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E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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Old 02-09-2020, 01:55 PM
habbyguy habbyguy is offline
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Tire width advice

Hi all... Just picked up a 2006 530xi with some seriously wide (and nice) wheels.


The stance and look of the front tires/wheels is fine, but the staggered (wider) rims on the back end up making the 265/35/19 tires like this:


How wide do you think I'm going to have to go to get it to look right (and hopefully give at least a tiny bit of curb protection)? The calcs say that a 285/35 or 295/35 should be close enough to the front tire circumference (245/40) to work (about +0.5% and +1.5%, respectively).

Any advice on aesthetics or fatal flaws with staggered wheels on an xi welcome...
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  #2  
Old 02-09-2020, 05:49 PM
dharmabmw dharmabmw is offline
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Aesthetics aside, what you need to think about is whether the wheels will allow the xdrive system to operate correctly. The system prefers a square setup. As well, handling is a factor of the offset, which is nominally -40.
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Old 02-09-2020, 07:37 PM
audiophool audiophool is offline
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X-drive only cares if the rolling diameter is very close. 0.5% would be fine. Tire width matters not one whit to the x-drive, but it does affect handling in that wider tires on the rear will tend to shift the handling to 'push' due to added traction on the rear which can be compensated using a stiffer rear sway bar (M5 rear bar is a direct fit). I've run 32mm wheels for years, sometimes with 10mm spacers on the front and 12 on the rear.

Last edited by audiophool; 02-09-2020 at 07:40 PM.
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Old 02-10-2020, 08:26 AM
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kd7iwp kd7iwp is offline
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Quote:
Originally Posted by audiophool View Post
X-drive only cares if the rolling diameter is very close. 0.5% would be fine. Tire width matters not one whit to the x-drive, but it does affect handling in that wider tires on the rear will tend to shift the handling to 'push' due to added traction on the rear which can be compensated using a stiffer rear sway bar (M5 rear bar is a direct fit). I've run 32mm wheels for years, sometimes with 10mm spacers on the front and 12 on the rear.
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Old 02-10-2020, 09:03 AM
habbyguy habbyguy is offline
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Thanks for the input. Gotta say, it's a breath of fresh air, just having come off online forums for Volvo (for my 2005 V50) and Audi (for my 2006 A3) where getting good (or usually, ANY) answers was not likely.

I agree that the circumference of the tires is what is going to matter to the x-drive system. I did the calcs, and the current discrepancy front to rear is 1.5%, which sounds like a lot to me.

Happily, by going from that 265-width tire to a 285-width tire, that drops to 0.5%.

And it's GOT to look better (and hopefully, give at least a LITTLE buffer against curb rash on those pretty wheels). ;-)
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Old 02-10-2020, 10:04 AM
SunglassesGuy SunglassesGuy is offline
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I've been interested in going wider, especially in back. cant get good traction with my current tires. I do know, not all 285's are created equal. some are wider than others. make sure to look at the details.
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Old 02-10-2020, 11:14 AM
habbyguy habbyguy is offline
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Quote:
Originally Posted by audiophool View Post
X-drive only cares if the rolling diameter is very close. 0.5% would be fine. Tire width matters not one whit to the x-drive, but it does affect handling in that wider tires on the rear will tend to shift the handling to 'push' due to added traction on the rear which can be compensated using a stiffer rear sway bar (M5 rear bar is a direct fit). I've run 32mm wheels for years, sometimes with 10mm spacers on the front and 12 on the rear.
Happily, when the previous owner bought these wheels, he (or the builder) did the calcs and figured out how to make 'em sit in the fenderwells right. This will be the first car I've owned in years that won't require spacers to get the wheels where they ought to be. I AM hoping that I don't end up with any rubbing on the inside of the tire against the liner, but if so I think there will be room to space the wheels out 5mm.

I'm not really too worried about a slight difference in the handling balance - this car is basically my road trip car and designated grocery-getter, and I won't be pushing it near the edges of that (big!) envelope very often (if ever). I've got a 330i ZHP in the garage for that kind of nonsense. ;-)

Now I'm grinding / sanding / painting the right rear before heading off to the tire shop. It's nice not having to worry about masking that old (worn out) tire! ;-)
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Old 02-10-2020, 07:50 PM
habbyguy habbyguy is offline
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Got the new shoes mounted. Went with 285 / 35 / 19 tires - looks a LOT better than the 265 section width tires on my (probably) 10.5" rims...


The fit of the tire on the rim is a LOT better, and should afford at least a little protection against light curb contact (instead of leading with the rim)….
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Old 02-10-2020, 08:14 PM
SunglassesGuy SunglassesGuy is offline
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x

they look great. does your back have small mud flaps built into wheel well inserts?
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Old 02-10-2020, 08:38 PM
habbyguy habbyguy is offline
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Nope - I think you're just looking at an odd reflection from the tire on the lower fender...
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Old 02-11-2020, 03:52 AM
pshovest pshovest is offline
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Looks real good. I would not have thought you can make a 285 tire work on an E60. What's the size and offset of the wheels?

Last edited by pshovest; 02-11-2020 at 09:08 AM.
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Old 02-11-2020, 04:41 AM
Kurt_ Kurt_ is offline
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One thing - with a staggered setup and the negative camber, you'll be unable to effectively rotate tires without removing the tires from the rims. You'll only be able to swap left to right which will do nothing.
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Old 02-11-2020, 08:04 AM
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Old 02-11-2020, 08:06 AM
habbyguy habbyguy is offline
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The rear tires are 285s - I'm not entirely sure that the 295s would fit, and in the end, I'm really happy with the look of the 285 tires anyway (and they're a LOT easier to find).

And yeah, I'll never be able to properly "rotate" those tires, but I don't think it will matter. My plan is to use these tires and wheels "locally", so I shouldn't be wearing them out any time soon. The car came with a set of silver five-spoke wheels with new all-season (square, not staggered) tires that I'll use for my long (7-8,000 mile) road trips. They're on 18" rims, so will ride smoother and quieter, which doesn't mean much on Arizona (smooth) roads, but will be VERY nice in the pothole-rich northeast.
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