tire quality has nothing to do with how true to size a tire is.

QUOTE=Mike Mills;9866953]I'd say something is wrong. If a 28 won't fit, a 25 is not likely to fit properly, either. They differ in diameter by only 3 mm (0.12"). That's only 0.060"/side and 0.12" diametrical clearance. That is not adequate clearance.

My guess - your "28 mm" is not truly 28 mm. Talke it back and get a better quality tire that measures true to size.[/QUOTE]