As you ride, and as you come into contact with obstacles, the tension of your spokes can change, which can lead to buckled wheels.When you start using your new bike, lots of its parts are going to wriggle around as they settle into place. One such part is the spokes, which can sometimes be heard pinging. This is caused by the residual twist from assembly. Your wheels should not be buckled in any way at all. If they are, let your local Decathlon workshop know when you take your bike for its free service (six months after purchase) so that they can adjust it for you.To true your wheel yourself, you'll need a spoke wrench, a truing stand and a wheel alignment gauge (although you can get away without the last two).Position your bike on a workstand or turn it upside down. Take your wheel off and remove the tyre and inner tube. Put the wheel (without the tyre) back on the bike or on the truing stand, then stand in line with the wheel. Spin it and check that it stays aligned with the bike's frame as it turns. If the wheel seems to go up and down, this is called a "hop", whereas if the wheel seems to wobble side to side, it's described as "buckled".To true the wheel, simply tighten or loosen the tension of the spokes where the buckle or hop is. If you need help, our Decathlon workshops will be happy to true your wheels.