Tyre Pressure for 245/40 - 18"
04-07-2006, 02:22 PM
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I just want to confirm with the majority here..... according to my driver's side label the reccomended Tyre Pressure for 245/40 - 18" is 2.4 front and 2.8 rear.
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now
all goes straight to the car now 
all non RF's of course
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now
all goes straight to the car now all non RF's of course
04-07-2006, 03:09 PM
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Originally Posted by Peter530i' post='266141' date='Apr 7 2006, 11:22 PM
I just want to confirm with the majority here..... according to my driver's side label the reccomended Tyre Pressure for 245/40 - 18" is 2.4 front and 2.8 rear.
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now all goes straight to the car now
all non RF's of course
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now
all goes straight to the car now all non RF's of course
For the road, figures above (2.4 and 2.8) sound about right. I'll check tomorrow and confirm. You could try lowering them very slightly, but not by too much.
04-08-2006, 05:53 AM
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Originally Posted by SG535d' post='266161' date='Apr 8 2006, 12:09 AM
For the track I start with 2.8 bar all round
For the road, figures above (2.4 and 2.8) sound about right. I'll check tomorrow and confirm. You could try lowering them very slightly, but not by too much.
For the road, figures above (2.4 and 2.8) sound about right. I'll check tomorrow and confirm. You could try lowering them very slightly, but not by too much.
If I am going to give it some I will put 2.6 up front and 2.8/9 in the rear, but for everyday driving I have 2.2F and 2.7R, that is what is on my sticker for the 245/40/18's.
04-08-2006, 08:20 AM
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Originally Posted by Peter530i' post='266141' date='Apr 8 2006, 12:22 AM
I just want to confirm with the majority here..... according to my driver's side label the reccomended Tyre Pressure for 245/40 - 18" is 2.4 front and 2.8 rear.
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now all goes straight to the car now
all non RF's of course
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now
all goes straight to the car now all non RF's of course
18" 245/40 figures are 2.2 front 2.6 rear ( again 4 pax max ) as per BMW.
04-08-2006, 10:27 AM
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[color=red]Mods:[/color]
[color=blue]M tech sport steering wheel with M5 SMG paddles working retrofit done !
Trunk lid opening button retrofit done.[/color]
[color=blue]3M window 35% tint done
Chrome grilles
E60.net Clings
[/color]
Originally Posted by andy545' post='266395' date='Apr 8 2006, 11:20 AM
Peter, the figures you mention are valid for our 17" winter setup ( 4 pax max ).
18" 245/40 figures are 2.2 front 2.6 rear ( again 4 pax max ) as per BMW.
18" 245/40 figures are 2.2 front 2.6 rear ( again 4 pax max ) as per BMW.
the number you are mentioning are actually for 17"
my sticker says 2.4 and 2.8.....for 18"
I'll take a pic later
04-08-2006, 10:37 AM
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Originally Posted by Peter530i' post='266141' date='Apr 7 2006, 04:22 PM
I just want to confirm with the majority here..... according to my driver's side label the reccomended Tyre Pressure for 245/40 - 18" is 2.4 front and 2.8 rear.
Correct?
Correct?
04-08-2006, 10:41 AM
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My Ride: 2004 BMW 530I steptronic, Orient Blue, Dakota Black Leather, Finishers Aluminium with Wave Cutting interior, NAVIgation, Radio PROFESSIONAL, CD in-dash, Hi-Fi extended sound system, PDC system, Bi-Xenons lights with washers, cruise-control, heated seats, Extended AC, auto"shade" mirrors, auto lights sensors, rain/wiper sensor, M-tech leather multifunction steering wheel, side airbags rearseats, sliding armrest, smoker's package (I don't smoke!), velour floor mats, spare wheel and jack, 122 style rims winter setup, M135 style rims summer setup
[color=red]Mods:[/color]
[color=blue]M tech sport steering wheel with M5 SMG paddles working retrofit done !
Trunk lid opening button retrofit done.[/color]
[color=blue]3M window 35% tint done
Chrome grilles
E60.net Clings
[/color]
ok here is the pics of my tyre pressure sticker
see 245 40 18 93W = 2.4front 2.8 rear
(click to enlarge for better quality)
see 245 40 18 93W = 2.4front 2.8 rear
(click to enlarge for better quality)
04-08-2006, 10:56 AM
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Originally Posted by Peter530i' post='266141' date='Apr 8 2006, 01:22 AM
I just want to confirm with the majority here..... according to my driver's side label the reccomended Tyre Pressure for 245/40 - 18" is 2.4 front and 2.8 rear.
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now all goes straight to the car now
all non RF's of course
Correct?
After changing from my winter 17" the ride is significantly harder and harsh..... there is no rubber to obsorbe the pot holes now
all goes straight to the car now all non RF's of course
Check the pressures once a month!
And when you check be sure that the tires are not hot,
after long driving etc.
Also the air temperature makes a big differance,
the colder it is the lower the pressure.
04-08-2006, 11:03 AM
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My Ride: 2004 BMW 530I steptronic, Orient Blue, Dakota Black Leather, Finishers Aluminium with Wave Cutting interior, NAVIgation, Radio PROFESSIONAL, CD in-dash, Hi-Fi extended sound system, PDC system, Bi-Xenons lights with washers, cruise-control, heated seats, Extended AC, auto"shade" mirrors, auto lights sensors, rain/wiper sensor, M-tech leather multifunction steering wheel, side airbags rearseats, sliding armrest, smoker's package (I don't smoke!), velour floor mats, spare wheel and jack, 122 style rims winter setup, M135 style rims summer setup
[color=red]Mods:[/color]
[color=blue]M tech sport steering wheel with M5 SMG paddles working retrofit done !
Trunk lid opening button retrofit done.[/color]
[color=blue]3M window 35% tint done
Chrome grilles
E60.net Clings
[/color]
Originally Posted by Ricracing' post='266457' date='Apr 8 2006, 01:56 PM
Also the air temperature makes a big differance,
the colder it is the lower the pressure.
the colder it is the lower the pressure.
04-08-2006, 11:10 AM
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Originally Posted by SG535d' post='266161' date='Apr 8 2006, 02:09 AM
For the track I start with 2.8 bar all round
For the road, figures above (2.4 and 2.8) sound about right. I'll check tomorrow and confirm. You could try lowering them very slightly, but not by too much.
For the road, figures above (2.4 and 2.8) sound about right. I'll check tomorrow and confirm. You could try lowering them very slightly, but not by too much.