[Orient330iNYC]

Originally Posted by awesoM

I was talking to my SA about going down this path and he said that he was a bad idea with the "wrong" tire size and a bad transfer case would be on me. Not sure I agree? Need some help to rebutt. Not too good in speaking tires. :-)

yes, that is the concern if you deviate. as long as the diameter is the same front to rear and side to side there is no issue with the transfer case or the diffs. issue will be, they will argue that only stock tire sizes are approved and then you'll need to fight if anything arises.

the stock sizes even though staggered are the same diameter.

the issue he is speaking of, is if the tires don't match in diameter, something has to absorb the difference. front to rear the transfer case will constantly have to slip to absorb the difference, and that will eventually wreck it. if its side to side, the diffs will need to absorb it.

im assuming you are looking to do all seasons for wintry weather?
you could also do a set of snows tires on rims if you have the storage space. I specced the 755M rims with summer runflats and im going to be getting another set of rims, probably tire rack aftermarket to put 20 or 21" snows on.

[streborx]

I'm still a ways off from needing new shoes, but I'll probably square up with 285/40R22s when the time comes. Several options offering 50K+ mile warranties exist, so I'll keep them balanced every 5K and hope for some decent wear.

[Orient330iNYC]

Originally Posted by streborx

I'm still a ways off from needing new shoes, but I'll probably square up with 285/40R22s when the time comes. Several options offering 50K+ mile warranties exist, so I'll keep them balanced every 5K and hope for some decent wear.

be aware you cant rotate unless you replace the rear rims with a set of front rims. the 10.5" rim will hit the suspension up front even though the tire clears.

without documented rotation, michelin, for example, cuts the treadwear warranty in half.

[asianrage]

Originally Posted by Orient330iNYC

be aware you cant rotate unless you replace the rear rims with a set of front rims. the 10.5" rim will hit the suspension up front even though the tire clears.

without documented rotation, michelin, for example, cuts the treadwear warranty in half.

Spacers works. I have 15mm spacers in the front. Should get the extended bolts too.

[awesoM]

Originally Posted by Orient330iNYC

yes, that is the concern if you deviate. as long as the diameter is the same front to rear and side to side there is no issue with the transfer case or the diffs. issue will be, they will argue that only stock tire sizes are approved and then you'll need to fight if anything arises.

the stock sizes even though staggered are the same diameter.

the issue he is speaking of, is if the tires don't match in diameter, something has to absorb the difference. front to rear the transfer case will constantly have to slip to absorb the difference, and that will eventually wreck it. if its side to side, the diffs will need to absorb it.

im assuming you are looking to do all seasons for wintry weather?
you could also do a set of snows tires on rims if you have the storage space. I specced the 755M rims with summer runflats and im going to be getting another set of rims, probably tire rack aftermarket to put 20 or 21" snows on.

Yeah, i wanted the A/S for light snow outings. I was able to do a wheel swap locally for the 754Ms. They do not look as edgy as the 22s, but I don't have to worry about swapping wheels anymore. Thank you for your help!

[m20e3087]

@orient330inyc, just came across this post, planning to run 275 or 285 square, any recommendations on spacers to get the look of 315 on the rear. Looking at pilot all season 4 SUV.

[xlover]

If you are gonna keep the vehicle a bit why not invest in a second set of the front dimension rims for the rear and just fit the stock front tire size for the rear. This is how the x7 comes set up if the 21s are ordered, same rim all around. They should offer the 22s like this but are obsessed with only offering staggered config in the larger sizes.

[rob_r2]

I feel like getting the matching front wheels to run on the back seems safest, but am I just being spooked? Tire Rack felt pretty confident that the Bridgestone 275s would be fine on the wider wheels in the back, but the local BMW dealer doesn't seem to have a clue so hoping for some tribal knowledge share here!

[M4CompConv/X7]

Originally Posted by Bruce322

Thanks for the explanation again.

I usually do tire changes at dealers too, the service rep was willing to work with this kind of request for another car earlier. I will probably do 285/40/22 square set up. so increase from 275 to 285 for front, and decrease from 315 to 285 for rear.

I put a deposit to reserve the 1st 2023 x7 allocation back in February. Hope it will arrive soon!

I believe there is someone on here that ran 285/45 x 22, in case you wanted slightly more clearance and improved road hazard protection.

[bavarian1]

I spoke to couple of tire shops. They say even though 285/40/22 square set up should fit ok but given rears will be more stretched the revs will be different and can run into issues with transfer case. Is that something I should worry about? How much mileage people have put in with 285/40/22 square set up? Thanks in advance.

[Orient330iNYC]

Originally Posted by bavarian1

I spoke to couple of tire shops. They say even though 285/40/22 square set up should fit ok but given rears will be more stretched the revs will be different and can run into issues with transfer case. Is that something I should worry about? How much mileage people have put in with 285/40/22 square set up? Thanks in advance.

sidewall stretch does NOT affect the diameter of the tire.
the rolling diameter will be the same. the diameter of the tire is set by the steel belts, that will not change if the tire is stretched. 285/40/22 is within spec for both the front and rear rim widths. tire inflation can affect the effective diameter of the tire, rim width will not.

[Saejin]

Originally Posted by rob_r2

I feel like getting the matching front wheels to run on the back seems safest, but am I just being spooked? Tire Rack felt pretty confident that the Bridgestone 275s would be fine on the wider wheels in the back, but the local BMW dealer doesn't seem to have a clue so hoping for some tribal knowledge share here!

Has anyone tried this. I gave up my 22s as I didn’t want to deal with swapping back and forth although now that I live in TX, kinda kicking myself for not just keeping the 22s, but have been looking for an aftermarket setup anyway.

But I would think if you can run a set of fronts on the rear, this would be ideal.

[Orient330iNYC]

Originally Posted by Saejin

Has anyone tried this. I gave up my 22s as I didn’t want to deal with swapping back and forth although now that I live in TX, kinda kicking myself for not just keeping the 22s, but have been looking for an aftermarket setup anyway.

But I would think if you can run a set of fronts on the rear, this would be ideal.

it will look a little stretched but its fine.

275/40/22 has a wheel width range of 9-11"

[bavarian1]

Putting 9.5 in the back won’t affect brakes and won’t touch anything ? Sorry my knowledge is too bad about this topic 😊😊

[Orient330iNYC]

Originally Posted by bavarian1

Putting 9.5 in the back won’t affect brakes and won’t touch anything ? Sorry my knowledge is too bad about this topic 😊😊

Nope, rim is 1" narrower and the tire is 1.5" narrower. Plenty of space.
The front brakes are larger caliperwise than the rear, so the front rims will fit fine in the back. You might need some spacers for appearance, i think the face of the rim will be about 1/2 an inch inset more than 10.5s in the rear. But clearance will be fine.

[sbt007]

The black 22s look great. But almost feel like it is worth getting the 21s and powder coating them to avoid all of this tire size calculation.

[Phasers]

Originally Posted by sbt007

The black 22s look great. But almost feel like it is worth getting the 21s and powder coating them to avoid all of this tire size calculation.

After my '24 was delivered with the 22" black rims, I had the exact same thought/regret. But it looks great.

[radasif]

I actually changed from the 22” black rims to the 21”. As much as l like the black rims, the hassle of changing the tires and or wheels was just too much for me to deal with.

[floop]

Orient330iNYC

Thank you for all the advice on this thread. One of the selectable square setups in iDrive is 275/50R20. Seems like there is a decent selection of winter tires in this size. Do you think it would work to mount that size tire on the Style 738s or 740Ms that are generally found on the G05? Those wheels are listed as size 20x9 ET35. My cursory web research suggests 275/50R20 can use a rim from 7.5 inches to 9.5 inches, so it seems like 738s or 740Ms would work. But given my general ignorance on this topic, I'm hoping someone could confirm it for me.

[sbkim]

I am currently planning to run 275/40/22 all season, square set up, using aftermarket wheels (22x9.5). I had a couple questions:

1. Should I select that I have factory 275/40/22 and 315/35/22 in the iDrive since that matches my rolling diameter or can I specify something different to match square setup?

I have OEM 21" square setup currently in the iDrive which will be off from the new 275/40/22 setup.

2. What about tire pressure ? Go with recommended 35 and 42 even though I am running 275s in the front and back?

Thanks

[Streetdaddy]

I guess getting a set of factory 9.5’s all the way around on nrf’s with a spare would be the holy grail.

I like the look of the 22” but man that’s a big outlay just for a wheel setup. A $10k setup. Hard to swallow when i just dropped 84!

Guess i’ll stick with my 21” for now

[JJacksonIII]

Originally Posted by sbkim

I am currently planning to run 275/40/22 all season, square set up, using aftermarket wheels (22x9.5). I had a couple questions:

1. Should I select that I have factory 275/40/22 and 315/35/22 in the iDrive since that matches my rolling diameter or can I specify something different to match square setup?

I have OEM 21" square setup currently in the iDrive which will be off from the new 275/40/22 setup.

2. What about tire pressure ? Go with recommended 35 and 42 even though I am running 275s in the front and back?

Thanks

I would think you should definitely NOT go with 42 in the rears if they are 275/40/22. That recommendation is for the 315s, correct?