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Rockrider XC900 Carbon Mountain Bike 29"
Give it your all with the XC 900 mountain bike with rigid carbon frame. Get to the finish line faster with the ROCKSHOX REBA RL 100 mm frame, MAVIC Crossmax wheels and SRAM GX EAGLE 1X12 drivetrain.
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San Francisco, 735 Market St. Options
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About this item:
- Light weight custom molded carbon frame
- Rock Shox Reba RL 100 with remote Lockout, Front Suspension Fork
- Sram Eagle GX 12spd Drivetrain
- Mavic Crossmax Tubeless Ready Disc Aluminium MTB Wheelset
- SRAM Level T Brakes with 180/160 Rotors
- 23.1 lbs (10.5 KG)
- 5 Year Warranty on the frame
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Product Features

Efficiency
12-speed SRAM GX Eagle, Tubeless Ready wheels
Lightweight
Give it your all: full carbon frame and seat post (frame: 2.4 lbs in M)
Shock absorption
Overcome obstacles with the Rockshox Reba RL 100 mm self-locking fork.
Braking power
Enjoy powerful SRAM Level T dual-piston brakes with 160 mm discs.
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Product Customer Reviews

very well equipped for the price, lack of maneuverability compared to some 29 inches of the competition
Very good mountain bike and yet bought used at Decathlon st maximin
I used to always buy top brand bikes and I opted to give rockrider a chance. I'm impressed with everything. Only one negative point for the assembly in the store. The bike came out of tune and with poorly tightened parts.
Really a great mountain bike, light, pleasant riding, great look, value for money more than top👍
Overall the bike has good comfort, is light, the position is good. the shortcomings are a seat post that is too short the 4 cm are missing due to the shortening of the seat tube (I had to buy a 400mm seat post); braking that lacks bite; the tires which if they have a low rolling resistance are just adapted to very rolling tracks that are not very technical; the assembly of the dry pedals without the washers provided is noted; finally the mounting of the tires which forced me to redo the rim tape to switch to tubeless while the mavic wheels are provided for. In conclusion: The bike is good, it could have been very good.
Braking is really not at the level of a bike of this range! It's not my first mountain bike but this is really pathetic, what a pity
Professional level bike, with top assembly, unbeatable price
Broken chain which damaged the frame on the first outing but excellent reaction from the store. Since then I have been completely satisfied with this MTB which climbs walls, is comfortable enough for a semi-suspended, very pleasant to use and it is also very attractive. According to other comments, the brakes are indeed not very sharp but I have never been bothered by a lack of efficiency. Gears shift well. About €400 cheaper than competitors and the only one in this range that I have found available in this time of shortage. This model is at the end of its life but its replacements seem in the same line. I have only done about fifteen outings of 25 to 35 km in hilly terrain for the moment but I can only recommend it.
I am very happy with this purchase. Mtb with excellent value for money
I have been driving for 1 year and 1600 km on this XC900 and I am very satisfied with it. It gives good sensations and goes everywhere. Kraken tires are fine but don't go into the quagmires. They allow short stretches of road without wearing out the studs. After 1600km, everything is still original. The first thing to change will surely be the chain, I think around 2500km. The revision of the fork will also be done soon but no malfunction. The driving position is quite low with a stem at -20 degrees. I may evolve towards -10 degrees but you quickly get used to this kind of fairly offensive driving...
I bought this bike a long time ago and its performance has been MUCH MORE than expected.
Excellent MTB but I think the tire equipment (Hutchinson) needs to be reviewed. 4 punctures in 3 outings.
In my imagination, decathlon bikes are good little inexpensive bikes for basic cycling use. Buyer for quite a few years of brand-name bikes, both mountain bikes and road bikes, I let myself be tempted by this XC900 which was available in stores. After a few kilometers on the handlebars, huge slaps, I misled myself on Decathlon's ability to get us a great bike for a contained price (for this category). Responsive, lively, the impression of riding alone, nothing but happiness.
the behavior of the bike is very good, very responsive. only downside: very fragile tires
Used on trips up to 50 km
Size Guide

Additional Product Information
Composition
Bike frame : 100.0% Carbon fibre
Guarantee
5 years on the frame, 2 years on the parts
Origin
Imported
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
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Research and development
delivers high-quality cost-effective products
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State-of-the-art production processes
minimize manufacturing costs
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Optimized supply chain
reduces retail prices
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Minimal retail footprint
lowers overhead and indirect costs

Rockrider XC900 Carbon Mountain Bike 29"
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.