The legacy wheel of the ksyrium family now gets wider rims and a stepped up finish for an improved ride qualitythe ksyrium pro has set new standards for modern wheel building its equally at ease on fast rolling terrain or mountain courses and for a couple of hours or an all day adventureenhanced rim designwere bringing in a new rim shape which is enlarged by two millimeters that might not sound much but when combined with 25mm tires it increases the air volume by 18 this extra volume mean