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BRZ Second-Gen (2022+) -- General Topics General topics for the second-gen BRZ


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Old 11-07-2021, 06:55 PM   #1
timurrrr
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Exclamation Tire fitment issues in the rear

So apparently Subaru and Toyota changed the shape of the rear quarter panels in such a way that some of the tire/wheel combos common on 1st gen cars no longer fit.

@trippinbillies40 has posted photos of 255/40R17 tire poking out of the fender on 17x9 et45 wheels.
You read that right, poking on 45 offset wheels, meaning the typical 35–40 range wheels will poke even more.

He's still on stock RLCAs at ~-2.0 camber in the rear after lowering,
but by my estimation adding 0.5...1.0 of camber in the rear will only give you a couple of millimeters of extra room.

It looks like it's going to be a challenge to fit big tires on identical wheels front and back.
I anticipate some people will end up doing some cutting and wide body / fender flares in the rear to keep using the tires/wheels they used on 1st gens.
Some people might want to stick to 215 or 225 tires for a while until a more appropriate solution is found.

What can a proper solution be?
Shorter rear upper control arms? Fender rolling? Aftermarket hubs?

Subaru and Toyota, why would you do that to us?..
We'd be better off with the front suspension optimized for ~40 offset wheels, rather than the rear geometry optimized for 48 offset wheels

I'll let @trippinbillies40 and @CSG Mike provide more details, but wanted to start this topic in case someone is about to put down an order on a 2022 car, or take a delivery, or something; and this information is critical to their decision.

Last edited by timurrrr; 12-21-2021 at 12:59 AM.
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Old 11-07-2021, 07:51 PM   #2
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How much poke are we talking? If the tire is significantly stretched 8.5 ET45 could be a decent alternative for running 245-255 tires.
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Old 11-07-2021, 08:39 PM   #3
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Is it a poking only issue or rubbing issue?
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Old 11-07-2021, 09:07 PM   #4
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Is it a poking only issue or rubbing issue?
Both
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Old 11-07-2021, 09:39 PM   #5
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Quote:
Originally Posted by timurrrr View Post
So apparently Subaru and Toyota changed the shape of the rear quarter panels in such a way that some of the tire/wheel combos common on 1st gen cars no longer fit.

@trippinbillies40 have posted photos on FB of 255/40R17 tire poking out of the fender on 17x9 et45 wheels.
You read that right, poking on 45 offset wheels, meaning the typical 3540 range wheels will poke even more.

He's still on stock RLCAs at ~-2.0 camber in the rear after lowering, but by my estimation adding 0.5...1.0 of camber in the rear will only give you a couple of millimeters of extra room.

It looks like it's going to be a challenge to fit big tires on identical wheels front and back.
I anticipate some people will end up doing some cutting and wide body / fender flares in the rear to keep using the tires/wheels they used on 1st gens. Some people might want to stick to 215 or 225 tires for a while until a more appropriate solution is found.

What can a proper solution be?
Shorter rear upper control arms? Fender rolling? Aftermarket hubs?

Subaru and Toyota, why would you do that to us?..
We'd be better off with the front suspension optimized for ~40 offset wheels, rather than the rear geometry optimized for 48 offset wheels

I'll let @trippinbillies40 and @CSG Mike provide more details, but wanted to start this topic in case someone is about to put down an order on a 2022 car, or take a delivery, or something; and this information is critical to their decision.
How far did he lower the car?
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Old 11-08-2021, 02:10 AM   #6
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This one from Japan shows the damage to the rear

Owner: www.instagram.com/708_zc6/






Last edited by Lightened; 11-23-2021 at 02:56 AM.
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Old 11-08-2021, 02:30 AM   #7
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That sounds like 245/40/R17 on APEX ARC8 ET42 will not fit in the rear as well.
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Old 11-08-2021, 03:17 AM   #8
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Really would like to hear more about this. Hopefully some light modifying will allow go to wheel sizes to fit.
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Old 11-08-2021, 07:06 AM   #9
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Look like a lot of Gen 1 wheels will be on sale. Sucks if It turns out that square setup doesn’t work. I am OK if it just solved with rolled fenders
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Old 11-08-2021, 07:12 PM   #10
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Skip the 17's and 18's, grab up some nice 16's and life will be good
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Old 11-08-2021, 07:22 PM   #11
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Quote:
Originally Posted by Lightened View Post
This one from Japan shows the damage

Unknown wheel and tire specs





from this guy's instagram, he said he was on 265/35r18 on 9.5 in wheels with +45 offset and 15mm spacers, but he didnt say if the spacers were front/rear or both.
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Old 11-08-2021, 07:29 PM   #12
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Quote:
Originally Posted by Lightened View Post
This one from Japan shows the damage
Yeah, I saw that post before, but it wasn't clear what the issue was. Language barrier, all that stuff.

The rear looks pretty low to my taste, so I thought the owner just didn't set up the bump travel correctly (see video below), and the tires were hitting metal first before the bump stops were fully squished.
Well, it might still be a valid explanation, or at least a partial solution?

If only there was one language used everywhere and Japanese folks shared their findings on this forum, that'd be great for everyone...


Last edited by timurrrr; 11-08-2021 at 07:29 PM. Reason: Un-inlining the YT link
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Old 11-09-2021, 03:06 AM   #13
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Quote:
Originally Posted by MyHybridBurnsGasAndTires View Post
from this guy's instagram, he said he was on 265/35r18 on 9.5 in wheels with +45 offset and 15mm spacers, but he didnt say if the spacers were front/rear or both.
care to share the IG link?
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Old 11-09-2021, 03:22 AM   #14
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care to share the IG link?
instagram.com/708_zc6/

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