If I want to run A 18x8.0-8.5 and 18x10 anyone know the magic number for the offset?

 

front should be around 65+ and rear should be somewhere around 70+ something for 18x10........

 

About +73 to +75 for the rear, depending on the tire you want to run. Tho, I didn't know Volks were available with custom offsets. Custom colors and custom combinations of PCD and already available offsets, but not custom offsets.

 

yeah they make cutsom offsets at no extra charge one of the coolest things about volk not like hre and kinesis

 

Volk do make "custom offset", unless its not in their application guide. ONLY s2000 need offsets this high. Most of their offsets don't go over 65. They don't have anything in the GT-C for that high of a offset. You need to look into HRE or Kinesis.

What are you trying to achieve with such a wide wheel? And high offset? How wide a tire do you want to put on your wheel? Is this for Auto X? Drag? Or just for bragging rights? You won't get any lip, the higher the offset, the smaller lip you will get.

 

I have a turbo S that doesn't hook up for crap maybe towards the end of 3rd gear and I am running a 9.5 in the rear with a 255. I figure I little more grip cant hurt. This is on low boost too only 9psi. Haven't turned it up sure it is a nightmare at 15psi.

 

Though I have seen I few S running no bigger then that in the rear making much more hp then 400hp. I would just like to have a little more traction. I those wide wheel do look sweet. I have two pairs of kinesis but they dont release offsetts so. I just miss the volks and my one set of k28 are crap. I destroyed them.

 

People are running 17x9 CE28N with 275 Toyo RA1s in the rear on the street. With 17x7.5 235 front. I think that can hook up better than some 285 street tires.

Also have you thought about LSD to help your engagement?