The ztr iron cross 700c rim from stans no tubes combines a stiff 175mm rim depth a 20mm wide internal cavity and stans ultra low profile bead socket technology bst sidewalls to virtually eliminate pinch flats under some of the lowest tyre pressures you can run at 385g a rim the ztr iron cross disc rim will make your next cyclocross disc wheel build considerably lighter but able to handle all the punishment you can dish out the new ztr iron cross disc rims are designed only for use with