Wondering if it is really necessary to buy a smaller belt for running down to a 3.4" pulley. I am deciding between a 3.5" or 3.4" pulley at the moment. I believe that the ZZP site suggests the smaller belt for the 3.5" pulley (but doesn't seem mandatory).
Anyone have experience with this that can chime in? Will I get belt slip if I don't go smaller?
Thanks