Tire fitment issues in the rear

[Panda Grahams]

Originally Posted by Yoshoobaroo

Is anyone going to try reasonable daily sizes/offsets? I have absolutely no interest in stuffing a 9.5” wheel in there, or doing any cutting.

Let’s see some cars with ~8.5 40ET, that’s a good bit more aggressive than stock and we frankly need better wheel selections in the 8-8.5” widths. I’m tired of being forced to choose between 7.5” ET45 and 9.5” ET30 with virtually no middle ground. The only wheel company I can think of that has a decent selection in that middleground is Enkei.

I don't have my car, yet, but I'm planning to run some 18x8+35 RPF1s. Hopefully it will turn out well.

[slipstream8]

Originally Posted by Yoshoobaroo

Is anyone going to try reasonable daily sizes/offsets? I have absolutely no interest in stuffing a 9.5” wheel in there, or doing any cutting.

Let’s see some cars with ~8.5 40ET, that’s a good bit more aggressive than stock and we frankly need better wheel selections in the 8-8.5” widths. I’m tired of being forced to choose between 7.5” ET45 and 9.5” ET30 with virtually no middle ground. The only wheel company I can think of that has a decent selection in that middleground is Enkei.

I have 17x9 ET 35 Wedssport TC105N with Yokohama AD08R 245/40R17 I will be trying. The car is due sometime in January.

[sds]

Originally Posted by Yoshoobaroo

Is anyone going to try reasonable daily sizes/offsets? I have absolutely no interest in stuffing a 9.5” wheel in there, or doing any cutting.

Let’s see some cars with ~8.5 40ET, that’s a good bit more aggressive than stock and we frankly need better wheel selections in the 8-8.5” widths. I’m tired of being forced to choose between 7.5” ET45 and 9.5” ET30 with virtually no middle ground. The only wheel company I can think of that has a decent selection in that middleground is Enkei.

I'm planning on Advan RG-4, 18x8.5 +44, with 245/35/18s. I feel like that's the perfect combination.

It's a shame it won't look as "concave" as the 18x9.5 options, but I also don't think it makes sense to put 9.5s on a street car with ~210whp. If you track, go for it.

[eyeballs]

I've got a set of 17x8 +40 konig ultraforms and 225/45 yoko v601 sitting in the basement to go on in spring. Not mounted up yet, so I'm unable to test fit.

[timurrrr]

Originally Posted by Yoshoobaroo

Is anyone going to try reasonable daily sizes/offsets? I have absolutely no interest in stuffing a 9.5” wheel in there, or doing any cutting.

The reason it's important for the community to figure out how to fit the widest wheels/tires possible and determine the "optimal" offset for that is that once that's done you can do a bit of math, and figure out the optimal offset for clearance/fitment for any narrower wheel/tire.

From what I understand so far, fitting anything wider than 9", or even the 9"s will be a challenge. That's a major letdown, given that the 1st easily fit 17x9 wheels in the back, and it was a very common size among people who went to tracks, or just wanted a good fitment.

Another factor here is that a lot of people already had wheels for the 1st gen and you can't just use spacers to fix the geometry; you have to buy new wheels, at least in the rear.

Originally Posted by Yoshoobaroo

Let’s see some cars with ~8.5 40ET, that’s a good bit more aggressive than stock and we frankly need better wheel selections in the 8-8.5” widths.

I’m tired of being forced to choose between 7.5” ET45 and 9.5” ET30 with virtually no middle ground. The only wheel company I can think of that has a decent selection in that middleground is Enkei.

There were enough of 17x8 options (at least for me; notably from König), but 17x8.5" were indeed uncommon.
Trust me, it was even worse when it came to wheels that clear Brembo's. That's another reason why I eventually decided to get 17x9's.

I think et40 will be slightly too little for 17x8.5" in the rear, and my bet is the et43–et47 range instead.
And then in the front you'll probably need et30-ish to match the fitment

Originally Posted by slipstream8

I have 17x9 ET 35 Wedssport TC105N with Yokohama AD08R 245/40R17 I will be trying. The car is due sometime in January.

IMO there's no way it's going to fit in the rear, sorry

[Yoshoobaroo]

Originally Posted by timurrrr

The reason it's important for the community to figure out how to fit the widest wheels/tires possible and determine the "optimal" offset for that is that once that's done you can do a bit of math, and figure out the optimal offset for clearance/fitment for any narrower wheel/tire.

Yea I get it, I just feel like there’s a n initial push to see what the biggest wheels that fit the car are, and once that’s done most suppliers/distributors just call that good enough and don’t look into more DD setups for normal cars. This happens for most car platforms I’ve been involved in. Finding stock-like widths with better offsets always turns into an experiment.

The track increase combined with the rear fender aero makes the rear wheel fitment significantly more aggressive than the front. I think this gen we’ll see more people running spacers in the front only, or more aggressive spacers up front.

[DarkSunrise]

Originally Posted by Yoshoobaroo

Is anyone going to try reasonable daily sizes/offsets? I have absolutely no interest in stuffing a 9.5” wheel in there, or doing any cutting.

Let’s see some cars with ~8.5 40ET, that’s a good bit more aggressive than stock and we frankly need better wheel selections in the 8-8.5” widths. I’m tired of being forced to choose between 7.5” ET45 and 9.5” ET30 with virtually no middle ground. The only wheel company I can think of that has a decent selection in that middleground is Enkei.

I'm going to try 17x8 +42 Wedssport TC105N and 17x9 +42 Apex ARC-8. Both with 235/40/17 tires. Only problem is my BRZ isn't due to arrive for a few months with all the delays

[OkieSnuffBox]

Originally Posted by slipstream8

I have 17x9 ET 35 Wedssport TC105N with Yokohama AD08R 245/40R17 I will be trying. The car is due sometime in January.

Why? The previous page literally says that size they need to cut the rear and front fenders?

Originally Posted by Yoshoobaroo

Yea I get it, I just feel like there’s a n initial push to see what the biggest wheels that fit the car are, and once that’s done most suppliers/distributors just call that good enough and don’t look into more DD setups for normal cars. This happens for most car platforms I’ve been involved in. Finding stock-like widths with better offsets always turns into an experiment.

The track increase combined with the rear fender aero makes the rear wheel fitment significantly more aggressive than the front. I think this gen we’ll see more people running spacers in the front only, or more aggressive spacers up front.

I believe Forgestar makes custom wheels for at pretty decent prices. They are "flow formed" so not a fully forged wheel. But they also aren't $3600 a set like BC Racing.

[slipstream8]

Originally Posted by OkieSnuffBox

Why? The previous page literally says that size they need to cut the rear and front fenders?

Sorry, I guess that didn't click in my head.

Do we know if any combination of camber and/or switching to 235s might squeeze in? If not, I'm sure there is a first gen owner out there who would love to have a nice set of lightweight wheels.

[Simmons]

Seems like a lot of talk about what fits, and what doesn't.
I am on 17x9 45 offset with 245/40/17 A052 that run wide. My car is lowered pretty good and I have no rubbing on the rear. I chose to run 5mm spacer up front to match.

Right now front camber is -3.5 rear is 2.4-2.8 I also tried -4.8 front.

Ride height is 13" hub to fender. Easiest way to measure this is to first measure the wheel and divide by 2. Then hook the tap measure at the bottom of the wheel and measure to the fender....then take that number and subtract the number you ended up with from half the wheel.

Simmons

[OkieSnuffBox]

Originally Posted by Simmons

Seems like a lot of talk about what fits, and what doesn't.
I am on 17x9 45 offset with 245/40/17 A052 that run wide. My car is lowered pretty good and I have no rubbing on the rear. I chose to run 5mm spacer up front to match.

Looks great!

It would also really help if people shared some additional information:

- Camber front and rear
- Height from pinch weld/jacking point vs stock so we can compare exactly how much a car is lowered, front and rear

[DocWalt]

What you actually want are hub to fender measurements. Pinch weld to ground is affected by tire OD.

[Simmons]

Originally Posted by OkieSnuffBox

Looks great!

It would also really help if people shared some additional information:

- Camber front and rear
- Height from pinch weld/jacking point vs stock so we can compare exactly how much a car is lowered, front and rear

Added to my post

[timurrrr]

Originally Posted by Simmons

I am on 17x9 45 offset with 245/40/17 A052 that run wide. My car is lowered pretty good and I have no rubbing on the rear.
[...]

Right now [...] rear [camber] is 2.4-2.8

Can you drive one of the rear wheels on something like a curb or a ramp, and take some photos from behind?