[Mad Nike]

Hey everyone,

Just got the M340i last week, absolutely love it. I'm running 225/40r19 Pirelli Run-flat all around and it's a joke traction wise. Planning on getting 19" wheels with 8.5" in the front and 9.5" in the back. Contemplating between tire sizes though. Going to go for Michelin PS4S.

Front: 225/40r19
Back: 255/35r19

VS

Front: 235/40r19
Back: 265/35r19

I understand 235/265 are going to look beefier than 225/255. I saw multiple cars with 225/255 and couple with 235/265 setup.

As far as handling and/or comfort goes, any feedback from someone who already did these setups? Wondering if it's noticeable.

I also assume Michelin PS4S going to be less bumpy than my current Allseason Runflats.

[Rocket455]

Can't speak to the 265/35/19s for the rear, but I have a square aftermarket set up with Michelin PS4S 235/40/19s all the way around, and can tell you there is a night-and-day difference in ride comfort and grip...and I'm really not even that picky. Didn't realize how "bad" the stock RFTs until I upgraded and realized what I had been missing out on.

https://g20.bimmerpost.com/forums/sh....php?t=1753049

[Mad Nike]

Originally Posted by Rocket455

Can't speak to the 265/35/19s for the rear, but I have a square aftermarket set up with Michelin PS4S 235/40/19s all the way around, and can tell you there is a night-and-day difference in ride comfort and grip...and I'm really not even that picky. Didn't realize how "bad" the stock RFTs until I upgraded and realized what I had been missing out on.

https://g20.bimmerpost.com/forums/sh....php?t=1753049

Dude, appreciate the feedback on my other thread. I don't see any photos, can you reupload those? Thanks!

[Rocket455]

Originally Posted by Mad Nike

Dude, appreciate the feedback on my other thread. I don't see any photos, can you reupload those? Thanks!

That's odd; the images seem to load up fine on my end, even when not signed in and on a different browser.

Anyway, re-attaching here:

[MBM340]

Originally Posted by Mad Nike

Hey everyone,

Just got the M340i last week, absolutely love it. I'm running 225/40r19 Pirelli Run-flat all around and it's a joke traction wise. Planning on getting 19" wheels with 8.5" in the front and 9.5" in the back. Contemplating between tire sizes though. Going to go for Michelin PS4S.

Front: 225/40r19
Back: 255/35r19

VS

Front: 235/40r19
Back: 265/35r19

I understand 235/265 are going to look beefier than 225/255. I saw multiple cars with 225/255 and couple with 235/265 setup.

As far as handling and/or comfort goes, any feedback from someone who already did these setups? Wondering if it's noticeable.

I also assume Michelin PS4S going to be less bumpy than my current Allseason Runflats.

I am in the EXACT same boat as you. Just got mine, and the Grand Touring tires they put on here (Bridgestone LS 100 A) are bloody H Rated...smh. They have ZERO grip. Horrible tires for this car. BMW should be drawn and quartered.

So after talking with one of our esteemed Bimmerpost contributors, I am likely going to go with 235/40 all around as I have the square setup. I have RWD so trying to decide between Max performance Summer or UHP All season. Leaning toward the latter but will let you guys know.

[Mad Nike]

Originally Posted by Rocket455

That's odd; the images seem to load up fine on my end, even when not signed in and on a different browser.

Anyway, re-attaching here:

Nice, thank you for those pics, looks great!

[Mad Nike]

Originally Posted by MBM340

I am in the EXACT same boat as you. Just got mine, and the Grand Touring tires they put on here (Bridgestone LS 100 A) are bloody H Rated...smh. They have ZERO grip. Horrible tires for this car. BMW should be drawn and quartered.

So after talking with one of our esteemed Bimmerpost contributors, I am likely going to go with 235/40 all around as I have the square setup. I have RWD so trying to decide between Max performance Summer or UHP All season. Leaning toward the latter but will let you guys know.

Yeap, I feel you. I'm on Pirellis Cinturato P7 All Season, but pretty sure it's similar to your Bridgestone.

Are you putting 235/40 on stock 8" wheels? Or you are getting aftermarket 8.5"?

[MBM340]

Originally Posted by Mad Nike

Yeap, I feel you. I'm on Pirellis Cinturato P7 All Season, but pretty sure it's similar to your Bridgestone.

Are you putting 235/40 on stock 8" wheels? Or you are getting aftermarket 8.5"?

I am keeping the stock sized squared rims and hoping that a Y rated Michelin AS3+ will give me adequate grip. Actually stock sized tires too, that is another story about BMW and the warranty...225/40/19s

Will let you guys know. I get them installed on Friday.

[ultrared93]

Originally Posted by MBM340

I am keeping the stock sized squared rims and hoping that a Y rated Michelin AS3+ will give me adequate grip. Actually stock sized tires too, that is another story about BMW and the warranty...225/40/19s

Will let you guys know. I get them installed on Friday.

Mind sharing what the warranty issues are, or is this a condition of a lease agreement? Thanks.

[MBM340]

Originally Posted by ultrared93

Mind sharing what the warranty issues are, or is this a condition of a lease agreement? Thanks.

Most BMW dealers say that the ECU will incorrectly determine that the tires are "slipping" and cause issues/failures with ASC/ABS and other systems. m.b. was told the same at a dealer on the left coast.

Not sure it is true, but that is thier reasoning.

[ultrared93]

Originally Posted by MBM340

Most BMW dealers say that the ECU will incorrectly determine that the tires are "slipping" and cause issues/failures with ASC/ABS and other systems. m.b. was told the same at a dealer on the left coast.

Not sure it is true, but that is thier reasoning.

If you pick tires that have the same diameter and within a couple of % of the same number of revolutions per mile, there would be no indication of slippage.

There are lots of users on this forum that have non-original tire sizes on their cars, even xDrive models where the same diameter is more important than on RWD cars.

[MBM340]

Originally Posted by ultrared93

If you pick tires that have the same diameter and within a couple of % of the same number of revolutions per mile, there would be no indication of slippage.

There are lots of users on this forum that have non-original tire sizes on their cars, even xDrive models where the same diameter is more important than on RWD cars.

I totally agree, just saying what the stealers are telling people...

[MBM340]

They arrived today. Installing at RRT on Friday.
Stoked!

[BayM340]

Originally Posted by ultrared93

If you pick tires that have the same diameter and within a couple of % of the same number of revolutions per mile, there would be no indication of slippage.

There are lots of users on this forum that have non-original tire sizes on their cars, even xDrive models where the same diameter is more important than on RWD cars.

Hey Ultra, I'm in the same boat like most of the posters on the thread, like MB. I'm due to receive my 21' 340 xDrive early Feb. Didn't realize that going with the 792M All-Season RFTs is basically the equivalent of shooting myself in the crotch... xDriver owners complaining about traction and performance all over.

I'm thinking of staggering and biting the bullet on 8.5" 792M OEMs, and running the AS3+
Your comment is making me second guess myself though. I see a few others have pulled it off. Would you advise against it?

MB - curious on why you didn't want to stagger given you're RWD? Hope it all goes well tomorrow, because I might be following in your footsteps soon brother...

[MBM340]

Originally Posted by BayM340

Hey Ultra, I'm in the same boat like most of the posters on the thread, like MB. I'm due to receive my 21' 340 xDrive early Feb. Didn't realize that going with the 792M All-Season RFTs is basically the equivalent of shooting myself in the crotch... xDriver owners complaining about traction and performance all over.

I'm thinking of staggering and biting the bullet on 8.5" 792M OEMs, and running the AS3+
Your comment is making me second guess myself though. I see a few others have pulled it off. Would you advise against it?

MB - curious on why you didn't want to stagger given you're RWD? Hope it all goes well tomorrow, because I might be following in your footsteps soon brother...

Good question, and I didn't order my car I bought it from a dealer who already had it or I probably would have. At this point I am going with the AS3+ with the square set up for now and we will see how it works. It can NOT be any worse that the H rated grand touring tires that were on the car from the factory.
I have been driving rear wheel drive BMWs forever and only car with staggered setup were to M36 M3s. Not worried about squared setup if the rubber is good enough. I will let you know.
Let me know what you end up going with.

[ultrared93]

Originally Posted by BayM340

Hey Ultra, I'm in the same boat like most of the posters on the thread, like MB. I'm due to receive my 21' 340 xDrive early Feb. Didn't realize that going with the 792M All-Season RFTs is basically the equivalent of shooting myself in the crotch... xDriver owners complaining about traction and performance all over.

I'm thinking of staggering and biting the bullet on 8.5" 792M OEMs, and running the AS3+
Your comment is making me second guess myself though. I see a few others have pulled it off. Would you advise against it?

Don't forget that you can configure xDrive cars with staggered setups from the factory. The thing you need to be careful of is matching the tire diameter (or with more precision the number of revolutions per mile) front to back. I don't know the maximum percentage difference that is permissible, but I would believe it is at least what exists in the ZTK hp tire setup (225/40x19 front vs. 255/35x19 rear). Perhaps a Genius would have that information.

[SpiveyCJ]

Things could have changed but when I ordered my car all season tires came squared, summer tires came staggered. Does anyone know why? I also have the lame H rated all season run-flats and am planning to replace with nor run flat performance all season as I'm in PA. Other than not being able to rotate them and being slightly cheaper, is there any reason to get squared over staggered?

[BayM340]

Originally Posted by ultrared93

Don't forget that you can configure xDrive cars with staggered setups from the factory. The thing you need to be careful of is matching the tire diameter (or with more precision the number of revolutions per mile) front to back. I don't know the maximum percentage difference that is permissible, but I would believe it is at least what exists in the ZTK hp tire setup (225/40x19 front vs. 255/35x19 rear). Perhaps a Genius would have that information.

Appreciate that advice. Going 225s AS3+ all around like MB for now. Hope the install is seamless for him as he is getting that done today.

Down the line I'm getting 8.5" 792M rears and throwing 255/35 19s, and staggering with an UHP Sumer set. (Will be throwing the squares when going to the snow.)

Thanks for the input everyone!

[BayM340]

Originally Posted by SpiveyCJ

Things could have changed but when I ordered my car all season tires came squared, summer tires came staggered. Does anyone know why? I also have the lame H rated all season run-flats and am planning to replace with nor run flat performance all season as I'm in PA. Other than not being able to rotate them and being slightly cheaper, is there any reason to get squared over staggered?

Something I learned on this tire research journey: https://blog.tirerack.com/blog/make-...-winter-use-v1

Check that article out CJ. Apparently you cut through deeper snow better with square vs staggered setup. All depends on where you're driving.

[MBM340]

Originally Posted by SpiveyCJ

Things could have changed but when I ordered my car all season tires came squared, summer tires came staggered. Does anyone know why? I also have the lame H rated all season run-flats and am planning to replace with nor run flat performance all season as I'm in PA. Other than not being able to rotate them and being slightly cheaper, is there any reason to get squared over staggered?

You need to ask m.b He and I have been going through this for weeks discussing...I kept it squared and just got Michelin Pilot Sport AS3+ tires.
He is going to stagger his and was going to get Conti's but now I believe is going with the AS3+ as well. Goodyear Exhilerate is an option as well.

[MBM340]

Originally Posted by BayM340

Appreciate that advice. Going 225s AS3+ all around like MB for now. Hope the install is seamless for him as he is getting that done today.

Down the line I'm getting 8.5" 792M rears and throwing 255/35 19s, and staggering with an UHP Sumer set. (Will be throwing the squares when going to the snow.)

Thanks for the input everyone!

Was going to have them installed today, but turns out I had to push the install into next Tuesday. Will let you all know how it goes and how they feel...

[Mad Nike]

Nice, keep us posted