BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > 18" track wheels for M135/140 for 265 rears
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      10-20-2016, 01:49 AM   #1
nelsonian101
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18" track wheels for M135/140 for 265 rears

I am looking for some 18" track wheels for my M140i.



The plan is to run 245 tyres on the front and 265 on the back.

Which wheels allow this to work?

Fronts I need 18 x 8-8.5" +40. (+35 may work depending on neg camber)
Rears I need 18 X 9-9.5" +50 (will +45 work?)

These Enkeis may fit below but what other options are available?

http://enkei.com/wp-content/uploads/2015/10/GTC01RR.pdf

http://enkei.com/wp-content/uploads/2015/01/rs05rr.pdf
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      10-20-2016, 03:42 AM   #2
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Nelson,

Enkei 8.5" wide ET35mm with 245/35/18 - will need a lot of negative camber to fit up front.

I ran M4 LCA and H&R sport springs [-2 deg negative camber and increased track by ~ 5-6mm each side] c/w oem 397 [8" wide et 34mm] with MPSS 225/40/18 and it was tight but OK - photos below







9" wide et50mm with 265/35/18 should be OK at the back.
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      10-20-2016, 04:11 AM   #3
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Why do you want wider rear tyres than front? My experience is that it causes understeer and excessive front tyre wear. The F20/F21 is better balanced with a square setup.
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      10-20-2016, 04:43 AM   #4
nelsonian101
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Car will eventually be running meth/water cooling with a lot of power.
Setting up for Time Attack style events in the future.

Below is my current car.
Daily driven sans aero.

You make a good point re 245 all round balance.
I won't really know until I play with spring rates/sway bars and determine understeer characteristics.
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Last edited by nelsonian101; 10-20-2016 at 04:51 AM..
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      10-20-2016, 05:27 AM   #5
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Quote:
Originally Posted by ovekvam
Why do you want wider rear tyres than front? My experience is that it causes understeer and excessive front tyre wear. The F20/F21 is better balanced with a square setup.
Agreed
I'd play around with compounds before going oversquare at the rear
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      10-21-2016, 05:06 AM   #6
nelsonian101
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Question remains, has anyone fitted 245 fronts and 265 rears on spare track wheels?
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      10-22-2016, 05:36 PM   #7
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Not my car but kw v1, Advan RZ 18x8 ET45 (with 5mm spacer) front and 18x9 ET50 rear with 245 & 265 tryes respectively
P1020037 by sootyvrs, on Flickr

P1010998 by sootyvrs, on Flickr

P1020051 by sootyvrs, on Flickr

P1020016 by sootyvrs, on Flickr

P1010990 by sootyvrs, on Flickr
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      10-23-2016, 03:12 AM   #8
nelsonian101
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Quote:
Originally Posted by Bee Pee View Post
Not my car but kw v1, Advan RZ 18x8 ET45 (with 5mm spacer) front and 18x9 ET50 rear with 245 & 265 tryes respectively
P1020037 by sootyvrs, on Flickr

P1010998 by sootyvrs, on Flickr

P1020051 by sootyvrs, on Flickr

P1020016 by sootyvrs, on Flickr

P1010990 by sootyvrs, on Flickr
Thanks for this mate.
Exactly what I was looking for.
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      02-02-2017, 09:35 PM   #9
nelsonian101
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Rears: 18 X 9-9.5" will +45 work with a 265 35 18 ?

Close?
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      11-07-2017, 05:21 PM   #10
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I've been speaking with APEX Wheels customer service asking about fitting a set of ARC-8s to my M140i.

They have said that you could probably fit 265/35 R18s on their 18x9.5J ET58 ARC-8 wheel but it might need a small spacer (3-5mm) to prevent rubbing.

They also offer an 18x9J ET42, but they didn't specifically mention what size tyre would be best for that wheel.

Maybe this helps? I've got my heart set on the ARC-8 design so I'm afraid I haven't done a huge amount of research into other offerings!
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      12-03-2019, 09:14 PM   #11
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Any update here? What did you go with? I am in dire need of more traction also
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      10-27-2021, 07:17 PM   #12
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Quote:
Originally Posted by nelsonian101 View Post
I am looking for some 18" track wheels for my M140i.



The plan is to run 245 tyres on the front and 265 on the back.

Which wheels allow this to work?

Fronts I need 18 x 8-8.5" +40. (+35 may work depending on neg camber)
Rears I need 18 X 9-9.5" +50 (will +45 work?)

These Enkeis may fit below but what other options are available?

http://enkei.com/wp-content/uploads/2015/10/GTC01RR.pdf

http://enkei.com/wp-content/uploads/2015/01/rs05rr.pdf
5 years old thread...I know. What did you end up going with?
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