i know that this question has probably been asked a thousand times but i didnt see it on the lists of topics, so here it goes again, what is the biggest tire i can fit on my 2001 xterra, another question i have is with the wheels, is there enough clearance to drop to a 15" wheel or will that interfeer with the calipers, thanks

Oh man...

well since no one will probably answer do to the number of times that has been asked, i guess i will answer part of it. you can lower the wheel size to the 15. that iscurrently what i am running. other then that that, assuming the truck is stock, try to keep the tires to 265's