Results 1 to 11 of 11

Thread: What is the widest wheel and tire combo that can be fit on the FRONT?

  1. #1
    Join Date
    Jun 2012
    Location
    Woodstock, GA
    Posts
    566
    My Cars
    2001 BMW 540i6

    What is the widest wheel and tire combo that can be fit on the FRONT?

    I’m trying to run 275/35/18 squared. I have some of the discount tire M parallel replicas, which are 18x9.5 et25. Without a spacer that size rubs the strut so I test fit some 20mm ones off my E39 making the offset now a +5. At full left hand lock the tire rubs the front fender liner.

    I just want to hear what some of you are running, I’m thinking it may just be my old fender liners are a little saggy.

  2. #2
    Join Date
    Aug 2007
    Location
    San Ramon, CA
    Posts
    1,421
    My Cars
    850Ci, M5, Model-S P85D
    I'm running Michelin PS2, 265/40-17 with 9x17-ET-10mm rims with 12mm spacer no rubbing ever.

  3. #3
    Join Date
    Nov 2005
    Location
    Langley BC Canada
    Posts
    2,899
    My Cars
    91 850 Panzer
    245/40-18 with ET5, no spacer MK I's , no rubbing.
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  4. #4
    Join Date
    Jun 2012
    Location
    Woodstock, GA
    Posts
    566
    My Cars
    2001 BMW 540i6
    Hmm, even though I’m running a wider wheel and tire than both of you the dimensions as far as how far they poke out and what not are about the same. Maybe I should try and put some new wheel liners in and see if that fixes it.

    - - - Updated - - -

    Quote Originally Posted by m6bigdog View Post
    I'm running Michelin PS2, 265/40-17 with 9x17-ET-10mm rims with 12mm spacer no rubbing ever.
    So your end set up is a 9x17 Et -2

  5. #5
    Join Date
    Aug 2007
    Location
    San Ramon, CA
    Posts
    1,421
    My Cars
    850Ci, M5, Model-S P85D
    Quote Originally Posted by killian665 View Post
    Hmm, even though I’m running a wider wheel and tire than both of you the dimensions as far as how far they poke out and what not are about the same. Maybe I should try and put some new wheel liners in and see if that fixes it.

    - - - Updated - - -

    So your end set up is a 9x17 Et -2
    My setup with 9x17" ET is actually 9mm (mistakes in my original reply, explained below)

    I think the ET:5mm you are using is the best you can do with 275 section width tire and maintain a reasonable sidewall to strut tube clearance (3-5mm).
    Here's the rub, pun intended.
    Adding 10mm to the tire section width adds 10mm to the tire tread outside arc path when the tire to strut tube distance is at the limit.

    Excuse my difficult to interpret notation ET-10mm should have been ET:10mm

    You made me look at my tire/rim Excel offset calculator.
    AND
    Mistake alert.
    The 9x17" rims I'm running are ET:19mm (not ET:10mm) and I used a 10mm spacer so the ET is 9mm.
    IMHO, I have the ET as small as it can be to maintain a safe clearance of 3-5mm between the tire sidewall and strut tube.

    Also, when I do the analysis for 275 section width tire I get an ET:4mm

  6. #6
    Join Date
    Jun 2012
    Location
    Woodstock, GA
    Posts
    566
    My Cars
    2001 BMW 540i6
    It’s not the strut tube that’s an issue it’s at full lock, the outside edge of the tread rubs the front of my fender liners. So rolling down the road if I took a full lock turn it would chew through the liners pretty quickly.

  7. #7
    Join Date
    Aug 2007
    Location
    San Ramon, CA
    Posts
    1,421
    My Cars
    850Ci, M5, Model-S P85D
    Quote Originally Posted by killian665 View Post
    It’s not the strut tube that’s an issue it’s at full lock, the outside edge of the tread rubs the front of my fender liners. So rolling down the road if I took a full lock turn it would chew through the liners pretty quickly.
    I think you misunderstood my explanation.
    While your tire may not be rubbing the strut tube with a ET:5; if it wasn't in the way (I like to keep minimum 5mm clearance) you could run a +15 or 20 ET and the tire wouldn't rub against the fender liner at full steering lock.
    As I indicated, my calculations indicate you may be able to run a minimum ET:4 but not much more or the tire will be too close to or rub the strut tube. Also, depending on the tire manufacture and series the actual tire section width could be greater or less than the nominal section width of 275 I used to calculate the ET, so you will want to measure the actual section width and the actual strut tube to tire side wall clearance once the wheel is mounted.
    Therefore, as I indicated once you get the tire wide enough you get to an unacceptable option, rub the strut tube or rub the finder liner when the steering is at full lock and you may be there.

  8. #8
    Join Date
    Sep 2010
    Location
    Finland
    Posts
    202
    My Cars
    bmw 850i M-tech
    With et5, 265/35 might fit without rubbing but that also depends the tyre manufacturer. Keep in mind that 275/35 you are using is also a bit taller (7mm actually) than 265/35. So, with 265/35/18 you should have about 6-8mm more clearence with full lock, in theory, rest is up to tyre brand.

    Mk1 is also 9,5x18" et5 and with 245/40 hankook ventus S1evo2 tyre it has about 10mm clearence to fender liner at full lock.
    Last edited by mikae31; 11-09-2018 at 10:28 AM.

  9. #9
    Join Date
    Jun 2012
    Location
    Woodstock, GA
    Posts
    566
    My Cars
    2001 BMW 540i6
    I guess I’ve just got too big a tire under it.

  10. #10
    Join Date
    May 2007
    Location
    Tampa, FL
    Posts
    1,179
    My Cars
    '93 850Ci, '07 X5 4.8
    Would this tool help?

    http://www.bmwccae31.com/DOCS/Info/W...Calculator.xls

    Its a wheel fitment calculator based on an Excel spread sheet.

    -Bob

  11. #11
    Join Date
    Aug 2007
    Location
    San Ramon, CA
    Posts
    1,421
    My Cars
    850Ci, M5, Model-S P85D
    Quote Originally Posted by Chillax View Post
    Would this tool help?

    http://www.bmwccae31.com/DOCS/Info/W...Calculator.xls

    Its a wheel fitment calculator based on an Excel spread sheet.

    -Bob
    Not exactly.
    While this type of application can compare the original and proposed wheel/tire offset and oversize dimensions it will not define the actual tire clearance at the strut tube, wheel arch and fender liner.

Similar Threads

  1. Widest wheel and tire combo on an E 36 M3-4...Search done.....
    By Yasir in forum Tire & Wheel Forum sponsored by The Tire Rack
    Replies: 2
    Last Post: 11-12-2013, 07:28 PM
  2. OK, final question, how will this wheel and tire combo work?
    By DMVV in forum Tire & Wheel Forum sponsored by The Tire Rack
    Replies: 5
    Last Post: 04-13-2006, 03:18 PM
  3. WTB: Wheel and tire combo to fit 96 328i.
    By Kompressor in forum Wheels and Tires
    Replies: 2
    Last Post: 12-28-2005, 07:03 PM
  4. FS 318is wheel&winter tire combo
    By neil326 in forum Wheels and Tires
    Replies: 6
    Last Post: 01-09-2004, 05:44 PM
  5. FS: BMW OEM 16" wheel and tire combo E39 5 Series
    By pyoon in forum Wheels and Tires
    Replies: 0
    Last Post: 10-22-2003, 07:12 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •