Federal stance xl bmx rimthe federal stance xl rim has a wider 40mm cross section that is designed to be in keeping with modern tyre sizes which helps the tyre maintain its correct profile the triple box section combined with the wider profile makes the rim both stronger and stiffer than conventional rims and also helps to reduce the possibility of pinch flats the wall thickness where the spokes are located has been increased by 22 to reduce the possibility of spokes pulling through the rim