18" Tires

by **biggie** » Sat Dec 06, 2003 11:37 am

I just purchased 18" Lexani Krystal wheels for my '04 Black SE V6 Sport. I understand the stock diameter of the 215/55R-17's is 26.4", but it is width that concerns me. The place I purchased the rims from and tirerack.com recommend 225/45-18's because of the neglegable decrease in diameter, but I want to put on as wide of a tire as possible and was possibly thinking of purchasing Pirelli 235/40ZR-18's. Rgache mentioned that putting 235/45R18's added .1" in diameter. Does anyone know how the diameter of a 235/40-18 compares to a 225/45-18? Also, would 235 width be too wide? I'm sorry if my questions sound ammateur, but this is the first time I will be changing my stock tires/rims. If anyone else out there with an '04 has 18's, what tires have you decided to go with and why? Your advice would be greatly appreciated.

by **biggie** » Sat Dec 06, 2003 11:38 am

I forgot to mention that the width of the rims is 8".

by **Jackass-Jeff** » Sat Dec 06, 2003 11:50 am

i have 225 x 40 x 18 on my 18x8

by **biggie** » Sat Dec 06, 2003 11:55 am

Don't those tires leave you with a nice-sized gap from your tire to wheelwell? And won't it throw off your speedometer? Do you have any pics of your ride?

by **slingshot** » Sat Dec 06, 2003 12:16 pm

Look at this website to calculate tire size effects on your car (speedometer changes,etc). It is an awesome website.

http://www.miata.net/garage/tirecalc.html

by **Jackass-Jeff** » Sat Dec 06, 2003 12:53 pm

ill get some up soon. I'm working on a camera mount project right now =P probably tomorrow

18x8 offset +50 (offset brings the wheel closer to the strut, or pushes it out from the strut) but I'm on a 2002 so it may look different...

by **biggie** » Sat Dec 06, 2003 1:10 pm

I checked the tire calculator and there is a .1% difference in a 235/45-18 from stock and a -1.3% difference in 225/45-18 from stock. Both sizes have pretty close to the same diameter as the stock 215/55-18's. Which size would be a better fit for my 18x8's and for the car? Would the 235/45-18's rub at all?

by **Guest** » Thu Dec 11, 2003 10:04 pm

pfff...18's look plenty big

by **dabuda** » Fri Dec 12, 2003 6:55 am

i'm thinking of getting 235/40/18 as well...more manufacturers make this spec tire so it's usually cheaper...anyone have these for any brand?

18" Tires

18" Tires

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