Michelin Pilot Recommended Tire Pressure?

36 front and rear should be a good starting point.

 

That is pretty high. I would have started with more like 32 psi front and rear.

 

I run 33psi

 

I run Nitrogen at 31 psi cold. builds up to 34 warm. Anything higher rides like steel wheel on rough pavement. 430 Stock sizes.

 

Open the driver door and inflate to the specs on the plate.

Running lower psi risks rim damage but up to the driver.

 

I run 32 front 35 rear cold. If I’m not mistaken, the manual for the 430 states that if your car came with Pirelli's, the recommended pressures are 32F/32R, if Bridgestones 33F/36R, if Michelins 32F/35R, and if Goodyear run-flats 36F/36R. I’m running Michelins on 430 factory wheels, so I run 32F/35R.

 

Googled your tires to be next
Front: XL loadindex 91/ 1356lbs maxload AT 42psi
Rear XL loadindex 102/ 1874lbs maxload AT 42 psi.
This is for up to 160kmph/99mph, for higher speed you need more pressure.

Can make you a pressure/loadcapacity list for both tires for 99mph and using 90% of the loadcapacity belonging to the pressure.
This gives highest reserve with still acceptable comfort and gripp. Can also make for other max speeds, and reserves.

Then you "only" have to determine the load in axles acurately, and search that back in the list.
Succes with that, the most tricky part in it all.

 

How wide are your wheels? Also do you have a pic of how the tire looks on the wheels?

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Also about rimmwidth for tirewidth and aspect ratio, I did research
ETRTO " allows" on 305/30 rimwidth of between 10inch and 11.5 inch, measure rimm( is ideal) 11 inch
The 255/30, between 8.5inch and 9.5 inch, measure rimm 9 inch.

Now see what topicstarter has

 

Sj- There are no specs for MPS4S tires on the tire data stickers. Ferrari's tire pressure recommendations are all empirical based on testing for each tire type.

 

I'm shocked you can fit 255 in front, I assume fenders rolled. 32 should be good.

 

Here the pressure/ axleload list
For max speed 160kmph/99mph, wich you wont go over for even a minute.
Then 90 % used of the loadcapacity, belonging to the pressure, so dont go adding reserve yourselfes.

Carmakers often use GAWR and maximum technical carspeed to calculate the pressure for, but no reserve added.
But nowadays more often yust reference-pressure of standard load 35 or 36psi, and XL/reinforced /Extraload 41 or 42psi, wich is then mostly much higher then needed to prefent overheating.

Front
255/30ZR19 91Y
Axleload/ psi
927 lbs / 14 psi
983 lbs. / 15 psi
1038 lbs/ 16 psi
1093 lbs/ 17 psi
1149 lbs/ 18 psi
1204 lbs/ 19 psi
1259 lbs/ 20 psi
1313 lbs/ 21 psi
1368 lbs/ 22 psi/minimum adviced
1423 lbs/ 23 psi
1477 lbs/ 24 psi
1531 lbs/ 25 psi
1585 lbs/ 26 psi
1639 lbs/ 27 psi
1693 lbs/ 28 psi
1747 lbs/ 29 psi
1801 lbs/ 30 psi
1855 lbs/ 31 psi
1908 lbs/ 32 psi
1962 lbs/ 33 psi
2015 lbs/ 34 psi
2069 lbs/ 35 psi
2122 lbs/ 36 psi
2175 lbs/ 37 psi
2228 lbs/ 38 psi
2281 lbs/ 39 psi
2334 lbs/ 40 psi
2387 lbs/ 41 psi
2440 lbs/ 42 psi/referencepressure
2493 lbs/ 43 psi
2546 lbs/ 44 psi/ sometimes max cold
2599 lbs/ 45 psi
2651 lbs/ 46 psi
2704 lbs/ 47 psi
2756 lbs/ 48 psi
2809 lbs/ 49 psi
2861 lbs/ 50 psi
2914 lbs/ 51 psi/often max cold
2966 lbs/ 52 psi
3018 lbs/ 53 psi
3070 lbs/ 54 psi
3122 lbs/ 55 psi
3175 lbs/ 56 psi
3227 lbs/ 57 psi
3279 lbs/ 58 psi
3331 lbs/ 59 psi
3383 lbs/ 60 psi/ sometimes max cold

Rear 305/30ZR19 102Y
Axleload/psi
1281 lbs/ 14 psi
1358 lbs/ 15 psi
1435 lbs/ 16 psi
1511 lbs/ 17 psi
1588 lbs/ 18 psi
1664 lbs/ 19 psi
1740 lbs/ 20 psi
1815 lbs/ 21 psi
1891 lbs/ 22 psi/ minimum adviced
1966 lbs/ 23 psi
2041 lbs/ 24 psi
2116 lbs/ 25 psi
2191 lbs/ 26 psi
2266 lbs/ 27 psi
2341 lbs/ 28 psi
2415 lbs/ 29 psi
2489 lbs/ 30 psi
2564 lbs/ 31 psi
2638 lbs/ 32 psi
2712 lbs/ 33 psi
2785 lbs/ 34 psi
2859 lbs/ 35 psi
2933 lbs/ 36 psi
3006 lbs/ 37 psi
3080 lbs/ 38 psi
3153 lbs/ 39 psi
3226 lbs/ 40 psi
3300 lbs/ 41 psi
3373 lbs/ 42 psi/referencepressure
3446 lbs/ 43 psi
3519 lbs/ 44 psi/ sometimes maxcold
3591 lbs/ 45 psi
3664 lbs/ 46 psi
3737 lbs/ 47 psi
3809 lbs/ 48 psi
3882 lbs/ 49 psi
3954 lbs/ 50 psi
4027 lbs/ 51 psi/ often maxcold
4099 lbs/ 52 psi
4171 lbs/ 53 psi
4243 lbs/ 54 psi
4315 lbs/ 55 psi
4387 lbs/ 56 psi
4459 lbs/ 57 psi
4531 lbs/ 58 psi
4603 lbs/ 59 psi
4675 lbs/ 60 psi/ sometimes maxcold

 

255 up front? Do you have rubbing?


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I have Novitec NF2 wheels on my 360. 245/35/19 front 29psi, 345/30/19 rear 26 psi. This has worked well for 5 years. Thanks Jadatis for all that info.

 

Can make lists for those sises too if you like. Most likely also XL. most ZR low aspect ratio tires are XL.
This larger sise expected higher maxload, so lower pressure justified.

 

Ive swapped from pirelli corsa to pilot sport cup 2 connect and on both running 32psi, which is what is says on door card
Id imagine if michelin dont recommend a pressure then the door card is good advice

 

If you keep same sises as OEM from orher brand, maxload and referencepressure is the same, so recomended pressure on car can be held.