This MTB is designed for getting started with Cross Country MTB (XC). You'll have a great time training with this XC 50 MTB with an aluminum frame, SRAM SX 1x12 drivetrain, Sun Ringle 29" wheels and Rockshox Judy 100 mm fork.
"Breaking in" your brakes
Switching your wheels to tubeless
To reduce the risk of your inner tube being punctured or pinched, you may want to consider making the wheels on your MTB "Tubeless". To do this, you will need to buy puncture prevention liquid (tire sealant).
1. Remove the wheel
2. Remove the tire and inner tube from the wheel
3. Apply rim tape (sealant tape) to the rim
4. Insert a Schrader Tubeless valve through the rim hole (from inside the rim)
5. Apply tire sealant (puncture prevention) liquid
6. Install your new tubeless tire
7. Fully inflate the tire until it presses firmly against the rim.
If you find it difficult to perform this operation, please visit your nearest Decathlon workshop and have this done for you.
Adjusting your fork
To properly adjust your Rockshox fork, see the instructions on the following link:
Have a problem?
A wheel is bent
The first time you ride your brand new bike, it's normal for many of its components to move about slightly and settle into their proper places. This is the case of your wheel spokes which you might hear make a "cracking" sound which is naturally due to the residual torsion built up during assembly. Your bike is equipped with sturdy double-walled rims (on the inside of the wheel), so your wheels should be straight and not bent. In the unlikely event a wheel is or becomes slightly bent or twisted, please bring your bike to any Decathlon workshop and they will make the adjustment free of charge, either: 1- As part of the free tune-up available within 6 months of the date of purchase of the bike. 2- Covered by the extended repair warranty, if purchased (good for 2 years).
Repairing a flat
Unfortunately, a flat tire is something that can happen to any of us. Terrain (thorns, brambles, glass, nails, etc.) and specific bike use (jumping over obstacles such as rocks, steps, curbs, potholes, etc.) are the most common causes of flat tires due to a puncture (small hole) or pinching (small grooves close together). On the other hand, if a flat tire is a frequent occurrence, this could be because:
- the bike was improperly assembled at the factory, leaving the tip of one of the spokes exposed, which is puncturing the inner tube.
- The tire or the inner tube is faulty (porous)
- A previous puncture was improperly repaired and a foreign object (thorn, bit of glass, metal shard, etc.) got into the rim or the tire.
It's important to properly diagnose the flat and make sure the tire and wheel rim are free from any foreign objects before doing the repair.
How to remove/install a tire and repair/replace an inner tube:
1- The simplest is to leave the wheel alone and temporarily fix your flat using puncture repair tire sealant: Screw the end of the sealant tube onto the valve of the flat tire (valve should be in the lower position) and squeeze and hold to inject the foam into the inner tube. The tire should become full and firm once more, allowing you to get back home safely.
2- If you've purchased our breakdown insurance, you can have your tire repaired at any Decathlon workshop.
The fork is too stiff
There are a couple of things you can do to "soften" your fork:
1- Perform a basic maintenance operation: you can regularly care for your fork with a small oil can. Simply put a few drops of oil on the fork pivots and work the fork to help the oil penetrate into the blades.
2- Have a full maintenance tune-up done at the workshop.
Rear gears do not shift properly
There could be several reasons the chain isn't shifting properly between cogs on the rear cassette:
1- Check the position of the cable housing end caps (tips). Incorrectly positioned cable housing caps can hinder the pulling action on the derailleur cable and cause the shifting of the gears to be off. If a cable end cap is incorrectly positioned, put it back in its place.
2- The cables or the housing could be locked up .If the chain isn't shifting down to the smallest cogs, and the rear derailleur doesn't move when activating the shifters, then the cable and/or the cable housing is almost certainly locked up. In this case, the cable and housing need to be replaced.
3- Bring your MTB to a Decathlon workshop to have the derailleur adjusted.
4- To adjust your SRAM derailleur, use the SRAM DERAILLEUR ADJUSTMENT TOOL. This tool allows you to adjust the distance between the upper roller and the cassette.
5- Also check that the derailleur hanger is not bent. If it is, refer to the "YOUR DERAILLEUR HANGER IS BENT" section PS: If you regularly ride your MTB in wet or muddy conditions, or if you regularly wash your bike with lots of water, then your cables and cable housing will need to be replaced more frequently. Washing your bike using a high pressure hose is highly discouraged as it can push dirt and dust into the cable housing.
The brake lever touches the handlebar too easily before braking starts
Your brake lever is too easy to squeeze and/or touches the handlebar before braking action begins, you need to purge your brakes. Please visit a Decathlon workshop to have this done by one of our technicians.
Your derailleur hanger is bent
A bent hanger causes the derailleur to be out of alignment and therefore unable to function correctly. Stand behind your bike and check the alignment of the derailleur. If the hanger is bent or broken, please visit your nearest Decathlon workshop to have the derailleur hanger replaced. You can also replace it yourself by following the instructions in this video tutorial.
Your chain has broken
Caring for your bike