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.
Bull****. Road rims 13mm wide between the bead hooks used to be very common and people ran 28+mm tires on them all the time without issue. It can be done, I've done it.
"Those who say it can't be done should stay out of the way of the people who are doing it."