Originally Posted by
courtleigh
based on these photos, should I try a 28mm tire? I'm sure the ride can be done with a 25...
Looks like you have room for a 28, if the current (pictured) tire is actually 25mm. Maybe even can fit a 32, since some of them measure closer to 28mm.
There's no way to know for sure without actually trying, unless you have the tire in hand, in which case you can lay it flat, measure casing width from bead to bead, add inside width of rim, then divide by 3.14 to determine a close approximation of mounted diameter.