08-07-2023, 02:02 AM | #1 |
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Rubbing after coilovers, spacers, wider tires- Need advice!
Well not surprisingly, I have some rubbing issues with my current setup:
KWV3's dropped to 595, 600mm, 10mm spacers all around, Michelin PS4S's in 255/35/19, 275/35/19 I've already fixed the inner fender liners for full lock turns, as well as some other plastic protrusions in the inner liner, but I still have some rubbing on the fender-bumper connection tab Front AND Rear. They happen on small bumps 30+mph and on dips on freeways 70+mph, and I am starting to get worried since it is rubbing on the tire sidewall, especially since I look to take it to a track day or autocross this year. I've tried 5mm spacers instead- it lessened the problem, but still rubbed on harsh dips. I know the PS4S's tire edge is more square, and of course wider tires don't help, but what are other possible solutions? Thought about camber plates (Currently -1.6 F -1.9R) will an additional 0.5~1 degree increase in negative camber fix this even? Also would like to minimize NVH as this is a daily. Do people still sand down this fender-bumper tab? Is it OK for the F87? (The tab doesn't seem as prominent as older BMW's) Need your advice!!
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08-07-2023, 07:16 AM | #2 |
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If worried about NVH, you could consider camber correction hub carriers as an OEM option to add ca 0.5 extra neg camber.
Any rubbing w/o spacers on front axles ?
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08-07-2023, 08:22 AM | #3 | |
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Secondly, you are not really at BMW's 595/600 ride height spec because your tires are taller than the tires BMW recommend for that height. They measure from the bottom of the wheel rim to the top of the wheel arch, which means your taller tires have necessarily less clearance (2.5mm front, 3.5mm rear) It's not a lot, but all the little millimeters add up. Lastly, check which EXACT tires are you running. In those sizes the PS4S comes in 3 different versions...all with different tread widths (see chart), and this will absolutely make the difference in rubbing. |
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08-07-2023, 10:52 PM | #4 | |
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I haven't tried removing all spacers- probably will get the job done but looking for alternatives.
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08-07-2023, 11:10 PM | #5 | |
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I guess easiest way would be to remove the spacers, but they just look so good! Any alternatives??
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08-08-2023, 07:17 AM | #6 | |
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