Overhauling my Le Tour, I need to replace the worn front 52t chainring and the chain, but the 6 speed freewheel seems in good shape, and works well with the suntour alpha-4050 RD (I got it shifting really nicely). So I would prefer to not replace it. I've been looking around and the NOS Shimano BioPace components look excellent and within my price range. I've searched on the forum but didn't get a clear answer on wether or not the Shimano components would be compatible with the Suntour RD and Freewheel. Please let me know. If this needs to be moved to mechanics, that's fine, I just figured since old components, I would post here.