Originally Posted by
biker128pedal
Wider rims will make the tire of the same size wider and taller.
Marginally wider, more square, and shorter.
Think about it, he's not adding material to the tire. He isn't creating something from nothing.
How much wider and how much shorter? From what I've seen, enough to make me think I've done something big when I changed rims. Once the calipers come out, it's like a milimeter.