Alternate 18" Tire Size - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

StE92ve · 12-21-2021, 08:55 AM

I'm planning on a GR86 Premium with the 18" wheels. My only issue is the 215/40 tires. Our roads on Long Island are less than spectacular and I'm concerned the 40 series will get chewed up and give a most unpleasant ride. I'm thinking of removing the 40's right after delivery and selling them and going to a 215/45 with either Contis or Michelin Ultra High Performance A/S.

Is there a fitment issue with wheel well clearance?
Will the dynamics of the car suffer greatly?
Am I over thinking this?

ZDan · 12-21-2021, 10:02 AM

I'd sooner trade for base model's (or other) 17s with 215/45-17. 215/45-18 is nearly an inch bigger in diameter vs. 215/40-18, that's a lot...
Another option would be 225/40-18s on the 18" wheels.

Varelco · 12-21-2021, 10:15 AM

I think you need to try it first. You might be surprised. I wouldn't increase the rolling radius by fitting 45 profile tyres on the 18s. If you want better ride quality and potentially a bit more resilience to less than perfect roads you're best off dropping to some lightweight 17s.

StE92ve · 12-21-2021, 01:01 PM

Quote:

Originally Posted by Varelco

I think you need to try it first. You might be surprised.

This is what I'm hoping for!

12-21-2021, 08:55 AM	#1
StE92ve Senior Member Join Date: Jun 2020 Drives: 2014 Mazda CX-5 Location: Long Island, NY Posts: 355 Thanks: 720 Thanked 331 Times in 169 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Alternate 18" Tire Size I'm planning on a GR86 Premium with the 18" wheels. My only issue is the 215/40 tires. Our roads on Long Island are less than spectacular and I'm concerned the 40 series will get chewed up and give a most unpleasant ride. I'm thinking of removing the 40's right after delivery and selling them and going to a 215/45 with either Contis or Michelin Ultra High Performance A/S. Is there a fitment issue with wheel well clearance? Will the dynamics of the car suffer greatly? Am I over thinking this?

12-21-2021, 10:02 AM	#2
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,584 Thanks: 1,377 Thanked 3,891 Times in 2,032 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	I'd sooner trade for base model's (or other) 17s with 215/45-17. 215/45-18 is nearly an inch bigger in diameter vs. 215/40-18, that's a lot... Another option would be 225/40-18s on the 18" wheels. Last edited by ZDan; 12-21-2021 at 10:29 AM.

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12-21-2021, 10:15 AM	#3
Varelco Senior Member Join Date: May 2015 Drives: '15 GT86 & '22 GR86 Location: Kent, UK Posts: 146 Thanks: 37 Thanked 112 Times in 51 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I think you need to try it first. You might be surprised. I wouldn't increase the rolling radius by fitting 45 profile tyres on the 18s. If you want better ride quality and potentially a bit more resilience to less than perfect roads you're best off dropping to some lightweight 17s.

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