Tire fitment issues in the rear - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

timurrrr · 11-07-2021, 06:55 PM

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 ~-2.0º camber in the rear after lowering,
but by my estimation adding 0.5...1.0º 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.

Yoshoobaroo · 11-07-2021, 07:51 PM

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.

grst1 · 11-07-2021, 08:39 PM

Is it a poking only issue or rubbing issue?

timurrrr · 11-07-2021, 09:07 PM

Quote:

Originally Posted by grst1

Is it a poking only issue or rubbing issue?

Both

Blighty · 11-07-2021, 09:39 PM

Quote:

Originally Posted by timurrrr

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 35–40 range wheels will poke even more.

He's still on stock RLCAs at ~-2.0º camber in the rear after lowering, but by my estimation adding 0.5...1.0º 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?

Lightened · 11-08-2021, 02:10 AM

This one from Japan shows the damage to the rear

Owner: www.instagram.com/708_zc6/

zeroomega · 11-08-2021, 02:30 AM

That sounds like 245/40/R17 on APEX ARC8 ET42 will not fit in the rear as well.

Dylans47 · 11-08-2021, 03:17 AM

Really would like to hear more about this. Hopefully some light modifying will allow go to wheel sizes to fit.

grst1 · 11-08-2021, 07:06 AM

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

Midnightsky · 11-08-2021, 07:12 PM

Skip the 17's and 18's, grab up some nice 16's and life will be good

MyHybridBurnsGasAndTires · 11-08-2021, 07:22 PM

Quote:

Originally Posted by Lightened

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.

timurrrr · 11-08-2021, 07:29 PM

Quote:

Originally Posted by Lightened

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...

teppey · 11-09-2021, 03:06 AM

Quote:

Originally Posted by MyHybridBurnsGasAndTires

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?

Lightened · 11-09-2021, 03:22 AM

Quote:

Originally Posted by teppey

care to share the IG link?

instagram.com/708_zc6/

11-07-2021, 06:55 PM	#1
timurrrr Senior Member Join Date: May 2019 Drives: 2022 GR86 Location: Between Sonoma and Laguna Seca Posts: 1,676 Thanks: 2,111 Thanked 1,256 Times in 697 Posts Mentioned: 28 Post(s) Tagged: 1 Thread(s)	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 ~-2.0º camber in the rear after lowering, but by my estimation adding 0.5...1.0º 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.

11-08-2021, 02:10 AM	#6
Lightened Every Ounce Counts Join Date: Jul 2015 Drives: 86 Location: Earth Posts: 214 Thanks: 165 Thanked 204 Times in 90 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	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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11-07-2021, 08:39 PM	#3
grst1 Senior Member Join Date: Mar 2012 Drives: '94 Ford Aspire Location: NJ Posts: 299 Thanks: 88 Thanked 112 Times in 52 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Is it a poking only issue or rubbing issue?

11-08-2021, 02:30 AM	#7
zeroomega Member Join Date: Jul 2018 Drives: Supra MKV, FR-S Location: Bay area, CA Posts: 68 Thanks: 21 Thanked 55 Times in 24 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	That sounds like 245/40/R17 on APEX ARC8 ET42 will not fit in the rear as well.

11-08-2021, 03:17 AM	#8
Dylans47 Senior Member Join Date: Nov 2017 Drives: Scion FR-S Location: California Posts: 176 Thanks: 49 Thanked 41 Times in 24 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Really would like to hear more about this. Hopefully some light modifying will allow go to wheel sizes to fit.

11-08-2021, 07:06 AM	#9
grst1 Senior Member Join Date: Mar 2012 Drives: '94 Ford Aspire Location: NJ Posts: 299 Thanks: 88 Thanked 112 Times in 52 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	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

11-08-2021, 07:12 PM	#10
Midnightsky Senior Member Join Date: Sep 2021 Drives: 2022 BRZ WRB Location: Alberta Posts: 374 Thanks: 383 Thanked 159 Times in 102 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Skip the 17's and 18's, grab up some nice 16's and life will be good

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