Quote:
Originally Posted by Mr. Merk
Just a Carrera on 951 8s and 930 9s
Remember what you said about the stiff sidewalls, that's going to correlate to pressures.
I was taught to check the wear line in reference to the triangles after driving hard (or competing) and adjust the tire pressure up and down to maximize the contact area.
I once set my tire pressures to stock when running R888Rs and quickly wore down the center of the rear tires and had terrible handling to the point I thought something was broken. Dropped about 10psi and all was well.
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I'm driving stock 7 and 8 and my car is heavier. Tire calculator says I would drop 2psi if I switched to 8 & 9 on my car. Right now the tires feel sticky and the turn in is so hard that I can't tell what the tires are doing. Really feels like rails but my critical mind says the limit must be close.
Quote:
Originally Posted by mark houghton
I run mine at 30 and 37 stone cold. Works fine with the OEM Fuchs on my 930 for everyday highway and twisties driving.
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Close enough. Aren't you running bigger tires than me?
But...
Question Mr. Merk raises is about this tire and its stiff sidewalls.
For autocross I can look at tire temps but for street driving my primary goal is tire life. I just don't know how to adjust pressure for a particular tire, especially because these are so sticky.
I go looking on tire companies web sites they all say to use the manufacturers numbers. No surprise because saying anything different invites a lawsuit with zero upside. The wear bars are explained but theres nothing about those triangles except that they point at the wear bars.
I'd like to understand the what and why of street tire pressure and wear - my tiny dog brain imagines its simply car weight and tire patch area so sidewall doesn't matter except when cornering. But maybe its complex stuff. Maybe its a case where everyone just 'X around and find out' and then community develops a consensus.
Will say these new tires 'handle' unbelievably well compared to anything I've had before. They have transformed the car. I guess I should play with pressure but right now I don't want to mess with a good thing.