: 18" wheels/tires for rear AND front



WA 2 FST
07-06-12, 11:22 PM
Ok, not trying to be sarcastic... but was wondering if anyone had put 18s all the way around on the Gen 2 car? I realize the front brakes are significantly larger than the older cars, so it may not work. ????

Was considering Nitto NT05 in 275/40-18 for front and Nitto NT05R 285/40-18 in rear. These are very close to the diameter of the stock 19" wheel/tire setup on the cars (rears would actually be 1/2" taller than front, which is fine with me). I think the car would look ok, as the older cars had 18s and looked good, and the standard CTS has 18s, too, if I'm not mistaken.

Car going into the shop next week for some upgrades that should put me ~560+rwhp. Would like to have traction on the street. I've had good success with Nittos. I realize it isn't the stickiest of the DRs, but it has the least compromises in the handling of them, for sure.

(mods... maybe this should be in "performance"... I don't know?)

thebigjimsho
07-07-12, 03:34 PM
The rolling diameter compared to stock does not matter. But having rolling diameters front to back does. So I wouldn't run those sizes, personally. But, depending on the wheels, 18s WILL fit all around.

WA 2 FST
07-07-12, 04:22 PM
I understand... and don't understand your point. Obviously, keeping the diameter very near stock means speedo calibration isn't affected, and no programming has to be done. The 275/40-18 is only .4" shorter than stock and 26.66" diameter. The 285/10-18 is right at 27" tall, which makes it .2" taller than stock. So front to back, we're talking a difference of about .3". Why do you believe this would create an issue? Again, i'm not being sarcastic... I just don't understand, that's all. I personally think it is absurd that the car comes with a front tire that is slightly taller than the rear tire. (again, about .27" difference).

thebigjimsho
07-07-12, 04:45 PM
I don't know if it would create an issue, if that small. But, at some point, it will. And I don't know where that is.

Chrispy
07-08-12, 07:20 AM
Just run 285s all around then you can rotate tires.

I'm ordering TSW Nurburgrings 18x9.5 for winter wheels. Offset is 40mm. They are a pretty lightweight wheel and guys have run big tires front and back.

Cheers
Chris

WA 2 FST
07-08-12, 09:25 AM
Chris,

So 285s will fit up front? Cool... didn't realize that. Do you have any pics of these on a V? Thank you, sir!

thebigjimsho
07-08-12, 10:47 AM
I'm running 275/35 18 track tires which are about the same width as the stock 285s. They fit, although they have more clearance with a smaller rolling diameter. On those TSW wheels Chris mentioned...

Chrispy
07-09-12, 04:38 PM
I haven't personally fitted the 285's so can't guarantee they'll fit. It sounds like 275's are a safe bet unless you want to try them and maybe run a smaller spacer if required...

Darnell
07-11-12, 02:33 PM
I'm running 275/35 18 track tires which are about the same width as the stock 285s. They fit, although they have more clearance with a smaller rolling diameter. On those TSW wheels Chris mentioned...

Could I run a 305/45/18 on the rear of a Coupe?

WA 2 FST
07-11-12, 03:02 PM
That's a very tall tire...2" taller than stock. If a 305/30 would fit, I'd think a 305/45 would, but it may screw up somethings like stated above

Darnell
07-11-12, 04:06 PM
That's a very tall tire...2" taller than stock. If a 305/30 would fit, I'd think a 305/45 would, but it may screw up somethings like stated above

Think the extra two inches would pose a problem a track/drag setup? I ask because this weekend I discovered that I have a pair of Nitto drags with40% or thread left on them from my Lightning.

WA 2 FST
07-11-12, 05:10 PM
I was going to say... those are the tires I had on my Lightning before I sold it to my son. :) I don't know if it will be a problem if only for the drag strip. It will kill the gearing in the car, but if you have a lot of power, it may not matter.

thebigjimsho
07-11-12, 11:40 PM
Those are pretty tall. In a straight line, I'd think you'd be fine...