Zoot Katz wrote in message ...
snip
Bookmark the site and always check there bike answers.

www.sheldonbrown.com/tire-sizing.html

I used Tom Slicks at 1.4" on both wide and narrow rims. Rim width will
limit the size range available to you somewhat, but generally
speaking, any of the decimal-inch specified tires will fit.

You run into problems with fractional sizes - a 26" X 1½" is the wrong
size. Always double check the ISO spec.

Ditto on the reference to Sheldon's site. It explains a rather
peculiar area of bicycle nomenclature in a concise and clear manner.

FWIW: I've used 26 x 1.25" smooth "road" tires and 26 x 2.4" knobbies
on the same wheels interchangably.

Warren, your tires are just fine as long as they're inflated.

Jeff