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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Tire Pressure



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      08-26-2005, 09:41 PM   #1
Wildcat Jon
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Tire Pressure

What is the ideal tire pressure for the 330i sp front and rear? I'd heard 32 front and 36 rear but saw others posting much higher psi. I've had my e90 for a month with 2000 miles and checked the tire pressure for the first time today - 38 front, 41 rear - seems way too high to me, so I let out air to 32 f/36 r. Thoughts?
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      08-26-2005, 09:50 PM   #2
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Quote:
Originally Posted by Wildcat Jon
What is the ideal tire pressure for the 330i sp front and rear? I'd heard 32 front and 36 rear but saw others posting much higher psi. I've had my e90 for a month with 2000 miles and checked the tire pressure for the first time today - 38 front, 41 rear - seems way too high to me, so I let out air to 32 f/36 r. Thoughts?
I also have a 330i w/SP and I'm trying to figure out the same thing. The label in the Driver door jam states 38 psi front and 45 rear but that seem way too high, not to mention a very bumpy ride. Two weeks ago I had to bring my car into to a dealer to replace one of the runflat tires and they re-adjusted the pressure for all the tires: 34 psi front and 41 rear. I still don't know if that's the correct pressure.
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      08-27-2005, 08:37 AM   #3
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Read the owners handbook.
It will give tire pressuese for model. weight load, etc...
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      09-06-2005, 10:05 AM   #4
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same issue here! I have the pirellis on 17 mixed 161s, and i put them as low as 25 all round; now 27. but still rough on bumpy roads here. Is 25/26 too low? any idea how it will affect the tyres?
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      09-06-2005, 11:20 AM   #5
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my dealer says that 42 all around is perfect (for the 330 bridgestone run flats)...
seems fine by me.
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      09-06-2005, 11:24 AM   #6
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Quote:
Originally Posted by Wildcat Jon
What is the ideal tire pressure for the 330i sp front and rear? I'd heard 32 front and 36 rear but saw others posting much higher psi. I've had my e90 for a month with 2000 miles and checked the tire pressure for the first time today - 38 front, 41 rear - seems way too high to me, so I let out air to 32 f/36 r. Thoughts?

Hi 330i owner, do yourself a favour and set your tyre pressures all round to 2.8 bar, it works for me with the 162's on my E90 330i
go well and enjoy that car like i do. cheers arnold
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      09-06-2005, 04:47 PM   #7
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Quote:
Originally Posted by e90jamaica
same issue here! I have the pirellis on 17 mixed 161s, and i put them as low as 25 all round; now 27. but still rough on bumpy roads here. Is 25/26 too low? any idea how it will affect the tyres?

I would say its definatly too low. With those pressures, the ride will certainly feel smoother, but you will have a significant drop in the grip and handling of the car, and not only that, with that low of a pressure your wheels are alot more succesptable to getting bent/damaged.

I would raise the pressure up to the mid-30s
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      09-07-2005, 05:21 AM   #8
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Inside the door facing and in the manual it says 32 FR and 36 R on the 330i sport pkg if you're going under 100 mph. Over 100 mph says 38/41 (I think). Ride is better since I let the air out. Now I'm running 32/36.
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      09-07-2005, 08:32 AM   #9
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36 here and shimmy is not as bad
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