Yeah, those RE960 a/s are great tires. I have those on my Daily driver, and it really changed the way the car handled and felt on the road.

You say that like it's a bad thing to agree with me j/k

 

17x9

 

Thanks...I just wish there were more choices in 255/50/17

 

Anyone running 275/40-17 tires?

 

those have a much smaller diameter than the factory tires

275/40/17 = 25.66 inch diameter
235/55/17 = 27.17 inch diameter

 

So you're saying that probably wouldn't be a good choice. I guess I'll wait until I burn up my Nitto's and then get the Bridgestone Pontenza 255/50 tires.

 

I wouldn't do it. If you've seen any S197 with SN95 wheels & TIRES, that's what it will look like (albeit without the offset).

I think it would make your fenderwell gap much larger, and you would definitely have to retune your vehicle for the different diameter (not a big deal since you already have a tuner, but it is a deal for those without).

Another good tire is the Michelin Pilot Sport's (I have the A/S all season's, but there is also summer version). The tread rating for the A/S is 400, and I think they are in the same class as the RE960AS, but perhaps an even better tire than that. But, I am VERY happy with them. But, be prepared to spend some $$$ for them, as they are one of the most expensive tires made. Unless, of course, you find them on ebay, which is what I did

A lot goes in to your tire choice: brand, tread wear, all-season, etc. I suggest going to tire-rack and determining what type of tire you desire. I spent quite some time determining which tires to put on with my wheels, as treadwear was important, and so was the name.

 

So what is the diameter of the 275 50 17's?

 

27.83 inches

 

How to determine *approximate* diameter:

Tire size = x / y / z
x = width
y = % height
z = wheel diameter

1) x * y% = sidewall thickness in mm
2) multiply that number by 2 (to account for the other hemisphere's sidewall)
3) Divide by 25.4 (# mm in an inch)
4) Add z to this number

Or, go to tire rack, and look up your specific tire and tire size

 

If sticking with 17's, definately don't do 275/40's. Those are fox and sn95 tires, too small for 05+. 255/50's all around is good. 275/45's if you can find them all around would work. 255/50 and 275/50 staggered would work. If anyone needs it, I built a cool excel spreadsheet that calculates tire diameter, axle ratios, mph, rpms, etc. I'll email it to whoever wants it.