Best rim+tire combo close to stock?

[Summerwolf]

http://www.ft86club.com/forums/showthread.php?t=116090


Throwing this guy out there. The offset is different, but width etc etc seems to be what you're looking for.

[yelsew]

Originally Posted by Vital

what tires are you running?

Firestone Indy 500, check out my journal in my sig for pictures and some other thoughts on them.

[Keenercarguy]

Good to know that the 245/40 Indy 500 fits on a 17x8 well, I may try it out next.

[mrg666]

I am using 225/45-17 Yokohama tires on stock 17x7 rims which is within specs of this tire size. There is absolutely no disadvantage, pinching whatsoever. I only see the benefit of better traction which is especially needed with a supercharger and a slightly better shock absorption. Grain of salt: the advantages I see are relative to the stock 215/45-17 Bridgestone Turanza tires. I am planning to go with 245/40-17 on 17x8 +45 rims next, again within recommended specs of the tire and car.

Unless there is a significant increase in power, I think 225/45-17 is ideal for our cars; 245 width will make the car look faster but go slower.

[leevanf]

Originally Posted by mrg666

I am using 225/45-17 Yokohama tires on stock 17x7 rims which is within specs of this tire size. There is absolutely no disadvantage, pinching whatsoever. I only see the benefit of better traction which is especially needed with a supercharger and a slightly better shock absorption. Grain of salt: the advantages I see are relative to the stock 215/45-17 Bridgestone Turanza tires. I am planning to go with 245/40-17 on 17x8 +45 rims next, again within recommended specs of the tire and car.

Unless there is a significant increase in power, I think 225/45-17 is ideal for our cars; 245 width will make the car look faster but go slower.

Thanks! But what if I actually plan to stay all stock.
I just want to lighten the car but maintain my odometer/speedometer measurements. Shouldnt I basically stick to a 17x7/7.5 rim amd 215/45 tire?

[mrg666]

The effective diameter of a tire decreases in time as they wear out. 225/45 has ~2% larger diameter than 215/45. So speedometer reading will be that much lower and become closer to true value in time. 215/45 starts closer to true value and become higher in time. It doesn't look like a difference that matters to me. I preferred the ride quality and grip of 225, actually 225 was cheaper and had a wider selection. The weight difference is negligible but some tires are lighter than others. I think Yokohama was lighter than Michelin. As you see, it comes down to personal decision but it won't make much difference. Good luck.

[SuperTom]

Originally Posted by mrg666

The effective diameter of a tire decreases in time as they wear out. 225/45 has ~2% larger diameter than 215/45. So speedometer reading will be that much lower and become closer to true value in time. 215/45 starts closer to true value and become higher in time. It doesn't look like a difference that matters to me. I preferred the ride quality and grip of 225, actually 225 was cheaper and had wider selection. The weight difference is negligible but some tires are lighter than others. I think Yokohama was lighter than Michelin. As you see, it comes down to personal decision but it won't make much difference. Good luck.

Most likely wont be that noticeably but using the gear ratio calculator the difference between 215 and 225 makes the new 4.3 gears act like 4.24. Again not a huge difference but almost half the change from 4.1 to 4.3. And you can feel the change in the 17's vs the older models.