Correct pressure for Michelin Sport 4S tires

[MichaelInChicago]

I recently changed the Dunlop RFT tires for the amazing Michelin Sport 4S tires of the same sizes.

Do I use the tire pressures recommended on the inside of the drivers door for these new tires or the pressures recommended by Michelin?

Thanks

[dsocold]

Originally Posted by MichaelInChicago

I recently changed the Dunlop RFT tires for the amazing Michelin Sport 4S tires of the same sizes.

Do I use the tire pressures recommended on the inside of the drivers door for these new tires or the pressures recommended by Michelin?

Thanks

i would run the ones setup by michelin but in general if it were me i would go with 36-38 psi all around and go from there.

How does it feel i went from rft to PSS on my 135 it was amazing cant wait to do it with my f06 640i

[Qsilver7]

With not knowing what the Michelin PSI recommendation is or where you got that info...I would suggest to start with the car manufacturer's recommendation first...then adjust to any personal preference if you don't care for the handling etc.

The tire's manufacturer's recommendation (usually found on the tire's sidewall) is usually a maximum inflation warning...since they have no idea as to the type of vehicle the tire is going to be mounted to...they just list an inflation pressure not to exceed for safety reasons.

[MichaelInChicago]

Thanks everyone. I will use the pressure listed on the car itself and adjust as I go.

As well. removing the boulder-like awful RFT tires and replacing them with the Michelin Sport 4S was transformative. It now drives and performs as I am sure it was originally designed to.

[Margas]

I just swapped to non-runflats and did the same research. The general consensus was to run with the pressure recommendations on the door.

[ezmaass]

Swapping to Michelin Pilot Sport A/S 3+ next week - can't wait to be done with these terrible RFTs. I honestly should have done it immediately after buying the car. I tried to give these a fair shake, but I should have known better after the experience with my 550.

Very much looking forward to the car driving as it should. BMW should wise up here.

[Frupal]

Originally Posted by MichaelInChicago

Thanks everyone. I will use the pressure listed on the car itself and adjust as I go.

As well. removing the boulder-like awful RFT tires and replacing them with the Michelin Sport 4S was transformative. It now drives and performs as I am sure it was originally designed to.

Thanks so much for posting. I intend to replace my boilers this summer and was waffling between a few brands. I am now convinced that the Michelin tires are the way to go.

[MichaelInChicago]

The sooner you do it, the better. As well, the Michelin Sport 4S tires are the best tires I have ever owned.

[V2M6Convert]

Do not make the mistake I did. M6 Convertible. Tried to save a few bucks. Wife wore out rear Pirellis within a year. Tried Toyo Proxy. All season. Could not handle the power. Back end very drifty under full throttle. Went back to Pirelli but was told to try the PS4. Have used PS2 on my track day Viper. Great but expensive and have found Nito to be cheaper and very good.

[ezmaass]

Originally Posted by MichaelInChicago

The sooner you do it, the better. As well, the Michelin Sport 4S tires are the best tires I have ever owned.

I see you have xDrive and are, like me, in a snowy area. Are you running a separate winter tire/rim setup? I had ordered my 650xi with the square A/S setup because I typically (always) have run a single tire all year. The Michelin A/S 3+ seems to be their 4S compromise if you're not going to run a summer only tire. I'll need to see how it goes. I'm sure summer performance will be fine, but we'll see about winter.

[MichaelInChicago]

I have a separate winter/tire setup and I keep a winter wheel/tire in the trunk in case of a flat.

Again, the Pilot 4S tires are simply the best performance tire I have ever owned. Quiet, comfortable, great response and the sidewalls are very strong and have shown no damage at all even though I have hit a few deep potholes, which would have left the RFT's in bubble ruin.

[Havy]

Originally Posted by MichaelInChicago

I recently changed the Dunlop RFT tires for the amazing Michelin Sport 4S tires of the same sizes.

Do I use the tire pressures recommended on the inside of the drivers door for these new tires or the pressures recommended by Michelin?

Thanks

Are you using BMW marked (*) tires? Or others. You should go with the pressure indicated in the door.
Here is another thread Air pressure

[Jsin357]

Time to change my RFTs I'm going with Nitto Invos

[JBF650]

I love my Shark but haaaaaaate the bloody hard as hell Dunlop RFT. I’m going to replace them, I’m planning to treat the car to some new shoes at Xmas. I’ve put up with the RFT for 6 months since buying the car and that’s enough.... they are the original tyres the car was delivered with 4 years ago. I spend my time constantly avoiding cracks and holes in the road to save the crash and bump that inevitably follows. Even in Comfort + mode it’s still crashy and unpleasant on these RFT. I don’t drive it in sport mode often because I cannot stand the harsh ride the RFT give. In the wet the car is ‘fun’ but the traction control goes crazy trying to contain the slip even on modest throttle take offs....

My question is what brand ? Michelin certainly seem to be favoured from what I see here. Talking to some good tyre people here they are very much advising the Michelin’s Sports too. I would never go for cheap anything when it comes to tyres and safety so my question isn’t about what is cheaper..... it’s more are there other brands recommend like pirelli or continentals? What are your thoughts and experience?

[TON-III]

Originally Posted by JBF650

I would never go for cheap anything when it comes to tyres and safety so my question isn’t about what is cheaper..... it’s more are there other brands recommend like pirelli or continentals? What are your thoughts and experience?

It's a bit odd while people are driving quite expensive cars they are willing to buy 'cheap' tires, as a matter of a fact tire is the most critical item in total suspension ( as many have noticed while running RF tires, came is loosen with those).

This beemer is my 1'st car with big tires, I'm was really surprised when installed my summer set up (Hankook Evo 1 S2 245/40 front / 275/35 rear as 19" ) how nicely car was floating, very good tires for that price !

[Frupal]

I settled on 35 front and 40 rear.

[Flintstone148]

Our 650i convertible had the Dunlop RF tires from the factory. Living in South Florida, and having better roads in general than our Northern friends, I had no ride quality concerns with the tires. However, I recently hit a broken piece of concrete pavement on I-95 at about 80 mph that produced a large bubble and bent the left front wheel. As the RFs are/were summer tires, and can not be used in temperatures less than 40, I changed all for Michelin A/S 3+ as we have family in SW Virginia. All four were road-forced balanced and a 4 wheel alignment performed.

Would have purchased Sport 4S, but it also has the cold weather limitations.

40 lbs front, 45 lbs rear. Car rides and handles very well.

Flintstone

[TON-III]

How many are having something weighty in rear axle ?

Front is more weighty as riding alone or together and therefore more psi on the front is more wise move ? At least I'm riding that way

[rorz12]

Originally Posted by Qsilver7

With not knowing what the Michelin PSI recommendation is or where you got that info...I would suggest to start with the car manufacturer's recommendation first...then adjust to any personal preference if you don't care for the handling etc.

The tire's manufacturer's recommendation (usually found on the tire's sidewall) is usually a maximum inflation warning...since they have no idea as to the type of vehicle the tire is going to be mounted to...they just list an inflation pressure not to exceed for safety reasons.

Old thread, but just want to say I ran the tire pressures listed on the door sill sticker (2.8 bar) and I wore through the centres of my rear PS4 tires in 10 months (just under 10k miles). Fronts have evenly worn at the same 2.8 bar.

So definitely recommend lowering the rear tire pressures to something like 2.4-2.5 bar especially if you rarely have passengers in the back.

[peoe]

I switched the OEM Dunlop SP Sport Maxx GT tires with Michelin A/S 4 on the 650xi GC and highly recommend to anyone still using run flats to go non run flats for comfort.

I recall looking at various places that sell those tires, including Michelin, and after entering my car details I was told that the front tire pressure must be set to 42 psi. oem is 39 front, 42 rear, so I've been setting at 42 psi front and rear.

These are the tires I got:
Michelin A/S 4
245/35ZR20 95Y XL BSW
MSPN : 3150

275/30ZR20 97Y XL BSW
MSPN : 64805

[TGrits10]

I'm on my 2nd or 3rd rounds of PS4s’s all around, and have played with the pressures quite a bit. Here're my findings:

TLDR: 34F / 32R

Front - I want to run as much pressure as possible to help with even wear, but have to keep it below 35 cold or tramlining gets bad, particularly on long drives where the tires heat up and pressures rise. Happy place is probably 34 cold? And then if I go to an autox I have to bleed out a little air after the first runs to keep the pressure (hot) at about 40 to maximize grip. The wear still ends up being concentrated on the shoulders, especially inner, which is inevitable for the front axle I guess.

Rear - I've been seeing shockingly even wear with very low pressures, like 30-32 cold, where the inner corner gives up the ghost just before the center area goes bald. The lower pressures are needed for both ride and handling, as I find harshness over bumps and pointy handling increasing dramatically with rising rear pressures. For this same reason I bump up the pressure at autox to help the car rotate better, essentially dialing out some of the factory understeer bias by destabilizing the rear a little.