Does anybody know the reason the newage Group N cars run 18" x 8" wheels instead of say... 18" x 8.5"?

It's strange because as we know, the newage shell GDB accepts up to 8.5" wheel width (as seen on RA-R, S204) with the correct offset without any modification to the archs. Why did they (Group N teams) fit an 8" width wheel? Is there some rule or regulation that limits Group N tarmac cars to 8" width wheels?

Even weirder is them fitting the GRB shell with 18" x 8" as well, when every model (except the base type uk and base JDM model) comes fitted with 18" x 8.5" wheels standard.

 

Fellas?

Moderators, anyway to change the title to "Why don't they fit 18" x 8.5" wheels to Group N cars instead?"

Maybe the title doesn't attract enough attention.

Anyone from Prodrive?

 

Hi matey have look at this pdf
http://www.subaru-impreza.org/downlo...20prodrive.pdf

 

And again i have looked at one PDF where are listed all parts,but new hatchback use 15" not 18"

 

Yes, mate. Seen that. I've gone through most of the Group N brochures. And AFAIK, all of them states 18" x 8" wheels.

It doesn't answer my question of why won't they use 8.5" wheels instead. But appreciate your reply mate.

 

Look at this part list maybe help
http://www.subaru-sti.co.jp/e/GPN/parts/index.html

 

15 = gravel
16 = snow
18 = tarmac

I think you should ask FIA why they dont use a wider rim...