verified purchase" ?

Where review is marked as "Verified purchase" confirmed by Decathlon, this means that we could verify that the client who filed this opinion has purchased the product from us.

We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

If review is not marked as "Verified purchase", this does not mean that the author's review has no experience with the product may have given his review directly on the site without unique identification, or the product has been offered or paid.

The label "Verified purchase" lets help you judge the reliability of a review.
I will all ways go there for my stuff
Väldigt bra cyckel
David (Malta) Used for
väldigt bra cycskel som håller pris värdet med fin back fjädring men skulle föredra hydraliska hadbromsar istälet för mekaniska det skulle förbättra cyckeln mycket.