Shimano xtr m9000 tubular mtb wheelsetthe all new xtr m9000 wheels mark a serious turning point for shimano in premium mountain bike wheelsets they are shimanos most advanced mountain bike wheels to date and also the first featuring carbon laminate rim technology new xtr m9000 series wheels are even more focused at each end of the spectrum from ultra light and durable race wheels to all mountain tuned trail wheels all new xtr wheels use 28 butted spokes both front and rear and include a new