Help me identify why my Z4 rubs, please.

[Meds]

Hey guys..
I'm starting the investigatons into why I get arch liner rub at the front.
Luckily it's not catching the arches. But enough to wear through the front arch liner where the wing and bumber meet.
It's driving me insane, and doing my nut in.. :rofl:

Koni Yellow, 1 turn from full soft.
Eibach Pro
Style 230 8Jx19 ET37
225/35/19



I do plan to move to an OEM wheel (for easthetics and comfort), this will result in a more conservative offset, giving me 10mm back.
This should fix it, right ?

In the meantime, this morning I've cranked another turn on the Koni's to see it it helps.

Any other thoughts?

 

[Ed Doe]

It's going to be a combination of height, damper stiffness and wheel spec (width and offset) - no one is going to really be able to tell you which one of those three it is in isolation, but likely you'll suffer far less rub if you revert to OE wheel specs, as yes wider wheels on a more aggressive offset will mean the tyre sits further out of the arch and therefore will be more likely to contact the arch liner on sharper turns where, and faster corners where the suspension is more compressed.

 

[Meds]

It's going to be a combination of height, damper stiffness and wheel spec (width and offset) - no one is going to really be able to tell you which one of those three it is in isolation, but likely you'll suffer far less rub if you revert to OE wheel specs, as yes wider wheels on a more aggressive offset will mean the tyre sits further out of the arch and therefore will be more likely to contact the arch liner on sharper turns where, and faster corners where the suspension is more compressed.

Yes I'm really hoping moving to an et47 front will help me here, I'd rather not swap out the Eibach springs if I can help it.
My only question is how do other folk get away with the et37 and Eibach Pro combination, I've read many other people are running this just fine.

 

[enuff_zed]

It's going to be a combination of height, damper stiffness and wheel spec (width and offset) - no one is going to really be able to tell you which one of those three it is in isolation, but likely you'll suffer far less rub if you revert to OE wheel specs, as yes wider wheels on a more aggressive offset will mean the tyre sits further out of the arch and therefore will be more likely to contact the arch liner on sharper turns where, and faster corners where the suspension is more compressed.

Yes I'm really hoping moving to an et47 front will help me here, I'd rather not swap out the Eibach springs if I can help it.

Unless you're addicted to the 19s, then it is 'possible' that an 18" with that 37 offset would clear? So you'd fill the arches width wise for looks.

 

[mr wilks]

It often sounds far worse than it is & when you are on the max for rub even a matter of mms can be the difference so if you want to retain the look & stance of the style 230 you could try 215 35 front tyre

 

[Meds]

Yes I'm really hoping moving to an et47 front will help me here, I'd rather not swap out the Eibach springs if I can help it.

Unless you're addicted to the 19s, then it is 'possible' that an 18" with that 37 offset would clear? So you'd fill the arches width wise for looks.

I deffo want to change them, They're not to my tastes (but I've had loads of compliments on them, so I'm in the minority)
I've thought about some 18's when the same offset and width, but I'd hate to try it and still have the issue.

 

[Meds]

It often sounds far worse than it is & when you are on the max for rub even a matter of mms can be the difference so if you want to retain the look & stance of the style 230 you could try 215 35 front tyre

The 230's are going as soon as I find some suitable 18's. (and I top up the Z4 piggy bank)

 

[Mr Tidy]

I ran my second E86 on a set of Style 295s from an E89 and didn't have any rubbing problems with them. They look pretty much the same as your 230s and I thought they looked great!

Fronts were 8J x 18, ET 29 with 225/35 tyres but it was on standard, and probably tired, OE Sport suspension.

I can't see you having any rubbing problems with an 18" ET47 wheel!

 

[Meds]

Ohh yes, an et47 will give me plenty of room to compensate for the Eibachs.

 

[Dubbedown]

Easy, it’s a combo of wheel offset and suspension settings. Either dial in some camber or raise the fronts.

 

[Meds]

Easy, it’s a combo of wheel offset and suspension settings. Either dial in some camber or raise the fronts.

Dialing in or raising means mechanical changes. I'd like to stay with the Eibachs and I dont have any camber plates.
I'll try et47 wheels first of all, that should solve it.
In the meantime I'll keep adding a few twists into the front Koni's to make it stiffer until I hit a 'happy' medium between harsh or rubbing.

I dont know how other guys are getting away with it. Eibachs and et37 are a struggle..

 

[Meds]

I noticed the camber pins were not present on mine, and the strut mount bolts were in the 'middle' of the grooves.
So I've knocked over the top of both struts by a few mm.
That may result in a huge 0.0005 mm increase in clearance. :rofl: