Tackelbarry

I am looking to upgrade my wheels and tires on my G37x. From my research, it appears a 255/45/18 will fit fine on a 8.5” rim. What off set, if any, do I need for the rims? Also, can I go wider, and if so, what width rim and offset? Mine is the X model so I want to keep everything squared, no rubbing, and not stick out beyond the fender. I am going with 18” rims to keep the cost down. Thanks.

projectpanda13

iTrader: (2)

even though you have an awd, you have the option to go staggered as long as you keep the front and rear diameters within 1% (example: 245/45R18 fronts and 275/40R18 rear, both at 26.7 inch diameters)

For a sedan, if you have an 8.5", offset somewhere between +25 to +35 would be nice. I had 8.5" with 245 up front, and I did need to roll the fender lip, but i was also very low.
9.5" with offsets in the +35 to +45 is a good fitment without poking and you could do 255 also.

i currently have 9.5" +15 and there is poke in the front and definitely in the rear on the sedan.

Tackelbarry

I would like to put Michelin pilot sport AS3+ in 255-45-18 on all four corners. My car has the stock ride height and suspension. Any recommendations on specific rims I can consider ? Thank you for your help.

projectpanda13

iTrader: (2)

its hard to recommend wheels since everyone's taste is different. I will say check out Enkei and Konig. They are quality companies and priced well for most of their wheels. I am running Enkei RPF1 on my car.
Any reason you want specically 255/45?

Tackelbarry

When comparing the 255/45/18 to my stock tire they were pretty close in diameter so I figured the speedometer would be close. I also wanted to put on the widest tire possible without getting away from my stock suspension or having to use spacers. From what I have been able to find it says an 8 1/2” wheel is ideal for a 255 tire. I am guessing I will need a +40-45 offset. Can you think of anything else? Please feel free to correct any information that I posted. Thanks again.

projectpanda13

iTrader: (2)

i understand that you chose the 255 based on it being the ideal section width for a 8.5" wheel. May I ask why you have choosen specifically a 8.5" wheel width? What's you budget for wheels also? You budget will help narrow down the wheel selection.
I bought my RPF1 in 18x9.5 +15 and 18x10.0 +38 new from RCA Garage for $1300 shipped, as a reference.

These Enkei TS10 are under $1000 shipped. the width is 9.5" and offset is +35, so tires, you can still go with a 255/40R18 if you'd like. This will fit very ncie on the sedan.
https://www.ebay.com/itm/4-18x9-5-Gr...4AAOSwk2lfyXZt

Here are the same wheels in a 18x8.5 +25 for the same price
https://www.ebay.com/itm/18x8-5-Stor...0AAOSwnidgGito

Tackelbarry

I am looking at 255 because I was told it was the widest tire I could run without it sticking out past the body. I am looking at an 8.5” wheel because I was told it is the correct match for the tire allowing the tread to contact the ground properly. Ie. Not stretching or bunching the sidewall.