Uses six 10-32 x 2.5" or 10-24 x 2.5" machine screws + hex nuts.
I've printed these and the fit is better then the original file plus the teeth on these are full depth. I've printed 36,40 and 50 to confirm fitments and they all work and sit nicely up against your wheel. Pictures of the 40T. The origial file is "tested with 90mm Flywheels, 90mm clones, and 83mm clones -- in general, most of the clones will need the "thick" version of the pulley and retainer models."
Internal clearance is 24 mm diameter at the lowest point on the nuts.
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