Hide Filters
Filters 0
Sort by :
Filters 0
ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
ST 100 27.5" Mountain Bike

ROCKRIDER

8400335

ST 100 27.5" Mountain Bike

$300.00
1179 reviews
1062 of 1179 people recommends this product
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
  • ST 100 27.5" Mountain Bike - Women
ST 100 27.5" Mountain Bike
Colour :
Size :

Store Availability

This 27.5" mountain bike is designed for MTB touring beginners, for rides of up to 1½ hours in dry weather.

BENEFITS

Cycling comfort

Enjoy: raised position, 80 mm suspension, hammock saddle, and Flex seat post

Durability

An ultra-strong MTB: double-walled rims, welded saddle, and derailleur guard.

Efficiency

Light frame, 21 speeds, 27.5" wheels (XS 26”), and low-rolling resistance tires

Directional control

Control your trajectory: V-brake pads and tires with side knobs

Lifetime warranty

Rockrider offers a lifetime warranty on the frame, handlebars, and stem

TECHNICAL INFORMATIONS

What size mountain bike should I choose?

Several sizes available:

XS: between 1.40 m and 1.54 m
S: between 1.55 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
To adapt the bike to your height and size, try these tips:
1. You should be able to touch the ground with the tips of your toes when sitting on the saddle.
2. When your foot is on the pedal in the lowest position, your knee should be slightly flexed.
3. If you're between two sizes, choose the larger size.

Unisex frame

With the very pronounced slope of the top tube and a wide range of sizes (from XS: 1.45 m to XL: 2.00 m),

the ST 100 mountain bike frame is unisex.

The ST 100 mountain bike exists with the same frame in a women’s version: adapted seat, narrower handlebars, shorter stem, fork with a more flexible spring, and brake levers that are closer together.

If you’re a woman choosing the men’s model, we recommend purchasing the women’s Sport 500 saddle, which is adapted to women's bodies.

A word from our team

We created this ST 100 mountain bike at our B'Twin Village (Lille, France) especially for mountain biking enthusiasts.

Recreational mountain bikers told us they wanted comfort, effectiveness, and durability. Those features were our starting point as we designed, developed, and tested the ST 100 mountain bike, with real riders involved throughout the project.

A lightweight, comfortable, fun frame

It isn't always easy to get the right position on a mountain bike. Our designers have created an entirely new frame that’s easy to step over.

The 100% aluminum CGF frame (Comfort Geometry Frame) is both comfortable and easy to handle. The steep top tube angle keeps your back straight while the rear tube has been shortened to make the bike very agile when turning.

Front suspension

The 80 mm front suspension helps you overcome your first obstacles on slightly uneven trails with no worries.

Its mechanical spring is a stamp of reliability. And the fork is particularly easy to maintain.
Can its stiffness be adjusted? It's very easy to adjust using a single dial.

Rear suspension: none

This mountain bike has no rear suspension. This is a "semi-rigid" mountain bike: perfect for beginners launching themselves into their first mountain bike touring rides. Compared to a full suspension mountain bike (with rear suspension), the advantages are clear: this mountain bike is lighter and less energy is lost on level ground.

Derailleur and drivetrain:

3 x 7-speed chainrings for 21 speeds!
Two easy-to-use grip shifters on the handlebars.
Left (chainrings): control ascents/descents.
Right (speeds): more precise control of your pedalling.

In detail:
-Triple-chainring chainset (22/32/42 teeth) + anti-grease protection.
-Microshift FD-M20 front derailleur
-Microshift RD-M25 rear derailleur
-Microshift MS25 grip shifters with speed indicators
-Shimano TZ500 7-cog cassette, 14 to 28 teeth
-Large, solid KMC Z51 chain

Handlebar, stem, and grips:

With a stem that tilts 10° upwards, the riding position of the ST 100 is raised, accessible, and comfortable.

In detail:
-90mm (in sizes XS and S) or 110mm (in sizes M, L, and XL) aluminum stem with a 10° angle for maximum comfort
-620mm-wide steel handlebar for stability and control
-”Soft-touch" grips for a firm yet soft and pleasant grasp.

Saddle:

The saddle of the ST 100 is welded to prevent movement.

And because your comfort is our priority after your safety, we've added an exclusive wider Ergofit saddle with a hammock shape.

Easily adjust the height of your saddle with the Flex steel seat post (350 mm or 400 mm depending on the bike size). Its smaller 27.2 mm diameter provides your seat with natural flexibility—30% more than a stand saddle.

V-brakes with pads:

Two V-brake pads for effective braking.
These brakes are composed of callipers that exert more or less pressure on the rim to slow down or stop the rotation of the wheels.

You only need two fingers to brake thanks to the special design of the ST 100's aluminum brake levers.

27.5" wheels and tires for dry terrain

The wheels of the ST 100 are durable and robust with 27.5" double-walled 28-spoke rims (26" for the XS size). Start overcoming obstacles like small rocks, cracks, holes, and bumps fearlessly!
Because you're getting started with MTB touring on dry ground, this mountain bike is equipped with Dry 27.5 x 2.0 tires. Great performance thanks to a central section with low rolling resistance and side knobs that provide good grip on turns.

Platform pedals:

The ST 100 Rockrider mountain bike comes with hard resin platform mountain bike pedals for added lightness and safety.
If your foot slides on the pedal, there's less risk of injury.

Transport and storage:

We added a quick-release system for easily attaching/removing the front wheel.
There’s a nut at the back to secure the bike and limit the risk of theft. You will need a spanner to remove the rear wheel.
Our advice: a bike rack is an easy way to transport your mountain bike without getting your car dirty.

Accessories:

Your ST 100 mountain bike comes with a derailleur guard, a chainring guard (to keep your clothes from getting dirty), a bell, lights, wheel reflectors, and pedals.

The frame is compatible with:
-Front and rear mudguards (Flash MTB or MTB 700)
-Stand (500 Adult Base)
-Bottle cage
-Saddle bag
-Rear pannier rack
-Child seat (depending on the model)
-and much more

Comfort and safety

Your bike's components (chain, derailleur, brakes, etc.) will adjust over time. Take advantage of a free servicing within 6 months after purchase. Our technicians will carry out a 13-point check of your bike. Just come to your nearest Decathlon workshop with your Decathlon card and/or receipt.

Legal disclaimer

To make components last longer, we recommend a maximum load of 120 kg (rider and MTB included).
For more information on how to use and care for your Suntour fork, please visit the Suntour website.
You can download the user manual for your fork at:
https://www.srsuntour.com/generalforkmanual/

Reviews

4.3/5 1179 reviews
1062 of 1179 people recommends this product
Excellent!
Patrice (Canada) 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 satisfait!
Felix
felix.montreuil (Canada)
Excellent qualité, bien construit et durable
très bon produit
pompier531 (Canada) Used for 1 semaine ou moins
aucun problème pour le moment
Mon fils en est…
ADELINE (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.
Mon fils en est vraiment ravi !
Vélo qui convient et…
Pierre-Yves (France) Used for 1 semaine ou moins 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.
Vélo qui convient et plait à un adolescent.
Conforme à mes attentes…
Natacha (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.
Conforme à mes attentes
Mauvaise qualité des matériaux utilisés
Claire (France) Used for 2 à 8 semaines
A peine 200 kms avec le vélo à cause de confinement chaîne cassée, plateaux en triste états, je dois l’emmener en réparation, je pense demander une reprise au prix d'achat, et l'assurance à 1€ ne fonctionne qu'en cas d'accident mais en aucun cas sert de garantie !!!!!
Response of the brand

Bonjour Madame,


Je vous remercie pour votre avis concernant notre VTT ST 100.

Je suis désolé de la contrariété occasionnée par l'entretien nécessaire de la transmission de votre vélo.

Sur l'état des plateaux, je ne peux pas me prononcer. Il faut tout de même savoir que les éléments de transmission sont des composants dits d'usure, qui travaillent en contact et frottement métal/métal, et qu'il est normal de voir le revêtement noir des dents disparaitre à l'usage.

Concernant la casse de la chaine, afin de l'éviter, il est recommandé:

-d'éviter de croiser la chaine (ex: utiliser le grand plateau avec le grand pignon OU utiliser le petit plateau avec le petit pignon)

-d'éviter les passages de vitesse tardif (sous charge) en montée

Ce sont souvent ces deux situations d'usage qui provoque l'incident.


Bien entendu vous pouvez ramener votre vélo en magasin.

La valeur de reprise d'un vélo est établie à la discrétion du vendeur, en fonction de l'état du vélo.


Sportivement.



Sylvain _ Chef de Produit

premières utilisations satisfaisantes, à…
Anne-Raphaele (France) Used for 1 semaine ou moins 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.
premières utilisations satisfaisantes, à voir sur la durée
Pb de Chaine qq…
JEAN MARC (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.
Pb de Chaine qq jours 1pres l'achat
Après un mois d'utilisation,…
Janette (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.
Après un mois d'utilisation, la selle ne tient pas en place, les freins et le vélo grince. La lampe frontale n'a jamais fonctionné
Response of the brand

Bonjour Madame,


Je vous remercie pour votre avis concernant notre VTT ST 100.

Concernant le serrage de la selle, il doit être effectué avec un couple minimum de serrage de 22Nm pour garantir une immobilisation durable.

Vous pouvez faire appel à notre atelier SAV pour ce serrage si nécessaire.

Pour diminuer le bruit des patins de freins, vous pouvez les incliner en "V" comme un chasse neige pour obtenir un contact entre les patins et la jante plus progressif.

Lorsque les patins seront rodés (lorsque la jante sera recouverte de gomme), le bruit disparaitra.

Lors de votre visite à l'atelier, vous pourrez également demander un nouvel éclairage.


Désolé pour la gène occasionnée.

Sportivement.



Sylvain _ Chef de Produit

JANETTE not found this answer helpful