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brawas 11-05-2012 06:30 PM

Tire Pressure
Hi guys

I did some searching around and can't find a clear answer. I have a BMW 2008 328i Convertible (E93). The stock tires are 225/45/R17. I replaced them with 215/50/R17 for winter tires (Toyo Observe Garit KX). What I'm trying to figure out is the recommended tire pressure for these wheels on my car. The manual shows a variety of different sizes and recommendations, but nothing with 215 (most are 225 or 205).

The tires say 50psi max on them and I currently have them at 45psi all round. The reason I went so high is cause they looked low otherwise.

Any suggestions? Your help is appreciated.

Quack 11-05-2012 07:34 PM

add 4psi to what the stock 225 tire pressures are for the winter, that's what dealers do.

Blackedout95 11-05-2012 11:42 PM

As a general rule of thumb I like 35, not hard and not soft, nice good medium. Of course it's all up to feel for the driver, some insist on a firmer 40+psi.

You may also find tire wear differs at 35 vs 40 or more. That would take time to figure out and miles so... best to spend a week at 35 and then at 40 and see if you can tell any difference.

Zook@SCB 11-06-2012 10:25 AM

Run Factory Recomended Pressure.

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