wayn05 wrote:The Traction Control model SR's came with 225's, the non-traction control models came with 205's.
I have 245's in my SR (non-traction control model) on the stock rims, they'll be fine mate.
Bad idea. I'll break a personal rule and repeat myself - because they can be fitted to 6" rim and inflated does not mean they (245s) will be "fine"
There is a direct performance relationship between rim width and radial tyre size/section width. Too skinny in the rim (as you have) means mushy steering, and generally poor handling. This is why the Tyre and Rim Association says 6.5" minimum for 245 section width.
A fitment which does comply with these standards is usually illegal in Aus. I say usually because, although I am not aware of any exceptions, there may be exceptions.
Sure, the wrong fitting won't trigger some cataclysmic problem, but that doesn't mean that it is "fine"
This is not a matter of personal opinion - it's fact. Here's an exercise for you - remove your 245s from your 6" rims. Refit the same tyres to 7" or 7.5" rims and inflate them to the same pressures. Drive around a bit. Push it a bit. If you can't feel the difference, your seat of the pants dyno is malfunctioning. I have done this in the past with other vehicles and .5" increase was detectable, 1" noticeable, and 1.5" a significant improvement.
Particularly in 17" there is a very limited choice in replacement tyres (225/70/17), so if that is the problem, suck it up and change the wheels. The price of four new steelies is chicken shit compared to the benefits.
You get better handling and all round performance and I would guess that the tyres will last longer (I've never kept track)
The free kick is that if plod puts your car through the wringer, an illegal tyre fitment is one less thing to get pinged for.