Quote Originally Posted by trobbo View Post
When fitting tyres to rims, manufacturers give you a range of recommended rims widths that can be used.

I like to squeeze the sidewalls in, to fit tyres onto a narrower rim rather than spread them out, to fit a wider rim.

A tyre on a narrower rim is less likely to fall off the rim at lower pressures. For example I run 34 x 10.5 tyres on a 7 inch rim and have never had problems with tyres falling off rims even at 10 or 12 psi.

Personally I would not put a 30 x 9.5 on an 8 inch rim as I think the risk of debeading the tyre is too great.
who makes a 34x10.5 tyre, its an unusual size. have you got a pic of it on the vehicle ?