if your all about high tread wear then stay away from out stones. They are a 140 treat rating. Thats super low. the mich Pilot sport PS2 is a great tire. Great grip better wear rating then the stones. But also more costly.

 

thanks for the recommendation boss - im willing to pay extra $$ for better treadwear....

 

Hey just wondering if I get 19x9.5 wheels all the way around can I put those on the stock 19" tires on sport model or would I have to get new tires. I know the staggered look is more prefered but it's not an option in this rim package I'm thinking of getting.

 

yes you could fit the oem tired on but the 225 front is going to be a little narrow of a tire for a 9.5 rim. while it will work with no driving problems you risk rim damage from a curb...

 

meaning the rim would stick out some right, thats what I had thought. What tire size would you recommend for those rims.
thanks

 

yes the rim would stick out a little farther then the tire. If you want a staggered tire combo you could run the oem rear 245 on the front and buy a set of rears you could go anywhere from 255-275 width with no issues....

 

Do you think that would look ok
If I do a 255 or 275 for the rear would that give the apperance of a staggered wheel set

 

yes if you have the 245 up front with a 275 rear. that would look nice

 

I think it was on pirelli's site, but also the rim calculators all showed this same result. Take the back tire for an example: It is 245/40-19 (9inch rear rim). If I put a 275/40-19, I would think it makes no difference in overall diameter of the wheel/tire combo. Apparently it does though. The 275 would be slightly bigger diameter, enough to be off by about 1mph on the speedo and raise the car about .3inches. Now you can offset that by doing 275/35-19. I hadn't realized that before, but now I'm thinking 275/35-19 or 265/35-19 would be perfect for the rears with a 245/40-19 on the front.

Thoughts?


Edit: Some numbers

Rear diameter = 19inches + (245 x .4)x2 ( convert the mm to inches, etc) = 26.7 inches Outer Diameter of wheel/tire combo... STOCK

Option 1: Rear Diameter = 19inches + (275 x .4)x2 = 27.66 inches Outer Diameter

Option 2: Rear Diameter = 19inches + (275 x .35)x2 = 26.57 inches

As you can see, the 275/35 combo is much closer to the original OD, so no needed adjustments to the speedo.

For anyone that didn't already know this (I just realized this, so excuse me if you knew it already)... Tires will be listed usually as follows: 275/35ZR19 (98). I hadn't realized that the (98) is actually the 275 x .35 calculation, basically the high of the sidewall in millimeters. So take the 98x2 + 19inches converted to mm and you get the OD. So since you know the stock tires are 98 mm, just find tires that are 98 and you'll at least be keeping the same OD with the stock rims.

The one part I still don't understand is going too big or too small on the width of the tire compared to the width of the wheel. Since we have 9 inch wide wheels with 9.65 inch wide tires, I would think anything more then 10.5 inches would look bad and not drive right. If you got 10.5inches, that means you'd have .75 inches of overhang over the rims edge. Wouldn't that also effect the stability of the tire/rim combo in cornering? Seems like If you want to go 10.5 inches or 11inches wide on tire ( which I want ) you'd need to go 9.5 or 10 on the wheel width as well. Ahh, questions questions..


I'm pretty certain 10.5 inch wide tires with 10inch wide rims would look really sweet on our cars. You would prolly want a 9.5 or 10 inch wheel in the front then. Expensive upgrade....eek

I guess the real question is, how much is too much for performance and for looks on tire overhang on the rim. Stock is .325 inches overhang.

 

you are correct.

 

Here is a link to the best tire size calculator I have ever seen. You put in the stock dimensions and the new proposed tire size and it will give you the difference in dimension and MPH change. I have been using it for years to figure this kind of stuff out.

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

 

That is a cool calculator and visual representation, however, no one has really spoken to my question of wheel width vs tire width. As you can see a 275/35-19 would stick over the rims a considerable amount more then stock. Is there any information available as to how much overhang is too much?

 

a 275 will not hang over the rim much at all. here is a 275 rear on my 9.5 m3 rim....

 

Well, yeah that doesn't look bad I'll agree. However the g37 has 9inch wide rims, not 9.5, so it'll stick out another 1/4 of an inch then that. I guess thats fine , as long as the tire is rock solid stable on the rim and doesn't wobble or roll.

 

correct. but the poster i was giving the information to original is looking at a 9.5 rim. but you could still run a 275 with no adverse effects on a 9. if your worried go with 265