dontbanme

Anyone running 265/35/18s on their C32/C55? I know the next plus side from the stock 235/40/17 is 255/35/18. The 265 is more of a common side and I wouldn't mind the wider footprint. Is anyone running the 265?

doom239

I Have 225/45R17 on my front and the rears are 255/40R17 Fit great on the stock wheels.

dontbanme

I am upgrading to 18s and want the biggest fit reasonable.

pww

I've got 18's now (8.5 and 9.5) and I have the stock 225 front and 245 rear. I'm getting a new set thats about to go on and I'm going to a 255 rear. Fitment depends entirely on your suspension setup and the width of your wheels..


and since I just realized you are getting my wheels, you can fit a 265 easily on a 9.5. If you wanted, you could run a 275. In terms of rubbing, I'm not sure how those would go, but seeing how the fitment isn't too aggressive, and you are on stock suspension, you shouldn't have to worry about it

dlwiser

I am... im running 245 front and 265 rear.... in a few days ill be at 275!

RLx02

I was running 275/30/18 on the rear with no spacers. I'm running 285 nitto drag radials now and they rub like a *****...I do not recommend going any wider than 275.

FrankW

i had 265/35/18 PS2... rub or not depends on how low your car is and what offset your wheel is.

pww

The wheels in question are 18x8.5 et32 18x9.5 et35

thtguy

I am running 235/40/18 in front 265/35/18 in rear on Mandrus Millenniums 8.5 front 9.5 rear.

Wait my sig says 235/45 265/40... I guess I need to go look and see what I am actually running.

thtguy

alright just confirmed
235/40/18 in front
265/35/18 in rear

dontbanme

Sweet...I am going with a 265 width. I guess there will be a marginal speedometer error. Thanks guys!

thtguy

I got stopped when my speedo said 75 the officer said his calibrated speedo was reading 81. He didn't give me a ticket. I then used a handheld GPS and my wife following in her car and my speedo was about 1 mph off above 80. below that it showed as spot on. I set cruise at 25, 35, 45, 55, 65, 70, 75, 80, and 85. at 80 on my digital readout the GPS said 80.5, at 85 on digital readout GPS said 86. All the others showed with in .5 of the speed on digital readout.

He stopped me because my rear fog light was on, said I had a defective stop lamp. I believe he made up the speed and that is why he didn't give me a speeding ticket. I think he pulled me over because my car looks a little 'hood and he just wanted to have a look to see if there was an easy bust!

dontbanme

I would rather not have speedometer error, but is a fat footprint brings me a low speedo reading, then it is a price I am willing to pay.

pww

This will show you the speedo error you will have, as well as the circumference difference.

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

I'll get back to you in a bit with the tire type too.

FrankW

as long as the diameter is within 2-3% of the oem diameter the speedo difference is not that much. 1-2mph off is not that bad.

i had 235 and 265 PS2 on my BBS RE previously. wider foot print = more traction/friction = crappier mpg. i'm sticking to 225 255 from now on. lol

Viper98912

I personally like the look of 225/40/18 and 255/35/18 and how it sits on the stock wheels, plus they are nearly identical in diameter (unlike the stock 245/35/18)

Zeebrock

Remember all tires are not the same size, look at these tires and the rpm (rev's per mile) on each of them. Size for size they are not the same.

Hankook V12
265/35 821
255/35 831
245/35 839

Bridgestone RE760
265/35 823
255/35 831
245/34 840

Pirelli PZero
265/35 820
255/35 826
245/35 849

The stock 245/35 Pirelli for example is way different to the Hankook 245/35 at 849 / 839 prm.

thtguy

Drove by a radar speed limit signs radar said 40 digital speedo said 40.