If you mean the sprockets and the Taper-lock bushings, there is nothing in the literature I could find or in my parts bins to look at. The sprockets I do have, for 21mm wide belts(the next width down), have the bushings nearly flush with the backside of the sprocket. If this is also the case with the 36mm sprockets, you won't pick up any overlap room with the bearing. To be sure, you'll probably have to look at the actual sprocket and bushing you intend to use.Anybody know about the sprockets and hubs if they nest into each other? Tried to ask a distributor this question but got no response. This will tell me how much room I will need and how far forward to install new motor plate.