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ROCKSHOX remote lockout hydraulic fork

  • 15 - Cycling - Men's 27.5
  • 15 - Cycling - Men's 27.5
  • 15 - Cycling - Men's 27.5
  • 15 - Cycling - Men's 27.5
  • 15 - Cycling - Men's 27.5
Reference : 8500763
15 - Cycling

ROCKRIDER Men's 27.5" Mountain Bike ST 900 - Grey/Orange

ROCKRIDER
Our team has developed this 27.5" mountain bike, with a ROCKSHOX hydraulic fork with remote lockout, for mountain bike rides of over 3 hours in any weather. Greater efficiency and more control: ROCKSHOX 120mm fork with remote lockout, single chainring, 27.5" lightened double-walled wheels, etc. Enjoy the lightweight ST 900 mountain bike!

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TECHNICAL INFORMATION

WHAT OUR TEAM HAS TO SAY

We created this ST 900 mountain bike at our B'Twin Village (Lille, France) especially for mountain biking enthusiasts. A comfortable, efficient mountain bike: 120 mm ROCKSHOX fork to easily overcome obstacles, fork with remote lockout, single chainring and 27.5" double-walled wheels that have been lightened for efficiency.
We've involved mountain bikers at every stage of the design process.
And we hope that the Rockrider ST 900 helps you make the most of your MTB tours.

A UNISEX MOUNTAIN BIKE

Men's or women's mountain bike?
This Rockrider ST 900 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 morphology is also available (specialised saddle, stem, fork and brake grips) to provide greater comfort.

HOW TO CHOOSE THE SIZE OF YOUR ST 900 MOUNTAIN BIKE

Several sizes available:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
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 LIGHT, COMFORTABLE, PLAYFUL FRAME

For less weight and more efficient pedalling, the Rockrider ST 900 frame has been designed with 6061 aluminium (only 1.6 kg in size M). It is 300g lighter than the ST 540 frame thanks to its double butted front triangle.
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.

ROCKSHOX FRONT SUSPENSION

The 120 mm Rockshox 30 Silver Air hydraulic fork is 400g lighter than that of the ST 540 bike. It is conical and offers even more stiffness and precision when steering.
Easily adjust the bounce and stiffness of the fork. Its quick COMBO LOCK lockout system, which you control from the handlebar, helps to prevent bobbing and loss of speed on smooth sections.

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. If however you're looking for comfort and manoeuvrability, the ST 900 is available in a full suspension version with suspension at the rear.

DERAILLEUR & DRIVETRAIN: A SINGLE CHAINRING LIKE THE PROS!

The single chainring is easy and efficient to use.
1 chainring and 11 speeds: accelerate on the flat and take on climbs with no compromise.
1 single shifter on the handlebar: adapt your speed instantly like the pros as the terrain changes!
In detail:
-SRAM X1 32-tooth single chainring
-MICROSHIFT M665 11-speed rear derailleur
-MICROSHIFT M8515 right shifter
-MICROSHIFT H113 11-cog 11 to 46 teeth cassette
-KMC X11 chain

HANDLEBARS, STEM, GRIPS

The adjustable stem brings the controls for the ST 900 easily under your hands. The all-aluminium ROCKRIDER stem is 70 mm (size S), 80 mm (size M/L), or 90 mm (size XL) and can be raised using 5 adjustment intervals: + 0mm, + 7.5mm, + 15mm, + 22.5mm, + 30mm.
In detail:
- 720mm oversized ROCKRIDER SPORT aluminium handlebars
- ROCKRIDER ergonomic grips for good grip and a comfortable feel.

COMFORTABLE, SPORT SEAT POST AND SADDLE

Our teams have conceived and designed an exclusive ROCKRIDER ERGOFIT Pro saddle. Designed for all hip widths, its hammock shape is very comfortable for long sports rides. The Flex 27.2mm diameter aluminium 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.

HYDRAULIC DISC BRAKES

No matter what conditions you ride in (dry/wet), the Rockrider by Tektro 180 mm (front) and 160 mm (back) double hydraulic disc brakes will come through for you, even in the mud.
Hydraulic braking adds more power and progressive braking and requires less powerful use of the brake levers.
The aluminium brake levers are easy to grip, lightweight, and precise.

WIDE, LIGHT 27.5" WHEELS

The 27.5" wheels are lightened with double walls. Their sleeved rims, combined with the lightened tyres, are 230g lighter than on the ST 540.
With their 28 spokes, they are lightweight, stiff, and durable.
The exclusive ROCKRIDER ALL CONDITIONS LIGHT 27.5"x2.2 tyres have side knobs for all terrains. A width of 2.2 means more grip on technical sections.
Tubeless Ready rims: you will need rim tape, specific valves and sealant.

FLAT PEDALS

The ST 900 is supplied with Rockrider Flat platform pedals with a wider pedalling surface and more pronounced dots for better grip on the pedal.

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 900 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,
- cyclometer/GPS
etc.

COMFORT & SAFETY

On your first few rides, the equipment on your bike may shift a little (chain, derailleur, brakes, etc.). We offer a free inspection in the 6 months following purchase. Our technicians will carry out a 13-point check of your bike. Visit your nearest Decathlon workshop and our after-sales website:
https://support.decathlon.fr/

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COMPOSITION / ADVICE

Composition
Frame (for bike)
100.00% Aluminium 6061
Stock advice After washing, rub with a dry cloth to remove all traces of moisture. Store your mountain bike in a cool, dry place, away from corrosive products and salty air.
Restricted use : Not suitable for XC, All Mountain, Enduro and BMX.
Legal notice Your bike's weight may vary due to tolerances in the components. To make your wheels last longer, we recommend not exceeding the maximum weight of 120kg (rider with mountain bike).

OUR COMMITMENTS

Test Product Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.
Guarantee : Lifetime (frame, stem, handlebars). Availability of spare parts: 2 years.
 

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