Tire question

JIMX681 · 11-11-2021, 09:43 PM

I'm looking at getting a set of wheels. I was sure I was going to lower it with MSS but after hearing about so many people having issues I decided against it. Don't want to go H&R and sacrifice ride quality. Instead I am going with a higher profile tire to fill the wheel gap some. I had trouble finding the exact tires sizes I wanted but found Michelin PS4S in this set up:

Front
22x10.5
285/40/22

Rear
22x12
325/35/22

It puts the overall diameter of all 4 at 30.9".
Has anyone tried going with bigger sidewalls?
Any feedback or negatives anyone has experienced?

HZX540e · 11-11-2021, 10:56 PM

If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.

JIMX681 · 11-11-2021, 11:12 PM

Quote:

Originally Posted by HZX540e

If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.

Not helpful whatsoever, but thanks for the input.

nZtiZia · 11-11-2021, 11:39 PM

when you're changing tire sizes from OEM, it's recommended the new tires be within 3% of the height and diameter of your original tires. going beyond that puts serious risk of premature AWD drivetrain failure.

it's more than simply "will it fit?" it's "will it be safe and function properly?" it's best practice to mount OEM approved sizes for your particular vehicle.

that being said, I remotely recall a couple guys who installed larger than OEM sidewalls claiming no issues.

Chas8283 · 11-12-2021, 05:42 AM

Turbobusa changed tire size. Look for his thread a few below yours on “how to get a smoother ride.”

JIMX681 · 11-12-2021, 06:23 AM

Quote:

Originally Posted by nZtiZia

when you're changing tire sizes from OEM, it's recommended the new tires be within 3% of the height and diameter of your original tires. going beyond that puts serious risk of premature AWD drivetrain failure.

it's more than simply "will it fit?" it's "will it be safe and function properly?" it's best practice to mount OEM approved sizes for your particular vehicle.

that being said, I remotely recall a couple guys who installed larger than OEM sidewalls claiming no issues.

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

HZX540e · 11-12-2021, 07:55 AM

Quote:

Originally Posted by JIMX681

Quote:

Originally Posted by HZX540e

If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.

Not helpful whatsoever, but thanks for the input.

Sorry

Poleposition · 11-12-2021, 07:58 AM

Larger sidewalls on the same rims will give a very different look to the whole vehicle. Can you get tires to fit? Yes. Should you? Maybe not. Its just a few millimeters we're talking about but it makes a world of difference. I dont think you'll be happy with the look and the ride wont improve all that much. I installed the H&R's and have zero regrets. Between the H&R's and the spacers, the truck now looks soooo aggressive and beefy. Ride quality certainly did not suffer. I would hear about it everyday if it did as it is my wifes daily. I strongly recommend against the increased sidewalls. i think youll regret it.

nZtiZia · 11-12-2021, 08:14 AM

Quote:

Originally Posted by JIMX681

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

correct. within 1% difference between front and rear, but 3% overall difference from OEM to non-OEM tire size, which you're also within range

silverstar335 · 03-13-2022, 11:27 PM

Quote:

Originally Posted by nZtiZia

Quote:

Originally Posted by JIMX681

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

correct. within 1% difference between front and rear, but 3% overall difference from OEM to non-OEM tire size, which you're also within range

Do we know for a fact that it needs to be up to 3% overall difference. I am considering 285/40/22 and 325/35/22 which have a 0.1% difference front to back but 4% overall in comparison to OEM.

nZtiZia · 03-14-2022, 04:52 AM

Quote:

Originally Posted by silverstar335

Quote:

Originally Posted by nZtiZia

Quote:

Originally Posted by JIMX681

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

correct. within 1% difference between front and rear, but 3% overall difference from OEM to non-OEM tire size, which you're also within range

Do we know for a fact that it needs to be up to 3% overall difference. I am considering 285/40/22 and 325/35/22 which have a 0.1% difference front to back but 4% overall in comparison to OEM.

any difference compared to OEM will mainly throw off your speedometer (the larger the difference, the larger the discrepancy), but at 4% you may also experience suspension and/or wheel well clearance issues

robertg · 03-14-2022, 05:41 AM

So what is the optimal tire/rim size for a square winter setup that falls within factory specs for not messing up AWD/transfer case?

bellabimmer · 03-14-2022, 06:18 AM

Quote:

Originally Posted by robertg

So what is the optimal tire/rim size for a square winter setup that falls within factory specs for not messing up AWD/transfer case?

295/35/21 both front and back.

mjr24 · 03-14-2022, 04:39 PM

Quote:

Originally Posted by HZX540e

If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.

Then no one would ever change sizes width or sidewall. Yes, as long as you keep within the normal specs of front to rear you can do this.

OP, I thought about doing this but in the stock 21/22 sizes they are still really no tires available at the size above (35 and 40 sidewall instead of 30 and 35), either.

The amount of gap on these cars is stupid.....there is no reason for it and it takes away from the look. That and the quiet exhaust are the 2 things I hate the most about the X5M....I honestly which I had gone M50i at this point.

mjr24 · 03-14-2022, 04:40 PM

Quote:

Originally Posted by nZtiZia

any difference compared to OEM will mainly throw off your speedometer (the larger the difference, the larger the discrepancy), but at 4% you may also experience suspension and/or wheel well clearance issues

No, it won't throw off your speedometer. Remember, people say BMW actually overestimates your speed by 3-4% on the speedo from the factory.

JIMX681 · 03-14-2022, 08:23 PM

Quote:

Originally Posted by silverstar335

Quote:

Originally Posted by nZtiZia

Quote:

Originally Posted by JIMX681

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

correct. within 1% difference between front and rear, but 3% overall difference from OEM to non-OEM tire size, which you're also within range

Do we know for a fact that it needs to be up to 3% overall difference. I am considering 285/40/22 and 325/35/22 which have a 0.1% difference front to back but 4% overall in comparison to OEM.

I ordered a set of Vossen wheels and tried a 285/40/22 tire and it rubbed too much. I'm testing out a 275/40/22 tomorrow to see if has the clearance it needs.

silverstar335 · 03-14-2022, 10:16 PM

Quote:

Originally Posted by JIMX681

Quote:

Originally Posted by silverstar335

Quote:

Originally Posted by nZtiZia

Quote:

Originally Posted by JIMX681

From what I understand to avoid issues with the xDrive system and transfer case the front and the rear diameter need to be within 1% of each other. The stock wheels are 29.1" and 29.4".This setup would put them at 30.98" and 30.96". So it's actually a closer match than the factory setup.

correct. within 1% difference between front and rear, but 3% overall difference from OEM to non-OEM tire size, which you're also within range

Do we know for a fact that it needs to be up to 3% overall difference. I am considering 285/40/22 and 325/35/22 which have a 0.1% difference front to back but 4% overall in comparison to OEM.

I ordered a set of Vossen wheels and tried a 285/40/22 tire and it rubbed too much. I'm testing out a 275/40/22 tomorrow to see if has the clearance it needs.

What is the wheel width and offset? Are you lowered?

nZtiZia · 03-15-2022, 04:59 AM

Quote:

Originally Posted by mjr24

No, it won't throw off your speedometer. Remember, people say BMW actually overestimates your speed by 3-4% on the speedo from the factory.

of course it will. regardless of an overestimated speedometer or not, you have a starting point and once the rolling circumference changes, there's a delta produced. (OEM 275/45R20 versus non OEM 285/40R22 shown below)

JIMX681 · 03-15-2022, 11:22 AM

Quote:

Originally Posted by nZtiZia

Quote:

Originally Posted by mjr24

No, it won't throw off your speedometer. Remember, people say BMW actually overestimates your speed by 3-4% on the speedo from the factory.

of course it will. regardless of an overestimated speedometer or not, you have a starting point and once the rolling circumference changes, there's a delta produced. (OEM 275/45R20 versus non OEM 285/40R22 shown below)

Factory tire size was 295/35/21 and I just test fit a 275/40/22 and it fit without rubbing.
It's a 10.5" wheel. Not lowered

jo2134 · 03-15-2022, 07:02 PM

Quote:

Originally Posted by mjr24

Quote:

Originally Posted by HZX540e

If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.

Then no one would ever change sizes width or sidewall. Yes, as long as you keep within the normal specs of front to rear you can do this.

OP, I thought about doing this but in the stock 21/22 sizes they are still really no tires available at the size above (35 and 40 sidewall instead of 30 and 35), either.

The amount of gap on these cars is stupid.....there is no reason for it and it takes away from the look. That and the quiet exhaust are the 2 things I hate the most about the X5M....I honestly which I had gone M50i at this point.

You would change your mind very fast after going to it for a couple weeks

just drove a friends after having my F95 for almost 2 months and its really night and day although the M50i just wins no matter what when it comes to comfort. While the F95 exhaust really isn't monstrous the M50i exhaust note disappoints as well

JIMX681 · 03-31-2022, 07:23 PM

Went with 275/40/22 and 325/35/22 Michelin PS4S.

JIMX681 · 04-01-2022, 07:32 PM

Don't try to go any wider on the front. 275/40/22 was perfect. Hopefully a 335/35/22 will be made.

11-11-2021, 09:43 PM	#1
JIMX681 Private First Class 120 Rep 193 Posts Drives: 2022 X5M Comp Join Date: Jan 2010 Location: Baltimore iTrader: (0)	I'm looking at getting a set of wheels. I was sure I was going to lower it with MSS but after hearing about so many people having issues I decided against it. Don't want to go H&R and sacrifice ride quality. Instead I am going with a higher profile tire to fill the wheel gap some. I had trouble finding the exact tires sizes I wanted but found Michelin PS4S in this set up: Front 22x10.5 285/40/22 Rear 22x12 325/35/22 It puts the overall diameter of all 4 at 30.9". Has anyone tried going with bigger sidewalls? Any feedback or negatives anyone has experienced?
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11-11-2021, 10:56 PM	#2
HZX540e Lieutenant 374 Rep 591 Posts Drives: 2021 X5MC Join Date: Oct 2016 Location: Fairfax, VA iTrader: (0)	If it's not broken don't fix it. German engineers know what they're doing. The height is not an error, changing things will have consequences. That my opinion.
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11-11-2021, 11:39 PM	#4
nZtiZia Major General 4655 Rep 8,698 Posts Drives: eVeRyOnE mAD! Join Date: Dec 2020 Location: neither here nor there... iTrader: (0) Garage List 2021 BMW X5 xDrive 45e [9.88]	when you're changing tire sizes from OEM, it's recommended the new tires be within 3% of the height and diameter of your original tires. going beyond that puts serious risk of premature AWD drivetrain failure. it's more than simply "will it fit?" it's "will it be safe and function properly?" it's best practice to mount OEM approved sizes for your particular vehicle. that being said, I remotely recall a couple guys who installed larger than OEM sidewalls claiming no issues.
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11-12-2021, 05:42 AM	#5
Chas8283 Lieutenant 352 Rep 442 Posts Drives: BMW X5M Join Date: Sep 2021 Location: NYC iTrader: (0)	Turbobusa changed tire size. Look for his thread a few below yours on “how to get a smoother ride.”
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11-12-2021, 07:58 AM	#8
Poleposition ~~~~~~~~~~~~~ 514 Rep 1,437 Posts Drives: very well Join Date: Sep 2008 Location: NY iTrader: (2)	Larger sidewalls on the same rims will give a very different look to the whole vehicle. Can you get tires to fit? Yes. Should you? Maybe not. Its just a few millimeters we're talking about but it makes a world of difference. I dont think you'll be happy with the look and the ride wont improve all that much. I installed the H&R's and have zero regrets. Between the H&R's and the spacers, the truck now looks soooo aggressive and beefy. Ride quality certainly did not suffer. I would hear about it everyday if it did as it is my wifes daily. I strongly recommend against the increased sidewalls. i think youll regret it. __________________ 2022 Individual M5 Comp Venetian Violet 2021 X6M Comp 2024 i4 M50 on order IG @purpleM5Comp_NY
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03-14-2022, 05:41 AM	#12
robertg Lieutenant 117 Rep 448 Posts Drives: 2015 F80 M3 Join Date: Apr 2012 Location: Maryland iTrader: (0)	So what is the optimal tire/rim size for a square winter setup that falls within factory specs for not messing up AWD/transfer case?
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03-31-2022, 07:23 PM	#21
JIMX681 Private First Class 120 Rep 193 Posts Drives: 2022 X5M Comp Join Date: Jan 2010 Location: Baltimore iTrader: (0)	Went with 275/40/22 and 325/35/22 Michelin PS4S. Attached Images Last edited by JIMX681; 04-01-2022 at 06:53 AM..
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04-01-2022, 07:32 PM	#22
JIMX681 Private First Class 120 Rep 193 Posts Drives: 2022 X5M Comp Join Date: Jan 2010 Location: Baltimore iTrader: (0)	Don't try to go any wider on the front. 275/40/22 was perfect. Hopefully a 335/35/22 will be made.
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