Originally Posted by
Mulberry20
The prior two posts are proof positive you should take internet advice with a grain of salt.
There is no way in hell you can or should run 28 tires on wheels of that era and width.
They will not seat properly even if they can be mounted at all.
The fact it is a 3 mm difference is totally irrelevant. A 28 mm tire will likely size 29 or 30 nowadays.
I am a mechanical engineer I should know.
complete BS, 28mm will fit the rims just fine.
only fitment issues is if brakes and frame will fit 28mm (tight fists have had to let air out to get through the pads, but once there need to ensure clearance)
and tire vary widely in exactly how they measure once inflated...some are under, some are over and a very few are exact
and clearly you don't know