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When the time comes to replace your tires, do you find...

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
flybobbie
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When the time comes to replace your tires, do you find...

Post by flybobbie » Tue Mar 06, 2018 9:12 pm

33 psi think they would come off the rims!
Door sticker says 38F 42R RFT 18inch , but non RFT you become a test Pilot.

Got to order some rears now, got a slow puncture, the warning trigger at 38 when checked. Was reset to 42.

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Havard
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When the time comes to replace your tires, do you find...

Post by Havard » Tue Mar 06, 2018 11:24 pm

Image

I can't believe I went to the garage to confirm this. Cayman is 33 all round.

Image

Zed is 32 rear and just 30 at the front.
ImageImage

extaz
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When the time comes to replace your tires, do you find...

Post by extaz » Wed Mar 07, 2018 12:56 am

Z4Rick wrote: Sat Mar 03, 2018 6:25 pm

[/quote]

They are worn evenly, and the front shows some wear on the outside edge, but its hardly an issue and a recent alignment may have corrected that....
[/quote]

Thanks Rick that is helpful for my problem . Seems like you are doing very well especially with that much tracking. I may try the pilots as well.

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When the time comes to replace your tires, do you find...

Post by Busterboo » Wed Mar 07, 2018 8:43 pm

Havard wrote: Tue Mar 06, 2018 11:24 pm Image

I can't believe I went to the garage to confirm this. Cayman is 33 all round.

Image

Zed is 32 rear and just 30 at the front.
It's surprising people don't follow what it says on the stickers on their E89s.
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flybobbie
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When the time comes to replace your tires, do you find...

Post by flybobbie » Wed Mar 07, 2018 8:52 pm

It's surprising that the Z4 E89 pressures are much higher.

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Post by Busterboo » Wed Mar 07, 2018 11:57 pm

flybobbie wrote: Wed Mar 07, 2018 8:52 pm It's surprising that the Z4 E89 pressures are much higher.
Well said ... if I may say so. :)
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Post by Havard » Thu Mar 08, 2018 12:10 am

flybobbie wrote: Wed Mar 07, 2018 8:52 pm It's surprising that the Z4 E89 pressures are much higher.
What do the stickers say on the E89?

I assume the use of runflats has something to do with it or just a heavier car than the E85/86.

H.
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Post by Busterboo » Thu Mar 08, 2018 12:47 pm

Havard wrote: Thu Mar 08, 2018 12:10 am
flybobbie wrote: Wed Mar 07, 2018 8:52 pm It's surprising that the Z4 E89 pressures are much higher.
What do the stickers say on the E89?

I assume the use of runflats has something to do with it or just a heavier car than the E85/86.

H.
Just a heavier car.
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Nictrix
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Post by Nictrix » Thu Mar 08, 2018 5:27 pm

Busterboo wrote: Thu Mar 08, 2018 12:47 pm
Havard wrote: Thu Mar 08, 2018 12:10 am
flybobbie wrote: Wed Mar 07, 2018 8:52 pm It's surprising that the Z4 E89 pressures are much higher.
What do the stickers say on the E89?

I assume the use of runflats has something to do with it or just a heavier car than the E85/86.

H.
Just a heavier car.
Weight cant have anything to do with it.
My X6 runs lower pressures than the Z4.
Unloaded the sticker on the X6 says 2.0 bar front and 2.2 bar rear
The Z4 is 2.5 bar front and 3.0 bar rear.
I have just removed the rear tyres from our Z, GoodYears, and they have been run at the recommended pressures on the door jamb sticker for their whole lifespan. The tread wear was even right across the tread and lasted around 25,000 miles.
E89 2014 35i M Sport Black with Black leather :)

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Smartbear
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Post by Smartbear » Thu Mar 08, 2018 6:04 pm

Busterboo wrote: Thu Mar 08, 2018 12:47 pm
Havard wrote: Thu Mar 08, 2018 12:10 am
flybobbie wrote: Wed Mar 07, 2018 8:52 pm It's surprising that the Z4 E89 pressures are much higher.
What do the stickers say on the E89?

I assume the use of runflats has something to do with it or just a heavier car than the E85/86.

H.
Just a heavier car.
The 20i e89 isn’t much different in weight to a 3.0 e85 :poke:
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Post by Busterboo » Thu Mar 08, 2018 7:56 pm

QED :)
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Post by NeilMick » Fri Mar 09, 2018 1:24 pm

flybobbie wrote: Sun Mar 04, 2018 12:05 am
NeilMick wrote: Sat Mar 03, 2018 10:05 pm The inside edge is always the first to go..
On rear probably if camber not set right.
Front tyre outside edge, too much toe in. In fact both fronts wore out in 4k.
Not really, even when the camber is within spec it'll still wear on the inside edge first.
Current - F31 330i & SLK 350
Previous - E89 35is
Previous E86 3.0si

flybobbie
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When the time comes to replace your tires, do you find...

Post by flybobbie » Mon Mar 12, 2018 1:28 am

My tyres haven't worn on any edge, just slightly more on the rear centres.
So based on that thought i would go slightly lower pressure on rears down from 42 to say 40.

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