The tyres influence the ride feel of a bicycle unlike any other component. They shape and influence grip and greatly influence how easily and comfortably a wheel rolls. The exact combination of low rolling resistance, low weight, high traction and good puncture protection looks slightly different for every application. Established manufacturers combine contradictory requirements with style and offer their sportive profiles in a range of variants; including folding tyres, wire mesh, with or without additional puncture protection and even with different rubber mixtures. However, your first consideration before buying a tyre should be selecting the correct size for your bike, i.e. the wheel diameter and the tyre width that can be used in the frame and the fork. This is usually indicated either in inches (29 x 2.25) or as ETRO in millimetres (56 - 622).