Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Unbearable Arch Rub!

Discuss problems you have had or are having with your Z4
User avatar
Buckz
Senior Member
Senior Member
Posts: 1112
Joined: Mon Dec 05, 2016 11:00 am
Location: West sussex

Unbearable Arch Rub!

Post by Buckz » Thu Feb 09, 2017 9:57 pm

idej_jedi wrote:
Buckz wrote:What wheels have you got?
Riva DTMs
so 19x8 et34..

weird that you get rub!

I'm running 19x8.5 et38 with 235 rubber and I've got no issues.

I'd sell your set tbh and get a set of cmwheels csls.

http://www.cmwheels.com/index.php?route ... ct_id=1247
Image

User avatar
mr wilks
Legend
Legend
Posts: 21897
Joined: Wed Jul 04, 2012 10:02 pm
Location: Lancashire

Unbearable Arch Rub!

Post by mr wilks » Thu Feb 09, 2017 10:00 pm

idej_jedi wrote:
jamie_z4 wrote:You won't fix it with spacers mate it will make the problem even worse It will make the wheels more prominent which will rub the Arches more. Only resolution is wheels with a higher offset or raising suspension
Gutting! The article that I just read said that if the offset was too high it could be fixed with spacers. :(
Simply put Dan if your offset was 50 you could make it lower by adding a spacer so for example adding 15mm spacer would make your et or offset 35
Now if your offset is already 35 & you added a 5mm spacer it would make it 30 , , & the basic rule is the lower the number the further from the hub sits the wheel face so therefore a higher offset number can be made lower but a lower cannot be made higher ( or at least not without serious machining facilities :thumbsup:)
3 ZMRs
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 10:04 pm

mr wilks wrote:
idej_jedi wrote:
jamie_z4 wrote:You won't fix it with spacers mate it will make the problem even worse It will make the wheels more prominent which will rub the Arches more. Only resolution is wheels with a higher offset or raising suspension
Gutting! The article that I just read said that if the offset was too high it could be fixed with spacers. :(
Simply put Dan if your offset was 50 you could make it lower by adding a spacer so for example adding 15mm spacer would make your et or offset 35
Now if your offset is already 35 & you added a 5mm spacer it would make it 30 , , & the basic rule is the lower the number the further from the hub sits the wheel face so therefore a higher offset number can be made lower but a lower cannot be made higher ( or at least not without serious machining facilities :thumbsup:)
Back to the standard suspension then... :(

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 10:11 pm

Buckz wrote:
idej_jedi wrote:
Buckz wrote:What wheels have you got?
Riva DTMs
so 19x8 et34..

weird that you get rub!

I'm running 19x8.5 et38 with 235 rubber and I've got no issues.

I'd sell your set tbh and get a set of cmwheels csls.

http://www.cmwheels.com/index.php?route ... ct_id=1247
That's a huge undertaking, as in, getting news ones, refurbishing the existing ones, selling the olds etc etc. Probably a job for summer. ;)

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 10:12 pm

Ducklakeview wrote:Just a point..

You haven't got staggered wheels have you, ie different offsets front and rear? If so, is it possible you have a rear wheel on the front, or vice versa??

Mike
The rears are concave so unlikely.

Dav the wheel nut
Lifer
Lifer
Posts: 3066
Joined: Sun Mar 07, 2010 3:40 pm
Location: Somerset

Unbearable Arch Rub!

Post by Dav the wheel nut » Thu Feb 09, 2017 10:34 pm

Where exactly is the tyre catching? Is it definitely only on one side? I don't think there should be an issue with the wheel size and offset you have given.

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 10:36 pm

Dav the wheel nut wrote:Where exactly is the tyre catching? Is it definitely only on one side? I don't think there should be an issue with the wheel size and offset you have given.
It's just at the top front of the drivers side arch. My car sits slightly lower at that side, but when I went for my wheel alignment the guy told me all BMWs sit slightly lower to the drivers side. TBH though when the Mrs is in the car it also catches on the passenger side.

Dav the wheel nut
Lifer
Lifer
Posts: 3066
Joined: Sun Mar 07, 2010 3:40 pm
Location: Somerset

Unbearable Arch Rub!

Post by Dav the wheel nut » Thu Feb 09, 2017 10:48 pm

What is your tyre profile? 235/35/19 or 235/40/19?

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 10:55 pm

Dav the wheel nut wrote:What is your tyre profile? 235/35/19 or 235/40/19?
235/35/19 - I think I'll try some 225s and see if that helps.

Dav the wheel nut
Lifer
Lifer
Posts: 3066
Joined: Sun Mar 07, 2010 3:40 pm
Location: Somerset

Unbearable Arch Rub!

Post by Dav the wheel nut » Thu Feb 09, 2017 11:04 pm

All things considered it would seem your only option would be to try a thinner tyre, 225/35/19.
It still seems a little odd to me :?
Out of interest when you measure the distance from the top of the arch to the ground when the vehicle is unoccupied how much lower is the drivers side compared to the passenger if at all?

User avatar
mr wilks
Legend
Legend
Posts: 21897
Joined: Wed Jul 04, 2012 10:02 pm
Location: Lancashire

Unbearable Arch Rub!

Post by mr wilks » Thu Feb 09, 2017 11:07 pm

idej_jedi wrote:
Dav the wheel nut wrote:What is your tyre profile? 235/35/19 or 235/40/19?
235/35/19 - I think I'll try some 225s and see if that helps.
Just re read the whole thread & penny dropped ! You are running a 235 on 8j rim :? when others are generally on 8.5j so that would stretch the 235 or 225
On a 8j front you can easily go to 215 35 & i'm pretty sure that will cure it
3 ZMRs
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 11:09 pm

mr wilks wrote:
idej_jedi wrote:
Dav the wheel nut wrote:What is your tyre profile? 235/35/19 or 235/40/19?
235/35/19 - I think I'll try some 225s and see if that helps.
Just re read the whole thread & penny dropped ! You are running a 235 on 8j rim :? when others are generally on 8.5j so that would stretch the 235 or 225
On a 8j front you can easily go to 215 35 & i'm pretty sure that will cure it
Thanks Andy! Appreciate you taking the time to read through it all. :)

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 11:10 pm

Dav the wheel nut wrote:All things considered it would seem your only option would be to try a thinner tyre, 225/35/19.
It still seems a little odd to me :?
Out of interest when you measure the distance from the top of the arch to the ground when the vehicle is unoccupied how much lower is the drivers side compared to the passenger if at all?
I'll check in the morning. ;)

User avatar
Buckz
Senior Member
Senior Member
Posts: 1112
Joined: Mon Dec 05, 2016 11:00 am
Location: West sussex

Unbearable Arch Rub!

Post by Buckz » Thu Feb 09, 2017 11:12 pm

mr wilks wrote:
idej_jedi wrote:
Dav the wheel nut wrote:What is your tyre profile? 235/35/19 or 235/40/19?
235/35/19 - I think I'll try some 225s and see if that helps.
Just re read the whole thread & penny dropped ! You are running a 235 on 8j rim :? when others are generally on 8.5j so that would stretch the 235 or 225
On a 8j front you can easily go to 215 35 & i'm pretty sure that will cure it
agreed 215 would be bang on with a little bit of stretch.
Image

idej_z4
Senior Member
Senior Member
Posts: 1705
Joined: Thu Apr 07, 2016 3:40 pm

Unbearable Arch Rub!

Post by idej_z4 » Thu Feb 09, 2017 11:19 pm

Buckz wrote:
mr wilks wrote:
idej_jedi wrote:
235/35/19 - I think I'll try some 225s and see if that helps.
Just re read the whole thread & penny dropped ! You are running a 235 on 8j rim :? when others are generally on 8.5j so that would stretch the 235 or 225
On a 8j front you can easily go to 215 35 & i'm pretty sure that will cure it
agreed 215 would be bang on with a little bit of stretch.
Thanks dude! New rubber it is! :)

Post Reply