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ROCKRIDER AM 100 S Full Suspension Mountain Bike - 29"

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was £1,399.99 -%


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£1,399.99 -%
This price includes a recycling fee for electrical equipment and batteries DecathlonDeeeTaxMentionAfterPrice / Since

* From To

* Sales from to Until end of stock
* From and limited stock
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This all-mountain bike has been designed for climbing peaks and enjoying downhill thrills. New version of our AM 100 S full suspension all-mountain bike: geometry designed for steering, with 29" wheels for better speed and stability.
Not Available Now

Due to high demand, we are currently suspending online delivery for bikes. We are now increasing the availability of our bikes in our store showrooms while continuing with our Click and Collect service.
Our Click and Collect service has hit it’s threshold limit for the day (count resets at 11pm daily). This is a temporary measure and we thank you for your patience and understanding.

Product benefits

Directional control Steering control: 66° head angle, short stem, low chainset, dropper seat post
Grip New Rockshox 35 fork, Tubeless Ready tyres.
Braking power SRAM LEVEL T 180mm/160mm hydraulic disc brakes

Technical Information

Choosing your mountain bike size

Several sizes available:
S: 1.55 m to 1.64 m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85 m and 1.95 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 higher performance).

The story of the 100S all-mountain bike...

This mountain bike was fully designed and developed at the B'Twin Village (Lille, France) and is the brainchild of an expert team of all-mountain bike enthusiasts.
The Rockrider team designed and tested this Rockrider 100 S All-Mountain bike together with their MTB testers.
The AM 100 S is assembled at our own factory in Lille, just steps away from the bike design team.


The ROCKRIDER ALL MOUNTAIN frame offers 140 mm of travel on the rear wheel.
Its geometry has been optimised for steering: 66° steering angle, 15 mm bottom bracket under the wheel axle.
Made of 6061 and 6013 aluminium.
Lifetime warranty on the Switch & Ride frame: compatible with 27.5" and 29" wheels.
148 mm x 12 mm BOOST rear axle.
Press Fit 92 bottom bracket.
31.6 mm diameter seat post.
Compatible with a bottle cage.
Weight in size S: 2.7 kg.

Front suspension

ROCKSHOX 35 fork with 150mm travel.
With new Burly 35mm damping rods for more stiffness and control, and a DebonAir™ pneumatic spring (which reduces rubbing), the shock absorption and response to loading are increased. compatible with 27.5" and 29" wheels.

Rear suspension

Manitou McLeod Air 190X51 rear shock designed specifically for the Rockrider AM 100 S mountain bike.
Adjustable to reduce bobbing during long climbs on faster terrain.


SRAM NX drive train, 1x12 single chainwheel, for lighter weight, more precision, faster gear changing, and greater durability.
Rack: 34 teeth, easily replaceable (smallest chainwheel has 28 teeth, largest has 34 teeth) without changing the chain.
Cassette: SRAM EAGLE in 11/50 (11-13-15-17-19-22-25-28-32-36-42-50). The 50-tooth sprocket guarantees good gear reduction to help you climb the steepest slopes.

Riding position

Control your steering & stay precise.
Rockrider Comp Flat handlebars, 760mm wide for greater stability.
35 mm stem.
Semi-integrated headset with sealed bearings.
Lightweight Rockrider 900 "lock on" grips (attached to the handlebar with a screw-on system).


SRAM LEVEL T brakes: 4 front and two rear pistons.
180 mm front disc, 160 mm rear disc.

Saddle and seat post

The Rockrider XC/AM saddle has an Ergofit system for greater comfort while pedalling.
The height of the dropper seat post can be adjusted using the control on the bike's handlebar: 120mm of travel in size S/M and 150mm in L/XL. The ability to lower the saddle in a second with a single press of the thumb is a real advantage for all-mountain biking.
Feel at ease (and relaxed!) in your seating position on the bike during technical descents.


Sun Ringle Duroc 30 wheels, with Boost axles, 15 mm at the front and 12 mm at the back.
Outer rim width: 30 mm.
Watertight bearings.
Equipped with a watertight rim strip that is Tubeless Ready compatible.
To switch to Tubeless Ready: simply add a Tubeless valve and tyre sealant. The original tyres are already Tubeless Ready.


Hutchinson Taipan 29X2.25 and Toro 29x 2.35 tyres. Tubeless Ready.
A versatile tyre designed for riding on any type of terrain.
High side knobs for good grip in the turns.


The bike comes with B'Twin Flat Evo platform pedals. However, for improved performance when pedalling and for better control of the bike when cycling, we recommend replacing them with clipless pedals with platforms or wide aluminium platform pedals.

A unisex mountain bike

Men's or women's mountain bike? This Rockrider AM 100 S mountain bike is unisex.
For added comfort, the women on our mountain bike team recommend the Women's 500 Sport saddle, which is adapted to women's builds.

Transporting your bike

The front and rear wheels attach and remove in 1 motion: you just need a hex key (size 6).
The rear derailleur has a screed that locks and unlocks easily to easily attach or remove the rear wheel.

Free service and after-sales website

During your first few rides, your bike's equipment will stretch and move (chain, derailleur, brakes, etc.)
We offer a free service within 6 months of your purchase. Our technicians will carry out a 13-point safety check of your bike. If you need help, please visit our Decathlon after-sales website.


S - 155-164cm: 14.3 kg
M - 165-174cm: 14.4 kg
L - 175-184cm: 14.6 kg
bike without pedals

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Composition / advice

100.00% Aluminium
Stock advice We recommend storing your mountain bike in a cool, dry place, away from corrosive products and salty air.

Our commitments

Test Product Ask your local Decathlon store about testing before purchase.
Guarantee : Lifetime (frame, stem, handlebar). Details on our website. Availability of spare parts: 2 years.


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

Your reviews

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Our services

AM 100 S Full Suspension Mountain Bike - 29
Maintenance and repair
Maintenance and repair
Spare parts