Shimano M8010 Centerlock Lockring
CenterLock rotor mounts are our preferred method for attaching rotors to our hubs. It provides even pressure across the disc rotor, so it's less likely to warp due to uneven torque and it's simply faster and easier to install and remove. The XT M8010 Centerlock Rotor Lockring is perfect to keep in the toolbox just in case you might need it on a trip. The lockring is compatible with 12, 15, and 20mm axles and Centerlock rotors and requires an external BB tool to torque the lockring to the hub.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Mfg PartNum: Y2A598030
Brake Type: Disc
Hub Compatibility: Center-Lock
Discipline: commuting, cross-country, cyclocross, downhill, enduro, gravel, mud/sand/snow, road cycling, time trial, trail, triathlon
Brake Parts: Rotor Mounts
Brake Pad Type: Disc
Used these to secure SRAM 160mm Centerlock rotors on a new set of Easton EA 70 650b rims. This was after calling extremely helpful customer service to inquire. They recommended these lock rings as the only ones that would fit on the Easton hubs. They were spot on, simple to install, have the rotors secure, no issues and excellent support from biketiresdirect customer service!
I bought new wheels for my gravel bike this year. My wheels came with lock rings that use Shimano's cassette tool for installation. These didn't work with my bike's 15mm front axle since the tool didn't fit. I purchased this lock ring as it uses Shimano's bottom bracket tool for installation. This worked great with the bigger wheel axle. Installation was a breeze when paired with a torque wrench and the Shimano BB tool.
This is exactly what you need to lock a disc rotor on your hub. You need to make sure that there's enough room between the lock ring and the fork. Often you need the thinner version for the fork.
I wish I had read the previous review about needing space on your fork. Indeed I tried this on two separate road bikes and it does not fit either forks. It feels like this will be a super common problem as one of the bikes was a gravel bike with all kinds of clearance for a 2.1 inch tire, but close to the hub there was not enough clearance for this lockring.