Bike components wear out through use and worn components may mean your bike doesn’t perform as well as it should, it isn’t as fun to ride or can even be dangerous. Your mechanic will check your chain, chain-rings, rear sprockets and cables to make sure you can shift gear smoothly, replacing anything that is worn. Powerful brakes are essential for your safety so cables or hydraulics will be checked and brake pads replaced. Headset, bottom bracket and hubs will also be checked - worn out or sticky bearings will only slow you down!