What's the best psi to run for the most life out the tyres
Many thanks Paul
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20" alloys
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g60renshaw
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20" alloys
I am running about 28 psi on the rear but that is on non run flats. They sit nice and flat on the ground like that.
If you are running runflats the pressure will make little difference to the life.
If you are running runflats the pressure will make little difference to the life.
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wilkoturbo
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g60renshaw
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20" alloys
Yep. If the pressure is too high it will just run on the inside edge of the tyre. 28 means the wear is spread evenly across the tyre.
Re: 20
High tyre pressure causes the tyre to wear in the centre, not the inside edge. Inside edge wear comes from incorrectly set up wheel alignment, OR underinflated tyres! Underinflating your tyres causes more body roll and also puts more stress on the wall of the tyre, causes more flex and thus more wear.
Always follows manufacturers recommended tyre pressures, they're tried and tested in conjunction with the tyre manufacturers!
For info ALL X5's should have a minimum of 32 psi in the front and rear tyres! increasing to 39 psi in the read for a fully loaded car.
if you want to lower the pressure to get out of mud/sand etc.. then drop them down to 15psi or something, but increase the pressure when you become unstuck.
Always follows manufacturers recommended tyre pressures, they're tried and tested in conjunction with the tyre manufacturers!
For info ALL X5's should have a minimum of 32 psi in the front and rear tyres! increasing to 39 psi in the read for a fully loaded car.
if you want to lower the pressure to get out of mud/sand etc.. then drop them down to 15psi or something, but increase the pressure when you become unstuck.
Current: E53 Facelift 3.0d Sport Exclusive, Sterling Grey/Black Nappa Leather, comms, 20"'s, heated steering wheel :p just remapped by Jason @BW Chiptune.
(Previous X5 4.4i Sport, Black/Black, comms, 20" 168's)
Also: E31 840Ci
Previous: 911, M5, 540, RR, 30ish BMW's
(Previous X5 4.4i Sport, Black/Black, comms, 20" 168's)
Also: E31 840Ci
Previous: 911, M5, 540, RR, 30ish BMW's
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g60renshaw
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- Posts: 162
- Joined: Mon Sep 27, 2010 1:13 pm
Re: 20
I agree completely that "under inflating" a tyre is not the way to go, however a couple of PSI is very different and the pressures are likely to fluctuate more than this on a long journey.
Mine is actually 30 psi, I was remembering my old golf which ran 28 PSI in the rear, but either way its still minor.
If the wear was caused by under inflation alone it would be on both the inside and outside edge of the tyre and not just the inside as seen on the vast majority of X5s and many BMW's.
The geometry settings of the X5 from factory (which mine has recently been checked against) have quite an agressive level of camber and toe which contributes to the X's good handling for such a large car. This however means the tyre is running at an angle and when exagerated by a stiff sidewall or high pressure in the tyre causes it to wear more on the inside edge.
Some companies like Wheels in motion ( http://www.wheels-inmotion.co.uk/forum/ ... topic=6572 ) favour a correction of the camber and toe settings to eliminate this, where others have had success with a slight drop in tyre pressure to increase the contact patch and spread this load.
Jay
Mine is actually 30 psi, I was remembering my old golf which ran 28 PSI in the rear, but either way its still minor.
If the wear was caused by under inflation alone it would be on both the inside and outside edge of the tyre and not just the inside as seen on the vast majority of X5s and many BMW's.
The geometry settings of the X5 from factory (which mine has recently been checked against) have quite an agressive level of camber and toe which contributes to the X's good handling for such a large car. This however means the tyre is running at an angle and when exagerated by a stiff sidewall or high pressure in the tyre causes it to wear more on the inside edge.
Some companies like Wheels in motion ( http://www.wheels-inmotion.co.uk/forum/ ... topic=6572 ) favour a correction of the camber and toe settings to eliminate this, where others have had success with a slight drop in tyre pressure to increase the contact patch and spread this load.
Jay