rocknferoza wrote:think there 15's
I heard somewhere that wearing on the edges can be caused from over inflation
The tyre place card says 23 psi which I believe is 2 low
I run 30 psi in the feroza and got no wear problems with my 235/75r 15 inch muddies
Hi mate, I've got a short-wheel base Grand Vitara 1.6.. .on 15"s as Greg likes to mention

... I'm running Cooper Discoverer ATs and the guys at TyrePower recommended I run them at 40PSI which I've been doing (well, sort of... I've been keeping it between 35 and 40).
Overinflation will wear tyres in the middle, not the edges... underinflation (and steering which isn't properly aligned) will wear tyres on the edges, that and throwing the car around corners.
I had Bridgestone H/Ts on the Terios and I found that they tend to roll a bit around corners at recommended pressures... now I'm running Bridgestone A/Ts at the same pressures and they handle beautifully with no apparent uneven wear.
First thing I would recommend is remembering to rotate the tyres around twice a year (or more frequently if you do a lot of Kms)... second thing is get a steering alignment (always ask for a printout with the before and after... and ask them to check the camber as well to see if it seems OK or not) and maybe check wheel balance.
Hitting potholes, gutters and things like that will set the steering out and if you knock the rims will set them out of balance as well...
Hope this helps!
Cheers,
Luis