Miles Racing Semi Metallic Disc Brake Pads for new XTR 2011, M985, M988, Deore XT M785, SLX ab 2012, M666, M675, Alfine S700, Non-Series CX77, CX75 mechanical, Tektro HD-R510/515/517/R310 Semi-metallic compound provides strong initial bite and a consisent feel at the lever while braking A kevlar additive increases the brake pad's lifespan Has better heat resistance than organic pads from iron and copper in the pad material Compatibility: Shimano XTR BR-M9000, Shimano XTR BR-M9020, Shimano XTR BR-M987, Shimano XTR BR-M985, Shimano Deore XT BR-M8000, Shimano Deore XT BR-M785, Shimano SLX BR-M675, Shimano SLX BR-M666, Shimano Deore BR-M615, Shimano Alfine BR-S700, Shimano Cyclocross BR-CX77, Shimano BR-RS785, Shimano BR-R785, Shimano BR-R317, Shimano BR-R517 Recommended Use: mountain biking (downhill and enduro)