Help with wheels and tires

[SilEighty91two40]

I Have just purchaseda set of Racing Hart s15 wheel and Pirelli P7000 tires but I want to be sure they will fit. The Lug pattern I know will fit b/c the wheels are 4x114 and so is my car. The rims have a 40offset. The tires are Pirelli P7000 205/40/17. Someone please let me know if these will fit on my car.

[SmithSR]

What suspension do you have? 205/40-17 is shorter than stock wheel/tire overall diameter. This will alter effective axle ratio, speedometer and odometer. The wheels are how wide?

*gasp* you paid money without test fitting? Buyer beware.

[Checkered-Member]

*gasp* you paid money without test fitting? Buyer beware.

I was thinking the same thing….

It will fit on the car, and the tires should fit without a glitch unless you bought 8” rims

[stillmatic]

I'm running the same tire/wheel setup and they fit just fine on my car. I believe 205/40/17 is the cheapest size tire you can buy for 17" wheels.. You can get the Kuhmo ECSTA 712s for only $340 at tirerack. I was gonna go with the recommended tire size which is 205/45/17 but my brother just couldn't wait to show off MY rims so we went with Bridgestone Daytona 205/40/17s for $400 at a local Wheel Works shop. Your speedometer will be 3 mph off (running 67mph @70mph) and a lot of people will bug you to drop the front a little but you don't really have to. Take a look at mine (Pic 1, Pic 2).

Also, the manager at the wheel works shop recommended either a 215/40 or 215/45, which actually fits better (no spacers needed) and is more accurate than a 205/40. I was told that my tires would not last long so make sure you get either 205/45, 215/40 or 215/45 next time you buy new tires for your car.

[Grant@tirerack]

A 205/40-17 is darn short. You would have to run those at almost max. air pressure just to match the load rating of the stock tires at 29 psi. The 45 series is much better.

[Ceptos]

is a 45 series the only option for matching the stock diameter, or can you go to 50? i know about the affect on gauges if you increase/decrease overall diameter, is a 50 enough for this? is there any other affect to the car?

what is the method for determining the best tire width relative to rim width? i was thinking when i go to buy wheels i would get an exact fit so the contact patch is flat and the sidewalls can do their job, but im still looking into the exact affect of a wider tire on a rim.

[Grant@tirerack]

A 50 series would be too tall on a 17" fitment. If you stay with a tire that is within 3/10" in O.D. you will be fine in most cases when it comes to spedo error etc... you are going to change that much wearing down the stock tire treads. The best rule of thumb is to stay within a 1/2" of the rim with and tread width. If you get too wide for the rim the tire sidewall will not have as much support and will tend to roll more in corners. Q45Tech had a great post on this a few weeks back. Try searching under rim width for related threads.