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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 09-18-2011, 05:09 PM   #1
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Questions regarding tire pressure with different sizes

I was checking my pressures today with the brand new Motion pro gauge I bought for the track(thing is awesome!)... My pressures were WAY off but I had a question since then.

The pressures recommended on the side of the car are for stock tires, my car does not have stock tires so I was wondering if any adjustment should be made. I only drive on the street so I understand I probably will be OK with the recommended but I wanted an explanation, right now I have 225/45/18 in the front and 275/40/18 in the rear. I put 36/46 pressures cold in the tires as per the side sticker...

Should anything be done differently based on different widths?
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Old 09-19-2011, 02:48 PM   #2
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No matter the width of the tire, I would recommend sticking with the pressure posted on the label on your car.
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Old 09-20-2011, 06:41 PM   #3
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For someone who had 18" wheels as an option, what are the tire pressures (unloaded) indicated on you door jamb. This was not an option on my 325, maybe a 330/zhp could help me out. Thanks.
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Old 09-21-2011, 03:25 AM   #4
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Old 09-21-2011, 05:25 PM   #5
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TYVM Paraklas. That's the first time I've seen an actual placard with all those options. Searched through about 30 threads last night trying to find something similar. You da man
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