Indeed, the SunRace MX8 11-speed cassette is also suitable for Shimano freehubs with 8, 9 or 10 speed record included. There is nothing difficult in the installation: you have to put the cassette on the freehub so that the biggest spline is placed in the corresponding slot. On the other hand, should such grooves cause difficulties during the use of the cassette, one can file the grooves with the barest amount of tension. The cassette is secured with a locking ring with a torque of 40 Nm.