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Winter tyre pressures

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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The_Dude
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Winter tyre pressures

Post by The_Dude » Sun Nov 09, 2014 1:00 pm

Hi all

Just put my winters on ready for the deluge that not doubt won't arrive, but was wondering what pressures to use. They're 225/45/17 non run flats on an msport with standard suspension (though the extra comfort might justify the lowering springs now).

At the moment I've followed the 2.9/2.4 bar rear and front as per the sticker but these give what appear to be an awfully large psi of around 42/35. That seems rather high for car tyres.

Oh and Mr wills the 5 series wheels look rather good. I think the et brings them out slightly and makes it look rather mean. Thanks
E89 23i M Sport, Saphire Black, Canberra Beige Leather.
Mods: De-badged, blue callipers, gloss black LCI's and roll over hoops, black performance grills, stubby aerial, rear carbon diffuser, gunmetal powdercoated alloys, custom stainless cat back exhaust.

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mr wilks
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Re: Winter tyre pressures

Post by mr wilks » Sun Nov 09, 2014 1:06 pm

Get some pics up mate :) pressure sounds waaaaaaaaaaaay over :o would have thought 32/34psi or thereabouts would be nearer the mark :thumbsup:
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TitanTim
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Re: Winter tyre pressures

Post by TitanTim » Sun Nov 09, 2014 1:28 pm

The tyre pressure may be stamped on the tyres sidewall.

I use 32psi front and rear on my Z3 which is wearing 225/40 R18.

Tim.
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The_Dude
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Re: Winter tyre pressures

Post by The_Dude » Sun Nov 09, 2014 1:46 pm

Cheers Mr WIlks, i'm currently sorting a photobucket account, which i should've sorted when i joined as i've yet to produce the obligatory "this is my car" post. Will add some on there, though due to the appalling weather, they're not going to be the cleanest of shots!

Will have a look around for pressure, buts thats pretty much what i thought, around the 32/34psi range.
E89 23i M Sport, Saphire Black, Canberra Beige Leather.
Mods: De-badged, blue callipers, gloss black LCI's and roll over hoops, black performance grills, stubby aerial, rear carbon diffuser, gunmetal powdercoated alloys, custom stainless cat back exhaust.

The_Dude
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Re: Winter tyre pressures

Post by The_Dude » Sun Nov 09, 2014 1:59 pm

Image

Image

Here you go, hopefully this worked. The suspension needs to settle a little......or get lowered mwah ha haaa
E89 23i M Sport, Saphire Black, Canberra Beige Leather.
Mods: De-badged, blue callipers, gloss black LCI's and roll over hoops, black performance grills, stubby aerial, rear carbon diffuser, gunmetal powdercoated alloys, custom stainless cat back exhaust.

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mr wilks
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Re: Winter tyre pressures

Post by mr wilks » Sun Nov 09, 2014 2:03 pm

Looks bang on with the 17s + lower offset :thumbsup:
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sars
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Re: Winter tyre pressures

Post by sars » Sun Nov 09, 2014 2:05 pm

I would suggest a few Psi more than those indicated by BMW for that tyre size to account for them being non-RFT's, however a few psi either way will not do the tyres harm just wear, the best is to see what you prefer, comfy ride or better turn in.

The pressure indicated on the side wall is the MAWP of the tyre not what it's supposed to run at, as that is dependant on the vehicle and its mass

oh and nice wheels :thumbsup:
Gorgeous SFR Z4 M40i 8)
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible

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Re: Winter tyre pressures

Post by The_Dude » Sun Nov 09, 2014 2:10 pm

Cheers, i think the 5 series alloys look really good, the head on doesn't really do them justice. Im thinking of getting some 10mm spacers for when the 18's go back on after winter to keep the stance.

Will drop the pressures to 32/34ish and see how it goes.
E89 23i M Sport, Saphire Black, Canberra Beige Leather.
Mods: De-badged, blue callipers, gloss black LCI's and roll over hoops, black performance grills, stubby aerial, rear carbon diffuser, gunmetal powdercoated alloys, custom stainless cat back exhaust.

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Re: Winter tyre pressures

Post by Angie4m » Mon Nov 10, 2014 11:52 pm

Well if I do decide I need winter wheels I should be sorted. My dads got a few sets of these wheels in the garage which I keep meaning to dispose of. Might hold off just incase :thumbsup:
Deep Sea Blue sDrive35is - I LOVE IT! Best car I've ever owned :) - Gone
RRS V8 Supercharged - Gone
Abarth 595 Competizione - Gone
Yas Marina Blue M4 Coupe - Gone

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Re: Winter tyre pressures

Post by sars » Tue Nov 11, 2014 12:04 am

Angie4m,

This is the best advert for winter tyres on the zed that I can think of, posted a few times but it brings back happy memories of my daughters first sledging expidition made possible by Falken winter tyres. The car is on a pretty steep hill, 50 yards up a Range Rover got stuck.

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Gorgeous SFR Z4 M40i 8)
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible

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Re: Winter tyre pressures

Post by ronk » Tue Nov 11, 2014 12:11 am

Angie4m wrote:Well if I do decide I need winter wheels I should be sorted. My dads got a few sets of these wheels in the garage which I keep meaning to dispose of. Might hold off just incase :thumbsup:
Winters, just do it !

There are plenty who have said they are not necessary but how many winter tyre users have said they wouldn't bother again?
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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Re: Winter tyre pressures

Post by ronk » Tue Nov 11, 2014 12:17 am

sars wrote:Angie4m,

This is the best advert for winter tyres on the zed that I can think of, posted a few times but it brings back happy memories of my daughters first sledging expidition made possible by Falken winter tyres. The car is on a pretty steep hill, 50 yards up a Range Rover got stuck.

Image
That sums it up nicely !
We see the opposite of this on the TV when the UK slithers to a halt with a dusting of 20mm of snow !
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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Angie4m
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Re: Winter tyre pressures

Post by Angie4m » Tue Nov 11, 2014 12:32 am

ronk wrote:
Angie4m wrote:Well if I do decide I need winter wheels I should be sorted. My dads got a few sets of these wheels in the garage which I keep meaning to dispose of. Might hold off just incase :thumbsup:
Winters, just do it !

There are plenty who have said they are not necessary but how many winter tyre users have said they wouldn't bother again?
I'm lucky that the GTR is 4WD and has winters, just need it back. If I need to go somewhere with the car and know in advanced I'll put a set on.

The cars done a whole 150 miles since I returned from Silverstone so quite a bit of effort when the car might not move at all. It may just live under its cover that I bought for it. But good to know I've got the option.
Deep Sea Blue sDrive35is - I LOVE IT! Best car I've ever owned :) - Gone
RRS V8 Supercharged - Gone
Abarth 595 Competizione - Gone
Yas Marina Blue M4 Coupe - Gone

Current:
Protonic Blue i8
Amethyst 997
F56 JCW Challenge (19 of 52)

Still Shy and retiring

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ronk
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Re: Winter tyre pressures

Post by ronk » Tue Nov 11, 2014 12:45 am

4wd is only better to get you moving.
(I note the GTR has winters)

It really doesn't do anything much to help steer of stop!
I look at it as , if you can't get moving then your not going to crash Into anybody or anything!

We have a ski slope of a hill towards our estate and it cannot be used to get home without winter tyres. I've seen cars inc 4wd, with all wheels locked like toboggans on winters nights!

The owner of a hotel we stayed at in Chiavenna wouldnt use his range rover sport in the snow (std Pirelli? Rubber)
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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