Material: stainless steel Attachment Type: 6-bolt Compatibility: 6-bolt Diameter: 160 mm, 180 mm, 203 mm Recommended Use: mountain bike At the end of last season, you promised yourself you'd finally buy some fresh rotors in the spring, so don't put it off. If you're running 6-bolt disc bakes, grab the Shimano SLX RT66 6-Bolt Rotor and make sure you'll be able to stop consistently on the muddy, rough trail conditions you're bound to encounter in the early part of next season. A steel construction promises durability without a hefty price tag, and strategically carved mud-shedding slots throughout the rotor's body help your pads stay cleaner and less crusty on wet days.