M5 tyre pressures

[futie]

Hi all, just wondered what tyre pressures any fellow M5 owners (E39) run?

I've got Pzero rossos on mine and have noticed the rears wearing quite a lot in the centre of the tread, so I thought I must have the pressures too high. Quite the opposite, infact - they were at 2.4psi instead of the recommended 2.6

Not sure what to do, really - i'm not that fussed about the effect on handling (not particularly over-qualified to notice that sort of thing!) but would certainly like to extend the life of the tyres a little!

ps. inner & outer edges have plenty of tread left, so I assume it's not a tracking problem?

pps. changed another rear anti-roll bar bracket this afternoon .. good job they're only £1 from a dealer!

[futie]

Anyone?

[agent006]

If they're wearing in the middle, definitely take the pressures down a little. Bearing in mind that whatever you've got on there at the moment may behave differently to the tyres that BMW derived the pressures from.

[juliann]

futie said:

Hi all, just wondered what tyre pressures any fellow M5 owners (E39) run? I've got Pzero rossos on mine and have noticed the rears wearing quite a lot in the centre of the tread, so I thought I must have the pressures too high. Quite the opposite, infact - they were at 2.4psi instead of the recommended 2.6 Not sure what to do, really - i'm not that fussed about the effect on handling (not particularly over-qualified to notice that sort of thing!) but would certainly like to extend the life of the tyres a little! ps. inner & outer edges have plenty of tread left, so I assume it's not a tracking problem? pps. changed another rear anti-roll bar bracket this afternoon .. good job they're only £1 from a dealer!

I'm assuming you mean 2.4 / 2.6 Bar not PSI
2.4 bar is 34.8 PSI. I found running the rears at 32 PSI (2.2 bar)cold was the best wear/grip solution.

[futie]

juliann said:

I'm assuming you mean 2.4 / 2.6 Bar not PSI 2.4 bar is 34.8 PSI. I found running the rears at 32 PSI (2.2 bar)cold was the best wear/grip solution.

Hmmm - that's interesting, Julian - 32psi sounds like an awful lot lower than recommended, but it's the sort of pressure which looks right for my tyres - i'll give it a go.

Thanks!