New Michelin PS 4S 255/295 on 718M

12v_dub · 09-23-2020, 05:23 PM

I finally upgraded to my old Bridgestone Potenzas RTF's to no RTF Michelin pilot sport 4s in 255/40 and 295/35 on the stock 21" 718M wheels. Mounting was done without any issues and the ride is much smoother and quieter. I really like slightly meatier sidewall especially on the rears. During higher speeds, car feels more planted but I do feel the turning is slightly slower with this staggered set up. Regardless, I wish I have switched long time ago but was worried with fitment issues. I have 0 rubbing at full turn and I am lowered on H&R springs.
With this set up I’m still at .3% difference between front and rears.

_ink · 09-24-2020, 01:10 AM

Nice! Congrats mate, definitely the tyre choice I'll be going with also.

ramparts · 09-24-2020, 01:17 AM

Quote:

Originally Posted by _ink

Nice! Congrats mate, definitely the tyre choice I'll be going with also.

Can you take a few more of the tyre side on so we can see the overhang better ?

comber · 09-24-2020, 04:29 AM

According to equivalency tables, maximum with for our rear rims (9.5") is 275 mm...

Don't you think it can be a bit dangerous when cornering fast?

12v_dub · 09-24-2020, 05:47 AM

Quote:

Originally Posted by davidoff86

Can you take a few more of the tyre side on so we can see the overhang better ?

I’ll take some better pics today

12v_dub · 09-24-2020, 07:49 AM

Quote:

Originally Posted by comber

According to equivalency tables, maximum with for our rear rims (9.5") is 275 mm...

Don't you think it can be a bit dangerous when cornering fast?

Different brand tires with better than other. Tire installer told me there was 0 problems or concerns when he was mounting them. I have done ton of research before purchasing this set, so I was very confident.

For example, X3M people are running 295's on the rear as well, and their wheel is 10" wide so not whole lot difference.
The only concern I would have is doing 265's on the front as it would rub against the strut. I put my hand there, and without any spacers there is only little room left. With that said, no rubbing at all at full turn, but I do plan on getting some spacers for more flush look in the future.

ramparts · 09-24-2020, 08:06 AM

what made you go with 295 on the rear ?

They do a
275/35 ZR21 (103Y) XL
and a
285/30 ZR21 (100Y) XL

12v_dub · 09-24-2020, 08:27 AM

Quote:

Originally Posted by davidoff86

what made you go with 295 on the rear ?

They do a
275/35 ZR21 (103Y) XL
and a
285/30 ZR21 (100Y) XL

Those won't work. I did my research.

comber · 09-24-2020, 08:54 AM

Quote:

Originally Posted by davidoff86

what made you go with 295 on the rear ?

They do a
275/35 ZR21 (103Y) XL
and a
285/30 ZR21 (100Y) XL

Diameter difference between front and rear must not be higher than 1% in our xDrive system...so with 255/40 at front none of them will work.

You can check it in websites like this: https://tiresize.com/comparison/

12v_dub · 09-24-2020, 08:58 AM

new updated photos

atrueb · 09-24-2020, 09:37 AM

Looks great! I see that you have spacers installed. What width are they and did you need to realign the steering geometry?

12v_dub · 09-24-2020, 10:30 AM

Quote:

Originally Posted by atrueb

Looks great! I see that you have spacers installed. What width are they and did you need to realign the steering geometry?

thanks. I don't have spacers installed but plan on doing 12mm all the way around

suby01 · 09-24-2020, 11:29 AM

So 255 45 20 and 295 40 20 should be similar to your % X drive difference with the 21"?

12v_dub · 09-24-2020, 11:32 AM

Quote:

Originally Posted by suby01

So 255 45 20 and 295 40 20 should be similar to your % X drive difference with the 21"?

255/45 wouldn't work, it would be at 3% circumference different. see comparison photo below

suby01 · 09-24-2020, 04:32 PM

So 1% is the max for our cars?

Torinalth · 09-24-2020, 05:29 PM

not bad. Wish I could cram more rubber in the front, but think I am near maxed out. even going to a 20mm would be hard to get to 285 let alone 295. But with no spacers running 295 in the rear, that tells us we can run 305s in the rear (yes with different wheels) and give us the same staggered setup as the x5 if we so choose. just thoughts. But nice info

suby01 · 09-24-2020, 05:45 PM

Quote:

Originally Posted by Torinalth

not bad. Wish I could cram more rubber in the front, but think I am near maxed out. even going to a 20mm would be hard to get to 285 let alone 295. But with no spacers running 295 in the rear, that tells us we can run 305s in the rear (yes with different wheels) and give us the same staggered setup as the x5 if we so choose. just thoughts. But nice info

You have 275 in the front?

12v_dub · 09-24-2020, 05:48 PM

Quote:

Originally Posted by suby01

So 1% is the max for our cars?

It’s what’s considered safe and approve by bmw

Torinalth · 09-24-2020, 08:11 PM

Quote:

Originally Posted by suby01

You have 275 in the front?

yep.

ramparts · 09-25-2020, 12:44 AM

Quote:

Originally Posted by Torinalth

Quote:

Originally Posted by suby01

You have 275 in the front?

yep.

You could have had the 275/285 if you went for something less than 255 at the front though. I checked myself and was getting only a 7mm difference in diameter

Skotcoop · 10-11-2020, 04:43 AM

That does look much better and probably what I'm looking to do as well. Can you take a picture of the tire flushness and one further back from the side to see the whole car?

GoodGuyAvi · 10-11-2020, 06:26 AM

nice ! thank you for sharing!

09-23-2020, 05:23 PM	#1
12v_dub Second Lieutenant 295 Rep 279 Posts Drives: 21' M340i Join Date: Mar 2015 Location: Atlanta, GA iTrader: (3)	New Michelin PS 4S 255/295 on 718M I finally upgraded to my old Bridgestone Potenzas RTF's to no RTF Michelin pilot sport 4s in 255/40 and 295/35 on the stock 21" 718M wheels. Mounting was done without any issues and the ride is much smoother and quieter. I really like slightly meatier sidewall especially on the rears. During higher speeds, car feels more planted but I do feel the turning is slightly slower with this staggered set up. Regardless, I wish I have switched long time ago but was worried with fitment issues. I have 0 rubbing at full turn and I am lowered on H&R springs. With this set up I’m still at .3% difference between front and rears. Attached Images Last edited by 12v_dub; 09-23-2020 at 08:35 PM..
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09-24-2020, 01:10 AM	#2
_ink Jedi samurai ninja turtle 619 Rep 3,021 Posts Drives: X3 M40i 2018 Join Date: May 2012 Location: Sydney, Australia iTrader: (0) Garage List 2018 X3 M40i [0.00]	Nice! Congrats mate, definitely the tyre choice I'll be going with also.
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09-24-2020, 04:29 AM	#4
comber Lieutenant 330 Rep 501 Posts Drives: 2021 X4 M40i Join Date: Apr 2018 Location: Spain iTrader: (0)	According to equivalency tables, maximum with for our rear rims (9.5") is 275 mm... Don't you think it can be a bit dangerous when cornering fast?
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09-24-2020, 08:06 AM	#7
ramparts Colonel 1126 Rep 2,247 Posts Drives: M40i Join Date: Apr 2015 Location: UK iTrader: (0)	what made you go with 295 on the rear ? They do a 275/35 ZR21 (103Y) XL and a 285/30 ZR21 (100Y) XL
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09-24-2020, 08:58 AM	#10
12v_dub Second Lieutenant 295 Rep 279 Posts Drives: 21' M340i Join Date: Mar 2015 Location: Atlanta, GA iTrader: (3)	new updated photos Attached Images
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09-24-2020, 09:37 AM	#11
atrueb Second Lieutenant 60 Rep 236 Posts Drives: BMW X3 G01 Join Date: Feb 2014 Location: Zurich iTrader: (0)	Looks great! I see that you have spacers installed. What width are they and did you need to realign the steering geometry?
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09-24-2020, 11:29 AM	#13
suby01 Cowboy Astronaut Millionaire 2314 Rep 2,886 Posts Drives: 2020 X3 M40i Join Date: Aug 2019 Location: CT, USA iTrader: (0)	So 255 45 20 and 295 40 20 should be similar to your % X drive difference with the 21"? __________________ The Youtubes https://youtu.be/gzinBJjxIUY Insta https://www.instagram.com/gatosandturbos/
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09-24-2020, 04:32 PM	#15
suby01 Cowboy Astronaut Millionaire 2314 Rep 2,886 Posts Drives: 2020 X3 M40i Join Date: Aug 2019 Location: CT, USA iTrader: (0)	So 1% is the max for our cars? __________________ The Youtubes https://youtu.be/gzinBJjxIUY Insta https://www.instagram.com/gatosandturbos/
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09-24-2020, 05:29 PM	#16
Torinalth First Lieutenant 195 Rep 312 Posts Drives: 2019 x3 M40i Join Date: Oct 2018 Location: North Carolina iTrader: (0) Garage List 2019 BMW X3 M40i [0.00]	not bad. Wish I could cram more rubber in the front, but think I am near maxed out. even going to a 20mm would be hard to get to 285 let alone 295. But with no spacers running 295 in the rear, that tells us we can run 305s in the rear (yes with different wheels) and give us the same staggered setup as the x5 if we so choose. just thoughts. But nice info __________________ 2019 X3 M40i - Phytonic Blue - MST Intake, VRSF Chargepipe, ER catted/coated DP, Dorch Stage 2 HPFP, BM3 stage 2+ e30, XHP stage 3, 275/40/20 Michelin MPS4
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10-11-2020, 04:43 AM	#21
Skotcoop First Lieutenant 269 Rep 335 Posts Drives: G01 Join Date: Jan 2015 Location: Everett iTrader: (0)	That does look much better and probably what I'm looking to do as well. Can you take a picture of the tire flushness and one further back from the side to see the whole car? __________________ 2010 135i M-sport SOLD 2019 X3 M40i Glacier silver w/cognac
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10-11-2020, 06:26 AM	#22
GoodGuyAvi Captain 1497 Rep 841 Posts Drives: G80 Join Date: Oct 2011 Location: Private Island iTrader: (0)	nice ! thank you for sharing!
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