[masraum]

Originally Posted by hughc

I'm glad this thread was started as I am about to replace the rear tires on my SC. They are 245's and badly worn in the centers, as if over inflated, yet I've kept them at 34 lbs as per sticker recommendation. So now I'm thinking I should inflate the new tires at 32 lbs but I'm not convinced that would make an appreciable difference.
Do you guys have any suggestions??
Thx
hughc

What size wheels are they on?

If you've got an SC with the standard 16x6 and 16x7 wheels, yes, 245 45 16s "fit" on the back, but they don't fit right and you're not likely to ever get good wear. If you've got 16x7" wheels on the back, go back to the stock 225 50 16 tires and you'll get better performance and wear. The problem is that the 245 45 16 are too wide for the wheel (you'd want a 16x8 or 16x9 for those) so the lips of the tire are pinched inward which causes the carcase to bow across the tread. It also means that the tires won't corner as well because there will be more movement/roll of the oversized tire.

If your rear wheels are 16x9 or maybe 16x8, then disregard ^that^.

My old '88 targa came with 245 45 16 on the stock sized wheels when I bought it. I had the same issues. I switched back to the stock tire size.