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06-03-2023, 10:23 AM | #1 |
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Tire pressures
Hey!
So i'm planning on buying new summer tires for my e87 123 2011. I read a lot about people switching from 215/40/18 front and 245/35/18 rear to 225/40/18 front and 255/35/18 rear. Could someone tell me what would be the recommended pressures for these tires, since on the door it ofcourse says only for the 215 and 245 sizes. Thanks! |
02-10-2024, 07:57 AM | #4 |
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For what its worth, I run 40psi front and rear.
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02-11-2024, 04:32 AM | #5 |
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Interesting, would've expected a little different pressures due to staggered stance. Not noticing any extra wear on the sides or the middle of the tires?
Gonna also give this a try when its time to put the summers back on |
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02-11-2024, 07:18 AM | #6 |
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Drives: 08 135 6MT vert
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It’s my daily driver and I get about 20k+ miles on the rears and 35k+ on the fronts (PS4S). NEVER rebalance and they wear “evenly” (other than the minor camber effect on the inside edge). Stock suspension replaced with Koni Yellows about 40k miles ago.
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02-11-2024, 08:47 AM | #7 |
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Tire pressure on the placard is a starting-point and a cover-your-ass legal document for the vehicle manufacturer. Tire pressure should always be adjusted to taste, just like seat and steering wheel position.
The Basics: To decrease Oversteer *Lower front tire pressure *Raise rear tire pressure To decrease Understeer *Raise front tire pressure *Lower rear tire pressure |
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02-11-2024, 09:49 AM | #8 |
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Normally i would look at the placard, but since i oversized my tires from 215 front to 225 and rear 245 to 255, they don't have any numbers to go by. So i tried to look for something like a 3 series with similar weight and people with 135i/140i to get a good baseline to what people go for, then just tuning from there.
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02-11-2024, 09:51 AM | #9 |
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Gonna definitely give a try on the 40/40, im using the bridgestone truanza 6.
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