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Rockrider XC100, Mountain Bike, 29"

Sale price: $1,499.00 Regular price:

Discover cross-country MTB: its frame with XC geometry, the 100 mm Manitou Markhor fork, and its single chainwheel SRAM NX drive train will carry you wherever you want, as quickly as possible.

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Sale price: $1,499.00 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8550569

Product Features

A photo of the Rockrider XC100, Mountain Bike, 29" in use

Rockrider XC100, Mountain Bike, 29" | Designed for XC mountain biking. This responsive and lightweight triple-butted alloy XC frame begs you to push harder and faster.

Discover cross-country MTB: its frame with XC geometry, the 100 mm Manitou Markhor fork, and its single chainwheel SRAM NX drive train will carry you wherever you want, as quickly as possible.


Manage your energy: SRAM NX 1x12 drive train and 29 inch Boost wheel


6061 and 6013 aluminum frame with Cross Country geometry


On the 900 Series XC handlebars, the TEKTRO brakes give clean, accurate braking.

Shock absorption

Cushion all impacts: 100mm MANITOU fork, easy to lock & unlock on your handlebar

Questions & Answers

Product Customer Reviews

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8 Reviews
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Rockrider XC100, Mountain Bike, 29
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Very good mountain bike

I bought the XC 100 a little over a year ago. I biked over 500km with it since then in Michigan and I really enjoy it. I am originally from France and knew Decathlon since I was a child and always loved their products at affordable price. I was so pleased when they opened in the US. The weight is low, the maneuverability is good in all different type of trails. It brings a lot of confidence when riding more technical areas. I wish the Switch n'ride wheels would be available in the US to try it with the 27"5+ wheels. Hopefully it will come soon here.

rockrider xc100 review

The bike was worth the price, I love it.

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best xc bike ever

yup this is my honest review this mtb is beast wonderful powerful machine and the geometry is the exactly design for normal body i never feel any pain of 4hours ok biking i hope next time they dont higher the price cos this bike consider a hi end bike thank u xc100

Hi Rod,

Thank you for taking the time to review our products. We are pleased to hear that this bicycle meets your expectations!

We look forward to more of your reviews and sharing! Plus, the new Decathlon app has been launched and you can now purchase all your favourite sports goods with just a few clicks on your smartphone! Yes, it's now available both in the App store and Google Play Store! Download now and happy shopping!

Thank you for your support and stay safe! :)

Sport on safely!


CSM Digital Leader

Surprisingly good.

I was very skeptical to purchase this as the brand is unfamiliar to me. But I have been using this for 4 weeks and it has been very sturdy. Quality is amazing, it is very satisfying to use. Would love to check out more in the future.

Hi James ! 

Its nice to know that the XC 100 20" RR CN FR is a bike that you are growing to like. Guess you must be whipping some trails in Singapore with your new ride. Well come down by the DECATHLON stores to see the new range of Mountain Bikes that we have. Maybe you might just walk away with another ride ;)

Keep Riding Always =)

Ride Along The Wind",
Cycling Sports Leader |BTWIN | Van Rysel | Triban | RockRider | Singapore Lab

muy buen producto costo beneficio

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Hola deportista.

Nos alegra saber que te guste la variedad de artículos deportivos que tenemos para ti, nuestro equipo trabaja para ofrecerte los mejores precios del mercado

Saludos deportivos.


sistema de cambios SRAM NX muy malo

El sistema de cambios SRAM NCX viene con fallo, se saltan mientras uno sube

Hola Gustavo.

Lamentamos el inconveniente ocasionado, recuerda que puedes acercarte a cualquier de nuestras tiendas a nivel nacional para efectuar la reparación o garantía del artículo. Recuerda acercarte con la factura y el artículo, si no tienes la factura pero estás fidelizado con nosotros tus compras quedan registradas en nuestro sistema y no será necesaria la factura, en recepción solo deberás indicar tu correo electrónico para que el asesor pueda hacer efectivo el proceso de cambio. 

¡Un abrazo deportivo!

Ana Isabel
Excelente bicicleta


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Muy ligera buenos componentes


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Size Guide

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Additional Product Information


Bike frame

  • 100% Aluminum

The story of the rockrider 900 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 mountain bikers. We have designed and tested this XC100 mountain bike for mountain bikers who want to surpass their limits and ride even faster when cross-country mountain biking.

A unisex mountain bike

Men's or women's mountain bike? The Rockrider XC 100 mountain bike is unisex.

Choosing my mtb 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.

A frame designed to combine fun and performance

For the XC100, our teams have specifically designed the frame in T6 6061 and 6013 aluminum (only 4 lbs in size M). It has been specially designed to meet the needs of those wanting to get started with cross-country riding, very demanding in terms of durability and low weight. 92 mm Press-fit bottom bracket Oversize diagonal tube Conical tapered head tube Available in 4 sizes: S/M/L/XL

Front suspension locks/unlocks on the handlebar

To overcome any obstacles you encounter, the Manitou Markhor Air fork and its 100 mm travel will always be there for you. Quickly lock and unlock the fork with the 2-position Combo Lock locking system on the handlebars. 29 mm aluminum conical pivot, 38 mm taper, for increased rigidity and low weight. Axle: 15 x 110 mm

Derailleur and drive train: single drive train for optimal performance

The XC 100 inaugurates the new line of single-chainwheel SRAM drive trains. The SRAM NX 1x12 drive train ensures light weight, durability, precision, and better control of your mountain bike. Chainwheel size: 34 teeth, easily replaceable (up to 36 teeth) without changing the chain.

Handlebar, stem, grips: keep control

Since cross country requires good control of your steering position, we equipped this mountain bike with an oversize low rise Rockrider XC100 Series handlebar (slightly curved). Its 680 mm width guarantees good stability and optimal comfort when steering. The ROCKRIDER XC stem is adapted to each size (60 mm in size S and M, 70 mm in size L and XL) Semi-integrated headset with sealed bearings. ROCKRIDER 900 light lock on grips.

Saddle / seat post: comfortable and sporty seat

Our designers have developed the new Rockrider 900 Series saddle to be lighter (only 9.3 oz) and more comfortable during pedaling. With a 31.6 mm diameter and 400 length, the B'Twin Comp seat post offers a wide range of adjustments and a raised riding position.

Double hydraulic disc brakes: incisive braking

The exclusive 180 and 160 mm TEKTRO TKD 32 double hydraulic disc brakes will stop you in all circumstances. With their 2 pistons, semi-organic pads, and aluminum body, they combine power and light weight, essential for cross-country riding. For even more efficiency, the brake levers have been specially designed to be quickly manipulated with 2 fingers.

29" wheels and lightweight all-terrain tires to withstand xc rides.

The Sunringle Duroc 30 wheels made of aluminum will carry you over all terrain. Lightweight and durable, their 29 diameter guarantees an excellent balance between handling obstacles, comfort, and maneuverability.


26 lbs in size S, without pedals. 26.5 lbs in size M, without pedals. 26.9 lbs in size L, without pedals. 27.3 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 total weight (bike + rider) should not exceed 265 lbs.

Compatible accessories

BASE AND SEAT KICKSTAND 520 CN (Model Code 8401256) SEAT POST CARRIER 500 (Model Code 8387783) FLASH MTB FRONT MUDGUARD - BLACK (Model Code 8327776) BABYSEAT 100 FRAME (Model Code 8486913)

Warranty information

"Lifetime warranty on manufacturing defects for all metal frames, rigid forks, stems, and handlebars 5 years warranty on all carbon frames and forks 2 years warranty on all other parts Excludes damages arising from normal wear and tear, misuse, negligence, and unauthorized modifications"



Warning - california prop 65

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Storage instructions

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

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