hey i have and old road bike with 27 x 1.25 rims and i was wondering if i could put bigger tires on it, because i cant seem to find any cyclocross tires in 27 1.25 but i found a really nice pair in 27 x 1 3/8.

would they still fit or would that half of a cm be to big???

also if i cant do this can anyone suggest a reasonably priced set of cyclocross tires in my bikes size?