You won't need to cut up your wheels to use these pulleys, These are slightly different than the ABEC Flywheel and Clone series due to the difference in the urethane shape and the depth to the back of the wheel on the MBS wheel.

Our Wheel Pulleys can be installed as in picture below (the bolts are blocked by the tight holes of the pulleys, we don't suggest to use bigger nuts, they can wear off the inserts very quickly) Wheel pictures are for reference only.