The air pressure level should be selected depending on the weight of the rider and the way the tyres are used. Generally speaking, lighter riders require less pressure, heavier riders more. We usually recommend choosing a pressure level somewhere between the recommended and the maximum pressure. The maximum tyre pressure indicated on the side of the tyre may not be exceeded. Tyres that are pumped up too much will tend to crack. Wide tyres need less pressure than narrow tyres. If the pressure is too low, there is a risk that the tyre will be crushed if driven over a sharp edge, e.g. a hole in the road or a lowered pavement. Therefore, check and set the pressure correctly on a regular basis.