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Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
Men's Mountain Bike 27.5'' - ST 120 Grey/Orange

ROCKRIDER

8640691

Men's Mountain Bike 27.5'' - ST 120 Grey/Orange

$550.00
$500.00
-9%
14 reviews
13 of 14 people recommends this product
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
  • Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
Men's Mountain Bike 27.5'' - ST 120 Grey/Orange
Size :
Not available online

Store Availability

This aluminium bike has been designed and developed to best suit getting started with mountain bike touring in dry weather!

BENEFITS

Cycling comfort

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

Easy to use

Adjust your speed without thinking: 9-speed single-chainring drivetrain.

Directional control

Control your trajectory: cable disc brakes, tires with side knobs

Efficiency

Pedal efficiently: light aluminum frame, 9 speeds and fast tires.

Durability

An ultra-strong MTB: welded saddle, double-wall rims.

Lifetime warranty

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

Instructions


TECHNICAL INFORMATIONS

Which is the right 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
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 a heavily-sloped top tube and a wide range of sizes (from S: 1.50 m to XL: 2 m)

The ST 120 mountain bike frame is unisex.

The ST 120 mountain bike available with the same frame in a women's version: adapted seat, narrower handlebar, 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 the team

Designed at the Btwin Village in Lille, France.

Recreational mountain bikers told us they wanted comfort, effectiveness, and durability. Based on that, we designed and tested the ST 120 mountain bike with the help of riders at every stage.

A lightweight, comfortable, fun frame

Our designers created a frame that's easy to get onto.

The 100% aluminum CGF frame (Comfort Geometry Frame) is both comfortable and easy to handle. The slope angle keeps your back straight while the lower rear bases ensure the bike is very agile during turns.

Front suspension

The 80 mm front suspension helps overcome obstacles on slightly uneven trails easily.

Easily adjust the hardness using U-Fit technology (weight adjuster). Simply set the number to your weight (55 kg to 105 kg) using the dial on the fork.

Rear suspension: none

This mountain bike has no rear suspension.
It is a semi-stiff 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. You spend less energy on flat ground.

Derailleur and drivetrain: A single chainring like the pros!

The single chainring is easy and efficient to use:
1 chainring and 9 speeds.
Accelerate on the flats and easily tackle the climbs.
With a single lever on the handlebar, you can change gears while hardly thinking!

- Rockrider 100 FC ATB 32-tooth single chainring equipped with 2 chain guides (anti-derailment)
- Microshift RD-M46-L rear derailleur
- Microshift SL-759 right shifter
- Microshift H092 9-cog cassette (11-36 teeth)
- Wide, sturdy KMC Z9 chain

Handlebar, stem, grips

With a stem that tilts 10° upwards, the riding position of the ST 120 is raised, accessible, and comfortable. In detail:

- 90 mm aluminum stem with a 10° angle for maximum comfort
-620 mm-wide steel handlebar for stability and control
- ”Soft-touch" grips for a firm yet soft and pleasant grasp.

Saddle:

The saddle of the ST 120 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.

Mechanical disc brakes

The Tektro TKD 68 160 mm double disc brakes provide powerful, progressive braking at the front and rear. The aluminum Tektro brake levers are precise and easy to hold. The brakes can be applied using only two fingers.
3 or 4 series of 10 dry, intermittent stops are enough to break in your pads. Have your brakes checked at least once a year.

27.5" wheels and tires for dry terrain

The 27.5" wheels of the ST 120 are tolerant and sturdy, with 19 mm double-walled rims with 28 spokes.
Start overcoming obstacles like small rocks, cracks, holes, and bumps fearlessly!
Because your first rides will be on dry ground, the Dry 27.5 x 2.0 tires are most suitable. The central section has low rolling resistance (faster), while the side lugs provide good grip on turns.

Platform pedals:

The Rockrider ST 120 mountain bike comes with resin mountain bike platform pedals for lower weight and increased safety.
If your foot can slip off the pedal, you're less likely to injure yourself.

Transport and storage:

A quick-release system added for easily removing/reattaching the front wheel.
Our advice: a bike rack is an easy way to transport your mountain bike without getting your car dirty.

Accessories:

Your ST 120 mountain bike is fitted with a bell, lights, wheel reflectors, and pedals.

The frame is compatible with:
- 300 central stand (ref. 8172767) and 500 central stand (ref. 8172769)
- 100 bottle cage (ref. 8049106) and 500 bottle cage (ref. 8358133)
-Mountain bike mudguard set (ref. 8385291)
-100 saddle bag (ref. 8347394), and 500 saddle bag (ref. 8354448)
- 500 pannier rack (ref. 8364376)
- 100 frame child seat (ref. 8486913 and 8487125), from size M

Comfort and safety

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

Videos

Reviews

4.4/5 14 reviews
13 of 14 people recommends this product
Wife M. Bike
Francisco (Canada) Used for 2 week or less Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Overhaul is a ok bike for a beginner people helping are amazing allways ready to help.
Response of the brand

Hello 

 

Thank you for taking the time to write to us about your product experience. We truly appreciate your feedback. We will definitely pass on this feedback to our employees & we can't wait to welcome you to our store again.




Thanks & Regards,

Decathlon Brampton Team

Bike
Eliseo (Canada) Used for 2 week or less Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Its a good bike
Response of the brand

Hello Eliseo,

 

Thank you for taking the time to write to us about your product experience. We truly appreciate your feedback.

 

We would really appreciate it if you could also drop us a google review, it will help others find out about our store easily: https://g.page/r/CfN9rpYl0dwfEAg/review 

 

Wishing you a fantastic day :)




Thanks & Regards,

Decathlon Brampton Team

Great cheap starter bike
John (Canada) Used for 3 to 8 weeks Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Bought for my kids.
What to say…it’s a nice cheap bike for having fun with. Components seem good. Can’t beat the lifetime warranty and free 12 month service
Response of the brand

Hello John,


Thank you for taking the time to write to us about your in-store experience at Brampton Decathlon

We truly appreciate your feedback and hope you’re enjoying!


Wishing you a fantastic day :)




Thanks & Best Regards,

Decathlon Brampton Team

Bike
Glyn (United Kingdom) Used for 3 to 8 weeks Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Love it, its a great bike. Sturdy and easy to ride. Brilliant
Great Bike & Great Service
Jayne (United Kingdom) Used for 3 to 8 weeks Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Couldn't fault the product, comfy and perfect for what I need.
The service we received from Krasen at the Coventry store, answered all our questions, built the bike in store and carried out thorough checks to make sure we had the perfect size and great communication throughout the build and collection. Thank you!
Rockrider
Lee (United Kingdom) Used for 4 to 6 months Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Very good value for a low priced bike
Response of the brand

We are glad to hear you are happy with our ST120 bike.

Thank you for taking the time to leave your feedback.


Emily

Sports Advisor (Customer Service)

Decathlon Wednesbury


Decathlon UK Limited. Company number: 03140144. VAT number: GB679262296.

Registered office: 9 Maritime Street, London, SE16 7FU.

Poor product or human error
Matthew (United Kingdom) Used for 2 week or less Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
I purchased the bike on 22/01/22. On the second time using it which was a week later, I was lowering the gear when the derailleur completely snapped off. Uncertain as to whether this was a fault with the bike or if it was not properly/competently safety checked.
Rockrider
Matthew (United Kingdom) Used for 2 week or less Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Great bike lovely build worth the money
Smooth ride and easy gear change
Jacques (United Kingdom) Used for 2 week or less Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
on ride , xxl size and colour black / blue
Great bike
Samantha (United Kingdom) Used for 8 to 12 months Verified purchase What is a "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 a review is not marked as "Verified purchase," this does not mean that the author's review has no experience with the product. They may have given their review directly on the site without unique identification, or the product has been offered or paid by someone else.

The label "Verified purchase" let's help you judge the reliability of a review.
Purchased for my son. So far so good after 6 months of daily use.
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