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E90 325i -Tire pressure for tires that are not shown in the sticker? 245/30ZR19 89YXL
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08-21-2024, 03:19 AM | #1 |
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E90 325i -Tire pressure for tires that are not shown in the sticker? 245/30ZR19 89YXL
Hi,
I just bought an E90 BMW 325i (2005) and it has rear tires that I don't know the correct tire pressure for. Rear tires: Michelin 245/30ZR19 89Y XL Do you know what pressure is optimal for these tires on my car? Currently 42psi (2.9 bars) is giving me the tire pressure low - warning. I managed to find someone with a 2019 M240i Convertible RWD who runs them at 49psi (3.4 bar), but I'm not sure if I should go that high. My front tires are Michelin 225/35ZR19 88Y and the sticker shows the correct pressure for them is 34-40psi (2.4 - 2.8 bar). Thanks for the help! |
08-23-2024, 10:45 PM | #2 |
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42 is way too high.
Try something like 35 front and 38-39 rear. If you get an error for low pressure somethings likely wrong with the tpms sender
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09-15-2024, 07:58 PM | #3 |
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Use this site: https://tiresize.com/pressure-calculator/
Plug in the info from the door jam as OEM tire and your current setup as new tire, should give you a safe starting point with appropriate load rating then you can fine tune based on tire wear. |
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09-18-2024, 01:37 PM | #4 |
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I've been running a square wheel setup with 235/35R19 (on 8,5x19"s) for 10 years, and most often been running around 2,8 - 3,0 Bars (40,6-43,5 PSI) in the front and 3,0-3,2 Bars (43,5-46,4 PSI) in the rear. I just chose the closest OE tire dimension pressure, using the maximum load value (without running maximum load of course ^^).
The Michelin PSS that I ran from 2014-2024 lasted 31k miles (and still about 3mm of thread). I think I have this pressure plaque: https://www.puretyre.co.uk/wp-conten...rd-600x264.jpg And as you see most values are pretty close.
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325i, e90, michelin, question, tire pressure |
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