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Old 11-04-2019, 12:47 PM
Join Date: Jul 2018
Location: New York
Posts: 57
MW3Designs is on a distinguished road
Winter Setup 255/55/18 to 235/55/18

My winter setup tires Blizzak 255/55/18 have no life left, and I have a set of 235/55/18 Blizzaks from another car that are in great shape. I was just curious if anyone might have ran this size on the X5 and if there were any issues? I nw that there will be a .9% difference in the speedo, 30mph to 30.92mph which isn't a big deal to me. I'm just worried about the way they will look in the wheel well, and handling with the slightly more narrow tires. Still have to check on my winter rims, as I do not remember the width.
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Old 11-04-2019, 01:06 PM
Join Date: Dec 2014
Location: New England
Posts: 688
josiahg52 is on a distinguished road
I'd ensure that the load and speed rating is appropriate for the X5. Second, I'd ensure that the new tires can be installed safely on the wheel that you'll be using, that is, 255 to 235 may have different wheel width requirements. Other than that, I have no advice.
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
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Old 11-04-2019, 01:17 PM
Join Date: Jan 2019
Location: New Jersey, USA
Posts: 160
spyro235 is on a distinguished road
What are those tire/ wheels off of? Check their weight loading, especially if you do any hauling. Know that 20mm less rubber on the ground DOES make a difference, especially when it comes to a 5000lbs SUV trying to corner or haul to an emergency stop. It'll cut through snow ever so slightly better, but probably not enough that you'd ever notice. your slush handling would likely improve marginally also, but your road handling could be fairly significantly reduced.

Personally, I wouldn't run 235's on my X5. Mine came with 255's, and that's the thinnest factory spec tire. I'm not saying that there would guaranteed have any issue, but having even less rubber on the ground to stop this thing wouldn't make me feel great.
'10 X5 35d- 252k mi, deleted and DUDMD stage 2, daily and tow vehicle
'01 330i- Drift car: SLR Super angle, BC coils- keep it simple
'07 335i 6mt - Sold @ 171k miles- stage 2 daily commuter for 2 years
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Old 11-04-2019, 04:08 PM
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Join Date: Nov 2011
Location: San Francisco CA
Posts: 184
SF2000x5 is on a distinguished road
They’ll be fine.

I run 235/60/18 blizzaks. They just feel a lot softer than 20” tires so handing will be compromises so I just take turns slower. Also, I have a spare in the trunk when I run the winters.
e70 - purchased 6/2018
e36 - wouldn't pass smog at 190k 2016
e53 - transmission blew at 225k 2012
e30 - sold as it was a little slow for a DD and burning oil at 220k 2011
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