Square 18 Rim Set Up

[BIGBREW]

After thinking about going to a 19” rim, I’m afraid I’ll bend them in my roads.

What’s good 18” square set up?

Can you play with offset any to be able to use a wider tire?

 

[Snicklefritz]

the oem offset of the 8" wheels, both sizes of od, is 34. you can get an 8.5" wide wheel in there with an offset of 40, but that's with a 19" wheel and a 225 tire, an 18" wheel is going to rub sooner being closer to the strut. if I were going square it would definitely be with 18" wheels and I would go 8.5 wide with 245 tires and keep the 34 offset or maybe go a tad less. I'd get a pro involved with the measurements just to be sure, because each brand and style of rim can vary the clearance tolerances.

 

[BIGBREW]

the oem offset of the 8" wheels, both sizes of od, is 34. you can get an 8.5" wide wheel in there with an offset of 40, but that's with a 19" wheel and a 225 tire, an 18" wheel is going to rub sooner being closer to the strut. if I were going square it would definitely be with 18" wheels and I would go 8.5 wide with 245 tires and keep the 34 offset or maybe go a tad less. I'd get a pro involved with the measurements just to be sure, because each brand and style of rim can vary the clearance tolerances.


If staggering is easier Im open. Just think I need to stay on an 18 with my roads the more I think about it.

 

[JSolo]

Running 245/40/18 tires (as in my sig) on the stock 18.0 wheels on the gtline. No rubbing.

Sorry, don't have a good angle.

 

[Volfy]

We've got 4 sets of 18" wheels between the G70 and Stinger. Two sets are Enkei TFR 18x8.5 ET 38mm. Front offset is corrected with 5mm spacers to within 1mm of the stock 34mm. Rear offset isn't as critical, so we left them at 38mm, which is inbetween the stock setting of 34mm for 18x8 and 45mm for 19x8.5.

My son drives the G70 with 255/40R18 A/S on the TFRs. Clears the front strut, even without the 5mm spacer, so you might be able to go 265 on 18x8.5 corrected to factory 34mm offset, if you really want to push it.

The other set of TFRs is our track set, which currently have 245/40R18 track tires on. I expect those to need replacement later this season and will go to 255/35R18 track tires. The rolling diameter will be smaller, so not a good tires size for street use, but optimized for track duty.


For daily commute, I drive the Stinger with 235/45R18 on a set of 18x7.5 Genesis OEM wheels from my old '09 Genesis sedan.

You might think it strange to run rims that are narrower than the stock 18x8. The reason is more than the fact I just so happened I have them. The 18x7.5 wrapped with 235/45R18 is far better protected than the stock 18x8 with 225/45R18. Take a look at your own wheel/tire and compare to the pic below. If and when my wheel takes a pothole hit, the deformed tire will tend to wrap around the wheel rim, thereby cushioning and protecting it, rendering the rim much less likely to be bend. The added bonus is these old Genesis wheels are surprisingly lightweight, at around 23 lbs. The stock 18x8 weighs in at 30 lbs. All else being equal, lighter is always better.

No, this setup will not corner like a Formula race car, but for street wheel/tires that will encounter all manners of public roads, I much prefer this compromise. Handle well enough for spirited driving and the ride quality is like magic carpet... almost as good as my old Kimchi Mercedes.

 

[Snicklefritz]

We've got 4 sets of 18" wheels between the G70 and Stinger. Two sets are Enkei TFR 18x8.5 ET 38mm. Front offset is corrected with 5mm spacers to within 1mm of the stock 34mm. Rear offset isn't as critical, so we left them at 38mm, which is inbetween the stock setting of 34mm for 18x8 and 45mm for 19x8.5.

My son drives the G70 with 255/40R18 A/S on the TFRs. Clears the front strut, even without the 5mm spacer, so you might be able to go 265 on 18x8.5 corrected to factory 34mm offset, if you really want to push it.

The other set of TFRs is our track set, which currently have 245/40R18 track tires on. I expect those to need replacement later this season and will go to 255/35R18 track tires. The rolling diameter will be smaller, so not a good tires size for street use, but optimized for track duty.
View attachment 78077

For daily commute, I drive the Stinger with 235/45R18 on a set of 18x7.5 Genesis OEM wheels from my old '09 Genesis sedan.
View attachment 78080
You might think it strange to run rims that are narrower than the stock 18x8. The reason is more than the fact I just so happened I have them. The 18x7.5 wrapped with 235/45R18 is far better protected than the stock 18x8 with 225/45R18. Take a look at your own wheel/tire and compare to the pic below. If and when my wheel takes a pothole hit, the deformed tire will tend to wrap around the wheel rim, thereby cushioning and protecting it, rendering the rim much less likely to be bend. The added bonus is these old Genesis wheels are surprisingly lightweight, at around 23 lbs. The stock 18x8 weighs in at 30 lbs. All else being equal, lighter is always better.

No, this setup will not corner like a Formula race car, but for street wheel/tires that will encounter all manners of public roads, I much prefer this compromise. Handle well enough for spirited driving and the ride quality is like magic carpet... almost as good as my old Kimchi Mercedes.
View attachment 78081

and, you can enter car wash tunnels with complete assurance that the guide rail will not scrape your rims, double win.