I tried to install one yesterday on my disk wheel on my motorbike. My motorbike is an old beach cruiser. The chain is now too close to my seat stay (it rubs it). The Vendor does mention in their ad that some mods may be required for clearance or straight chain line.
I will be trimming the disk hub a bit to fix my clearance problem.
-If my motorbike used a disk compatible frame (instead of an old beach cruiser), there would have probably been no clearance problem.
-The vendor (King) sells the sprockets with an additional half inch of offset for ten dollars more that would have eliminated my clearance problem.
I would buy one of these again. I just didn't do enough homework before ordering.