I am just about to start a cafe build. I want to swap out the wheels and tyres, currently they are 120/90/16 rear and 3.58-19 front. I don't have the bike yet, as awaiting delivery, so took those figures from the net. My question is, how will I know what I decide to swap to will be a good choice? Is there a formula or set of rules which will help me decide whether the swap is a good decision in terms of improved handling? I am thinking of going either 17" or 18" front and rear, being equal sizes. I'm not sure on rim sizes yet.
