ben951

Ok, so i just bought myself some new wheels for my 86 951, 7.5 up front and 9.5 at back, but now i need to get some tyres for them, and i dont know which size would be best, i dont know anything about tyre sizes, and to be honest, all those numbers confuse me, but i did some research and i think that 215/40/17 will fit the front ok, and 255/40/17 for the back.

Do you think that these will fit and be ok, or has anyone got some better suggestions as to what would work.

Thanks

Ben

Cory9584

usually when you go wider you have to drop the height a little, so you may want 35 series tires in the back

JE_951

im running 245's on a 8" wheel. may want a 265 or even 275...

EVOMMM

I had 225/45/17 in front and 265/40/17 for the rear but lots of rubbing these were toyo
swiched to 225/45/17 255/40/17 P zeros so much better lots of clearence but also not as wide

ben951

thanks, did you have those size tyres on the 7.5 and 9.5 wide rims?

shiners780

Here is a chart I have used to determine the proper size tire for a particular size wheel:

http://www.toyo.com/tires/tire_specsheet.cfm?id=1

Note that this chart is for the Toyo RA-1 tire. Not all tires are available in all sizes. You can either choose a tire, then pick an available size to fit your wheel. Or you can choose a size, then pick a tire that is available in that size.

Your front to rear wheel size differential is fairly large. Personally, I wouldn't go less than 225 up front, or more than 255 in the rear. Too little tire in front with too much tire in back will exacerbate the car's inherent understeer characteristics.