Don't fuck up the car's handling by just going for looks...a 215 tyre is too narrow for an 8.5" wide rim and a +35 offset will detract from handling....try and keep to +45 or greater. A 225 is OK for an 8" rim.
I suggest you talk to John Fowler Autosport 0416 105 911....

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No Subarus currently owned

it's all about stance and flat brim caps nowadays, don't you know?

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There's a hoon in every Typhoon

215/35R18s only have a load rating of 84, GC8s need 87 from memory, which means 225/35R18 would be required.

Steve you're much more restrained than I...

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Yo dawg....

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Ok.. so the guy that I want to buy the 18x8.5 +42 rims, running 225/35r18 tyres, said that I will definitely have no issues with clearance or the wheels sticking out of the guards due to the +42 offset and will not require any rolling of guards.

Any experts out there that can confirm this sound right ?

You will not fit any 8.5 inch wide rims on a GC8 without guard rolling and camber. Regardless of offset
There just isn't enough room under there.

They will fit, don't get me wrong, just not without some effort put in.

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Stretched wheels and crazy camber look good (sometimes) for the weekender, static display and for photo-shoots...


...but as a daily there are far more practical set ups.

17x7.5 +44



17x8 +45 - ENKEI RPF1


17X8 +45




17x8 +45 (245 Profile Tyre)


17x8 +45 (235 Profile Tyre) - Rota G Force

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MY01 JDM EVO VII - 230KW / 430NM @ 1.6BAR

Thanks Dan. I think I'll stay away from the 18x8.5 now after seeing those pics. I will now look for a 17x7.5 +44 as it will probably be the best for my everyday driving.

I like the factory look. I don't think there are many std STI's left these days in this condition.