Optimium tyre pressure F10 on 19"

[Welshbeef]

I keep playing round with the pressure trying to get the perfect set up on my F10 but can never seem to get it right.

Too low it' wobbles in corners and gives zero confidence
Too hard it's crashy and the tears seems to bounce more/axle tramp when on the accelerator hard
Middle just cannot get it right.

Also the split front to rear.

Would appreciate input from others.

[drmark]

I always ran mine as per the manual. Seemed perfect to me.
On a different note I have just done the reverse of your move and traded my BMW for a RS6. It's not run in yet, but what a car? After years of powerful diesels I finally get the petrol big estate thing - mind you the RS is hardly typical

[Welshbeef]

http://www.puretyre.co.uk/bmw-5-series-tyre-pressu...

Looking at this im confused is it 2.2 front and 2.7 rear for 19"?

[Monty Python]

Unless you find someone with the same tyres, any figures you get won't be "perfect".

[Welshbeef]

Monty Python said:

Unless you find someone with the same tyres, any figures you get won't be "perfect".

Michellin Pilot sport run flats OEM tyre.

[Monty Python]

What have you tried so far?

[Welshbeef]

Monty Python said:

What have you tried so far?

Currently I'm trying out 2.7 & 3.1

[E30M3SE]

What does the tyre pressure label in the drivers door shut say?

[Jobbo]

Welshbeef said:

http://www.puretyre.co.uk/bmw-5-series-tyre-pressu...

Looking at this im confused is it 2.2 front and 2.7 rear for 19"?

Looks like 2.2 front, 2.3 rear to me - you're on the 275 section rears I assume?

I have to say they are the most ludicrously complicated labels on any car. I saw a discussion about them on a BMW forum where somebody was saying they were logical because they grouped together tyres which have the same pressure. Personally, I'd rather they showed the tyre size options clearly even if it meant duplicating the text for the pressure.

[Welshbeef]

Jobbo said:

Looks like 2.2 front, 2.3 rear to me - you're on the 275 section rears I assume?

I have to say they are the most ludicrously complicated labels on any car. I saw a discussion about them on a BMW forum where somebody was saying they were logical because they grouped together tyres which have the same pressure. Personally, I'd rather they showed the tyre size options clearly even if it meant duplicating the text for the pressure.

Yes - tennis court rollers in the rear


I couldn't make head nor tail of it.

2.2 & 2.3 it is then.

[philmots]

From my experience the online tyre pressure guides are always wrong.

What does the sticker on your door frame say? 2.2 and 2.3 sound far far far too short of ideal. For reference my E61 requires 2.5 and 3.0 front/back. All BMW I've had have taken similar high pressures.

The sticker is what BMW recommend, I've never felt any benefit of using anything else.

[philmots]

Put a photo up of the sticker and I'll see how i make it out.

You're doing them from cold too, yeah?

[Jobbo]

From Beefy's link, that is a photo of the sticker:



It's consistent with the sticker in this thread elsewhere too: http://f10.5post.com/forums/showthread.php?t=11026...

[Welshbeef]

philmots said:

Put a photo up of the sticker and I'll see how i make it out.

You're doing them from cold too, yeah?

Issue I had

[nickfrog]

I would ditch the run flats in the first place.

[Welshbeef]

nickfrog said:

I would ditch the run flats in the first place.

Given they have 6mm and are only a year old Michelin Pilot sport 2 which according to the BMW invoice which came with the car cost in the region of £1.1-1.2k. I'll be keeping them until they are work out which at current wear rate will be a further 2+ years.

[nickfrog]

2nd hand RFTs fetch good money on ebay IME and non-RFTs are cheaper (particularly when sourced properly, ie not from a BMW dealer) and will transform the way the car handles. It's like an almost no-cost upgrade if you like.

Edited by nickfrog on Thursday 8th October 07:43

[Jobbo]

I'm doubtful whether I'll bother to change to non-RFTs when my tyres need replacing. I did so on my previous E61s but there just doesn't seem to be a point now; they're about £10 a tyre more expensive for RFTs and the comfort levels are fine. The inconvenience of not having a spare wheel if I get a puncture (and there's no space even for a space-saver in the F11) is worth £40 every 18 months or so.

[nickfrog]

You really don't do it for the money anyway, but if you can't perceive the benefits then you're better off with the RFTs what with the convenience.

[Monty Python]

Jobbo said:

I'm doubtful whether I'll bother to change to non-RFTs when my tyres need replacing. I did so on my previous E61s but there just doesn't seem to be a point now; they're about £10 a tyre more expensive for RFTs and the comfort levels are fine. The inconvenience of not having a spare wheel if I get a puncture (and there's no space even for a space-saver in the F11) is worth £40 every 18 months or so.

If the difference is only £10 you're paying far too much for normal tyres. BC have the 255/35/18 Michelin PS2 ZP run flat at £194 while the PS3 normal tyre is only £129, and it's much the same for others too (P Zero RF - £191, normal - £129).