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Rockrider XC 500 Mountain Bike 29''

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Model: 8551327

Product Features

A photo of the Rockrider XC 500 Mountain Bike 29'' in use

Rockrider XC 500 Mountain Bike 29'' is designed for

Choose our high-performance aluminum XC MTB with GX drive train, REBA fork, and 27.5" wheels. This "SWITCH and RIDE" mountain bike is compatible with 3 wheel sizes (27.5", 29" and 27.5" PLUS).


Performance: semi-rigid XC geometry, SRAM GX EAGLE 1x12 and SunRingle Duroc 30 w


Go faster with its semi-rigid 6013 aluminum frame (3.5 lbs in size S).

Shock absorption

Overcome obstacles: ROCKSHOX REBA RL 4" remote lockout fork.

Braking power

Enjoy the powerful SRAM LEVEL T double piston brakes, with 7.1"/6.3" discs

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Size Guide

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Additional Product Information


Bike frame

  • 100% Aluminum

The story of the rockrider 500 cross-country mountain bike...

Entirely designed and developed in France at the B'Twin Village (Lille), this mountain bike is the fruit of the work of an expert team of passionate cross-country mountain bikers. The Rockrider team designed and tested the Rockrider 500 XC mountain bike with their mountain bike testers. For your satisfaction, the Rockrider XC 500 is assembled in our own factory in Lille, France, just a stone's throw away from our design team. For more information:

Switch and ride: 1 bike, many rides

The SWITCH and RIDE system is easy: a mountain bike frame compatible with 3 wheel sizes. 1/ You choose your SWITCH AND RIDE compatible mountain bike in 27.5", 27.5"+, or 29". 2/ You add a 2nd or 3rd pair of wheels. 3/ Enjoy all terrains!

A unisex mountain bike

Men's or women's mountain bike? The Rockrider 500 XC 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.

Choosing your mountain bike size

Several sizes available: S: between 4'11" and 5'5" M: between 5'5" and 5'9" L: between 5'9" and 6' XL: between 6'1" and 6'5" If you are on the limit between 2 sizes, we recommend following the exact size listed.


The stiff, lightweight ROCKRIDER XC frame has optimized geometry for physical performance. It was designed with shorter bases to leave space for wide tires. Made of triple-thickness 6061 and 6013 aluminum. Lifetime warranty on the Switch And Ride frame, single chainwheel only. 148 mm x 12 mm rear axle. "Press fit 92" bottom bracket. 31.6 mm diameter saddle tube. Compatible with double bottle cage (except in size S).

Front suspension

Obstacles no longer pose a problem. ROCKSHOX REBA RL front suspension with 100 mm of travel. Direct locking front suspension (in open or closed position) on the handlebar using the COMBO LOCK handle. Suspension compatible with 27.5" and 27.5" PLUS wheels.


Stay focused on your effort with this single chainwheel. SRAM NX drive train, 1x11 single chainwheel, for lighter weight, more precision, faster gear changing, and greater durability. 32 teeth, easily replaceable (up to 32 teeth) without changing the chain. SRAM PG1103 cassette with 11 cogs: 11, 13, 15 ,17, 19, 22, 25, 28, 32, 36, 42 teeth. The 42-tooth sprocket guarantees good gear reduction to help you climb the steepest sections

Handlebar / stem / steering / grips

Keep stable and find your attack position. Rockrider Comp Flat handlebar is 720 mm wide for more stability. The B'TWIN COMP stem is adapted to the size (60 mm in size S, 70 mm in size M, 80 mm in size L, and 90 mm in size XL). Semi-integrated headset with sealed bearings. Lightweight, "lock on" style ROCKRIDER 900 grips screw onto the handlebars

Saddle / seat post

Enjoy greater comfort when pedaling. The ROCKRIDER XC/AM saddle weighs 9.3 oz. The seat post is height-adjustable, with 4.7" of travel, and can be controlled directly from the mountain bike handlebars. The seat post is 31.6 x 400 to allow compatibility with telescopic posts.


The choice of double hydraulic disc brakes for incisive braking. Exclusive SRAM Level T hydraulic disc brakes with a harmonious collar at the handlebar. 180 mm front disc, 160 mm rear disc.


27.5" SWITCH and RIDE wheels: choose speed and inertia! SUN RINGLE Duroc 30 SRC Tubeless Ready wheels, with BOOST axles, in 15 mm at the front and 12 mm at the back. Inner rim width: 30 mm. Sealed bearings. Equipped with a watertight rim strip, Tubeless Ready compatible. To switch to Tubeless Ready: add a Tubeless valve, preventative liquid, and replace the original tire with the same model in Tubeless Ready (available in Decathlon stores).


Grip and move over all types of terrain. Hutchinson TORO 2 tires in 27.5 x 2.10 Versatile tires designed for riding on any terrain: smooth, rocky, dry, muddy... Special studs to optimize steering, and sufficiently well spaced out so that they don't get clogged with mud when riding on muddy ground. High side knobs for good grip in the turns.


24.9 lbs in size S, without pedals. 25.4 lbs in size M, without pedals. 25.6 lbs in size L, without pedals. 26 lbs in size XL, without pedals. The weight can vary based on the tolerance of the components. The bike is supplied with B'Twin Flat Pro platform pedals. The complete bike (MTB + fully equipped rider) should not exceed 265 lbs.

User guide & bike assembly

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Warning - california prop 65

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Product testing

Please visit your local Decathlon store for any pre-purchase tests.

Storage instructions

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


Lifetime on frame and rigid fork. 2 years on parts.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual