Dmr axe30 m30 praxis works axe30 m30 bottom bracket bearings are designed for use with a 30mm axle and dmrs axe cranks on a frame with a pf8692 bottom bracket shell features compatible with dmr axe cranks only for use with roadmtb frames with a pf8692 bottom bracket shell chromium steel design 30mm drive28mm non drivebuy dmr componentsfrom chain reaction cycles the worlds largest online bike store