The maximum internal width dimensions of our reacha models are as follows. They refer to the distance at the height of the wheel axle between two mounted Bow-Covers made of pre-consumer plastic. With mounted Bow Covers made of aluminium you have to subtract one centimetre on each side, as they slightly bulge inwards.SPORT SHORT standard: 63,5cmSPORT SHORT wide / SPORT LONG / SPORT PRO: 75,5cmSPORT XXL: 85,5cmYou can find detailed dimension pictures here.