[ashburyn54]

Hey guys, sorry for the tease. I'm going In at three to have this thing measured. What are some specs you guys would like to know.

I may even have a few test fitment pics you guys and gals before the day is over.

[Twix]

Exact clearance to the inner, outer and full lock front and rear of the front wheels. Take a measurement of the actual fender lip too. And then do the same for the rear minus the turn radius bit

[ashburyn54]

Originally Posted by Twix

Exact clearance to the inner, outer and full lock front and rear of the front wheels. Take a measurement of the actual fender lip too. And then do the same for the rear minus the turn radius bit

The measuring is done. The went through everything. Back to back with a gt4, what a looker. They are sending me an email with the exact specs. I don't have offsets yet and a large list of other things.

Some rough estimates so far

Conservative/big tire safe - 9.5"fr 10.5"rear

Aggressive-ish - 10"fr 11" rear

[Pyrat 2]

Would love to get strut to tire/wheel clearance. Plus inner fender to tire/wheel. I've use a string with a nut on the end held on the inner fender edge as a reference. Same measurements needed in the back.

[M3 Adjuster]

Originally Posted by ashburyn54

The measuring is done. The went through everything. Back to back with a gt4, what a looker. They are sending me an email with the exact specs. I don't have offsets yet and a large list of other things.

Some rough estimates so far

Conservative/big tire safe - 9.5"fr 10.5"rear

Aggressive-ish - 10"fr 11" rear

I highly recommend 10" square if possible.
You give up a little bit of tire width in the rear but your tires will be happier and your wallet will thank you

[Transfer]

265/35 front and 275/35 rear would be my ideal. Call me crazy if you want. So will it fit?

[ashburyn54]

Originally Posted by Transfer

265/35 front and 275/35 rear would be my ideal. Call me crazy if you want. So will it fit?

That will fit no problem. 275/35 up front and rear will probably be the track choice

[Fullofdays]

Originally Posted by M3 Adjuster

I highly recommend 10" square if possible.
You give up a little bit of tire width in the rear but your tires will be happier and your wallet will thank you

curious -- will a square setup change the balance? heard that a few of the performance driving school instructors recommended staggered

[Hossel19]

Originally Posted by Fullofdays

curious -- will a square setup change the balance? heard that a few of the performance driving school instructors recommended staggered

+1
Will a square set up prompt MDM to intervene more frequently during spirited driving or on the track?

[ashburyn54]

Originally Posted by Fullofdays

curious -- will a square setup change the balance? heard that a few of the performance driving school instructors recommended staggered

It will just dial out any understeer. Probably turn in understeer if anything with this chassis right?

The slight staggered setup is safer for BMW, the front axle will warn you before someone visits a ditch.

[clubsport]

Originally Posted by ashburyn54

Hey guys, sorry for the tease. I'm going In at three to have this thing measured. What are some specs you guys would like to know?

Forgeline Motorsport is carrying this out. I may even have a few test fitment pics you guys and gals before the day is over

Are you only looking into 19"? I would love to have numbers so I can work out a square 18x10 set.

[ashburyn54]

Originally Posted by clubsport

Are you only looking into 19"? I would love to have numbers so I can work out a square 18x10 set.

I'm only looking into 19's. Although the specs shouldn't change for 18's necessary. Small differences

[OrangeCrush]

Originally Posted by ashburyn54

That will fit no problem. 275/35 up front and rear will probably be the track choice

275/35 or 275/30? 35 seems pretty tall doesn't it? For 19" wheels?

[ashburyn54]

Originally Posted by OrangeCrush

275/35 or 275/30? 35 seems pretty tall doesn't it? For 19" wheels?

A 30 wouldn't be a bad choice especially on a wheel around a 9.5 or ten. A 30 sidewall is pretty small though. 275/30 would match nicely with the stock 245/35 diameter, still a bit shorter but close enough. I guess I had always planned on running the stock 265/35 up front with a 275 in the rear.

I'm not a fan of super small sidewalls anymore. As this will spend 99% of its life on the road. I don't think a 35 sidewall with a 265 is too much tire, for some reason 275/35 sounds worse to me. I think without proper camber adjustment and stiffer spring rates we would run into rubbing problems if dropped.

As always this is just speculation until I throw something on here.

[Fullofdays]

Originally Posted by clubsport

Are you only looking into 19"? I would love to have numbers so I can work out a square 18x10 set.

I'm looking at the same setup for track duty. Forgeline's website shows their monobloc for m3/m4 as 18 x 10

[ashburyn54]

Originally Posted by Fullofdays

I'm looking at the same setup for track duty. Forgeline's website shows their monobloc for m3/m4 as 18 x 10

Yep. That's the stock basic setup for great tire options. Pretty much setup to run a Pirelli World Challenge slick if your heart desires. I know turner did

[Fullofdays]

So what's the straight dope on offset and tyre fitment? I'm hearing that the M2 is a totally different animal from f30 M3's.


I'm wanting to run A7-R7's and getting wheel fitment before June jam at Road A is proving difficult.

[ashburyn54]

Originally Posted by Fullofdays

So what's the straight dope on offset? I'm hearing that the M2 is a totally different animal from f30 M3's.

Trying to get wheels and tires before June jam at Road A is proving difficult.

I have yet to order anything. From what I've seen a 9.5 at et28-32ish or 10 et33-37ish up front is spot on. Rears are looking like 10 et25 or 11 et37ish out back.

Higher numbers for larger tires and less camber. Lower is more aggressive.

[Franklin Joseph]

Originally Posted by ashburyn54

I have yet to order anything. From what I've seen a 9.5 at et28-32ish or 10 et33-37ish up front is spot on. Rears are looking like 10 et25 or 11 et37ish out back.

Higher numbers for larger tires and less camber. Lower is more aggressive.

So 18x10 et25 square with a 10-12mm spacer up front should do the trick?

[OrangeCrush]

Originally Posted by ashburyn54

I have yet to order anything. From what I've seen a 9.5 at et28-32ish or 10 et33-37ish up front is spot on. Rears are looking like 10 et25 or 11 et37ish out back.

Higher numbers for larger tires and less camber. Lower is more aggressive.

So you can run a 10" et 37 wheel up front without hitting the suspension? I wonder if the stock rears will fit up front.

[ashburyn54]

Originally Posted by OrangeCrush

So you can run a 10" et 37 wheel up front without hitting the suspension? I wonder if the stock rears will fit up front.

This is my only concern. I need to throw the tears on there and see what the clearance is. I was doing the math for fender clearance.

[ashburyn54]

Originally Posted by Franklin Joseph

So 18x10 et25 square with a 10-12mm spacer up front should do the trick?

No. That won't fit in the front. Higher offset means less aggressive. If you ran a 15mm spacer on a 18x10et25 that would be far too aggressive. It would be 18x10 et10. Unless you have about 10 degrees of negative camber and a 225/35 it wouldn't fit haha