I've been trying to put off buying new tires until I actually have money, but I can see the sidewalls on my current set about to give way. I had been thinking of buying a set of Big Apples, but it now occurs to me that they will be significantly wider than my current Kenda Kwests. How much fatter are they? I want to keep my fenders, and there's not all that much clearance as it is. Thanks in advance for any help.