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M2 Technical Topics > Wheels / Tires -- Sponsored by The Tire Rack > BBS FI-R Tire sizes

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      01-10-2020, 01:16 AM   #1
Todd
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BBS FI-R Tire sizes

What are recommended tire sizes for 19" FI-R's on a M2 Comp ? Car will be lowered with H&R or Eibach springs. Wondering if 255/275's will rub or not. Any input is appreciated.
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      01-11-2020, 07:04 AM   #2
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I have that setup on my M2C on a set of Forgeline wheels (same specs as FI-R), lowered ~1/2” on Nitron coilovers and it works just fine. I don’t know how much the Eibach setup lowers it, but I have tons of clearance with my alignment setup (-3 front, -2 rear).
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      01-11-2020, 07:43 AM   #3
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Quote:
Originally Posted by QuickOne View Post
I have that setup on my M2C on a set of Forgeline wheels (same specs as FI-R), lowered ~1/2” on Nitron coilovers and it works just fine. I don’t know how much the Eibach setup lowers it, but I have tons of clearance with my alignment setup (-3 front, -2 rear).
That's a hell of a lot of front camber, no? Double the stock 1.5° I think.

And that's the problem with the FI-R...the offset isn't optimal, causing rubbing when adding the proper sized tires for the wheel when lowered.
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      01-12-2020, 02:36 PM   #4
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That's my only concern in going with FI-R's on the M2, is the aggressive offsets that somewhat limit wider tires. The setups I have seen, most are running stock tire sizes in the FI-R's to avoid rubbing.




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Originally Posted by VisualEcho View Post
That's a hell of a lot of front camber, no? Double the stock 1.5° I think.

And that's the problem with the FI-R...the offset isn't optimal, causing rubbing when adding the proper sized tires for the wheel when lowered.
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      01-28-2020, 09:08 AM   #5
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Quote:
Originally Posted by VisualEcho View Post
That's a hell of a lot of front camber, no? Double the stock 1.5° I think.

And that's the problem with the FI-R...the offset isn't optimal, causing rubbing when adding the proper sized tires for the wheel when lowered.
It’s a fair amount of camber for a track car. Mine isn’t driven daily.

Have to also keep in mind that you need enough offset to keep the clearance for the front coilovers.

Supposedly CMS ran this same offset with a 295/265 setup.
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      01-28-2020, 01:10 PM   #6
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I'm running 255/275 on my 19" FI-Rs, as well.
There aren't any issues with camber -2.5°f and -1.5°r.
Up to now, I had Michelin PSS & PSC2 but also Contis SC6.
Car is lowered on KW CS 3-way.
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      01-29-2020, 09:00 AM   #7
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Quote:
Originally Posted by Andi-M2 View Post
I'm running 255/275 on my 19" FI-Rs, as well.
There aren't any issues with camber -2.5°f and -1.5°r.
Up to now, I had Michelin PSS & PSC2 but also Contis SC6.
Car is lowered on KW CS 3-way.
Hey Andi, how did you like the conti's
have read the contact 6 is a great tyre but would like to know your feedback as you have tried them all
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      02-01-2020, 01:11 PM   #8
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The Conti SC6 is similar to the new Michelin PS4S.
The wet performance is ways better than the Michelin PSS with an - at least - identical performance in dry conditions.
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      02-01-2020, 02:18 PM   #9
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Originally Posted by Andi-M2 View Post
The Conti SC6 is similar to the new Michelin PS4S.
The wet performance is ways better than the Michelin PSS with an - at least - identical performance in dry conditions.
Initial performance.

My issue with Conti has always been when they start to wear, that's when you separate the men from the boys.

How many miles do you have on yours?
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