If you put a lot of miles on your bike, the parts will eventually wear out. After many miles, a bike chain will "stretch" and need to be replaced.

Technically, the chain isn't stretching, but rather the pins that join the links are wearing down, which causes the length of the chain to grow.

The importance of the brakes goes without saying so ensuring your brakes are well maintained and that you check the cables and the pads are essential. With the wheel off the ground, spin it and pull the brakes – it should lock immediately.

Needless to say, you should ensure check your quick release skewers are tight and in good working order and the hubs spin smoothly. Inspect the bearings for wear or damage, clean by wiping down any dirt.

First inspect the frame for any damage scratches, dents or cracks. Begin at the front of the bike, the head tube. This area includes the steering tube, the forks, and crossbar. Small cracks can appear quickly and may be repaired if not too extensive.