Did you ever find your offsets? This will determine how wide you can go, especially out back. Those wheel widths can accommodate a wide variety of tire widths. The following most common combos will work depending on offsets~
245/35/20front & 275or 285/30/20rear. If your current 255 rear tires are close to the fender edge you might have to still go with that size. If that's the case you could run a 225/40 front and 255/35 rear so both tires would be a stretch mount but would have close diameters.
Hopefully you can get those offsets posted before you order tires, don't want you to be disappointed again.
Might have some other tires to consider once you get the offsets up.
Brad

 

Okay Brad

This is what I found on the inside of the wheels

Front: laser inscription - 12.05.05 c04 2090 +20 5x114.3 SN CB 73.1

On the inside of the spokes:

MAX OVERALL 814 MM.
9.0J x 20H2

VVS-CV4

SAE J2530
ETRTO


Rear: laser inscription - 13.02.26 c04 2005 +25 5x114.3 SN CB 73.1

On the inside of the spokes:

ETRTO
SAE J2530

VVS-CV4

815KG

10.5J x 20H2

this is all I can find on the inside of the front and rear rims. Hopefully my friend you can find the answers that are needed for me to buy the right tires,

thanks for all your help Brad.

Nick

 

Your fronts are 9 inch wide with a +20 offset and the rears are 10.5 with a +25 offset

Mean set up

 

Yep, that would be what you have^^^ There's a couple tire combos you can go with~A 235/35/20 or 245/35front & 265/30/20rear would be an easier fit, especially in back. A 245/35/20 & 275/30/20 will be tight back there so you may have to trim your rear fender bracket. Depends if you are lowered, and if you want to run a bit more negative camber. At stock height I wouldn't run wider than the 265s.

 

Thanks guys.... I'm lowered on Eibachs only. And I'd rather not have to get into trimming wheel areas and running negative camber. It sounds like the easy way out but I'd rather just put the tires on the rims, have them balanced and put them on the car. And of course have no problems with them afterwards. So which is the best size for me and any ideas about good tires that are reasonably priced?

I've always liked the Yokohama S.Drives and the Hankook Ventus v12 evo12.

 

Lowered on Eibachs you could probably run the 275/30/20s but might have to trim your rear fender bracket, there's not much in the way of tires in the 265 sizes. You can also do what member Ryne did, run 255s all around on staggered wheels, he never had any issues and worked well for him. Here's his build thread for more info.https://www.myg37.com/forums/build-t...g37-coupe.html And here's Tireracks listing for those tires, plenty of choices there~ Tirerack link Those Firestones on closeout are a pretty nice deal FWIW and they have the Ventus Evos w/ a $100 rebate

 

Hey Brad,

Is there an instructional video or a step by step how to do it with regards to trimming the fender bracket? I have heard of it before but have no idea how to do it. I'd really like to know how to do it so I have more options when I grab new tires.

Thanks

Nick

 

Nick, This is the only thread I found, and the pics are so old only a few will work https://www.myg37.com/forums/wheels-...r-bracket.html Might give a closer look at Ryne's setup w/ 255s all around, might make your life a bit easier (maybe), lol.