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ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
ST 520 27.5" Mountain Bike - Black/Blue

ROCKRIDER

8350582

ST 520 27.5" Mountain Bike - Black/Blue

$450.00
1430 reviews
1281 of 1430 people recommends this product
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
  • ST 520 27.5" Mountain Bike - Black/Blue
ST 520 27.5" Mountain Bike - Black/Blue
Size :

Store Availability

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

BENEFITS

Cycling comfort

Enjoy the raised position, adjustable stem, 80 mm suspension and hollow saddle

Directional control

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

Efficiency

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

Easy to use

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

Lifetime warranty

Rockrider provides a lifetime guarantee for the frame, stem, and handlebars.

TECHNICAL INFORMATIONS

WHAT OUR TEAM HAS TO SAY

This ST 520 mountain bike has been entirely designed and developed at the B'Twin Village in France (Lille). We've designed, developed, and tested the ST 520 MTB 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 that the Rockrider ST 520 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 mountain bike 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 TO CHOOSE YOUR ST 520 MOUNTAIN BIKE SIZE

Several sizes available:
S: between 1.50 m and 1.64 m
M: between 1.65 m and 1.74 m
L: between 1.75 m and 1.84 m
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 a lighter weight and more efficient pedalling, the Rockrider ST 520 frame has been designed with 6061 aluminum (only 1.9 kg in size M). Our designers have designed and developed it so it is 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.

FRONT SUSPENSION TO CUSHION UNPREDICTABLE TERRAIN

Directly adjust the stiffness of the suspension to your weight to more easily travel over roots and stones.

The 80 mm front suspension is designed for slightly uneven trails and helps you overcome your obstacles with no worries. It is based on a mechanical spring and is reliable. And it's easy to look after.

REAR SUSPENSION: NONE

This mountain bike has no rear suspension. This is a "semi-rigid" mountain bike.
Compared to a full suspension mountain bike (with rear suspension), the advantages are clear: lighter weight, you will spend less energy on flat ground. However, if you want more comfort, the ST 520 MTB also exists in a "full suspension" version with a rear shock absorber.

DERAILLEUR & DRIVE TRAIN: HOW TO CHANGE SPEEDS

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 or Microshift FD-M22 front derailleur
- SRAM X3 rear derailleur
- SRAM X4 shifters, with speed indicators
- SRAM PG820 8-cog cassette, 11 to 32 teeth

HANDLEBARS, STEM, GRIPS: TAKE CONTROL OF THE HANDLEBARS

With its adjustable stem, the ST 520 controls are close at hand. 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:

- 680 mm oversized aluminum handlebars
- Soft touch B'Twin sport grips for good grip and a comfortable feel.

SEAT / SEAT POST: Comfortable and sporty seat

Our teams conceived and designed an exclusive saddle for this bike. Suitable for different hip sizes, its "hammock" shape is particularly good for sport touring. The Flex 27.2 mm diameter aluminum 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.

MECHANICAL DISC BRAKES: GET A GRIP ON YOUR BRAKING


The HAYES M-X5 mechanical double disc brakes give you gradual, powerful braking at the front and back. 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 WHEELS & TIRES FOR DRY GROUND

Take on obstacles! The aluminum wheels are effective and sturdy: 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 2.0 B'TWIN ALL TERRAIN DRY tires are designed for dry terrain. Their side lugs provide good traction during turns. Recommendations for pressure based on the cyclist's weight are marked on the sidewalls.

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. 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 520 mountain bike is supplied 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 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 along in a bottle or water bladder you can access while riding.

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

Reviews

4.3/5 1430 reviews
1281 of 1430 people recommends this product
Bon rapport qualité prix
Jonathan (Canada) Used for 2 à 8 semaines
Vraiment un super vélo : changer les vitesses est super agréable, les poignées très confortable. Je conseille d'utiliser un cuissard car on peut vite avoir mal aux fesses.
Aussi, le cadre est magnifique car finition brossé mat, cependant il prend vite les rayures donc à faire attention. J'ai pu y fixer sans trouble un siège bébé Canadian Tire.
Vélo livré avec le dérailleur arrière déréglé
Othmane (Canada) Used for 1 semaine ou moins
Je viens de recevoir le vélo par livraison. Rien à signaler à par le fait que je n'arrive pas à passer ni l'avant-dernière ni la dernière vitesse (quand je le fais, le petit pignon du dérailleur touche la roue arrière) ...
Je ne pense pas pouvoir aller au SAV pendant le confinement, mais j'aimerai bien savoir comme régler ce problème moi-même entre-temps.
Si le problème est réglé, je pense que le vélo est bon pour son prix (un peu lourd mais robuste). Mais tant qu'il n'est pas réglé, j'arrive pas à monter les pentes :(
stephane.tremblay8 (Canada) Verified purchase What is a review "Verified purchase" ?

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Bon rapport qualité prix
Vélo de qualité…
Mike (France) Used for 3 à 6 mois Verified purchase What is a review "Verified purchase" ?

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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.

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Vélo de qualité
Bien, par contre l'achat…
Rémie (France) Used for 3 à 6 mois 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.
Bien, par contre l'achat des accessoires pour avoir un vélo 'équipé double le prix d'achat du vélo :(
Bon achat et agréable…
Michaël (France) Used for 2 à 8 semaines 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.
Bon achat et agréable
Vtt de qualité et…
ANGELIQUE (France) Used for 2 à 8 semaines 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.
Vtt de qualité et très esthétique. Je suis fan du rockrider.
Vélo testé depuis des…
Eric (France) Used for 7 à 12 mois 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.

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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.

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Vélo testé depuis des mois sur sentiers de forêt et campagne.
Il est fonctionnel.
Très bon rapport qualité…
Valerie (France) Used for 2 à 8 semaines 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.
Très bon rapport qualité prix
bonne sensation avec ce…
alexandre (France) Used for 2 à 8 semaines 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.
bonne sensation avec ce vélo et agréable car moins de vibrations avec les suspensions à l'avant