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3.0 ltre with uniroyal rain sport 3

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
TONYL
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3.0 ltre with uniroyal rain sport 3

Post by TONYL » Mon Aug 07, 2017 7:14 pm

Hi all
What tyre presures should i be running on these?
Feels a bit unstable at the back..especially in windy conditions
Any experiances
Thanks
Tony
318ci m sport coupe
3.0i z4 e89

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mr wilks
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3.0 ltre with uniroyal rain sport 3

Post by mr wilks » Mon Aug 07, 2017 7:22 pm

TONYL wrote: Mon Aug 07, 2017 7:14 pm Hi all
What tyre presures should i be running on these?
Feels a bit unstable at the back..especially in windy conditions
Any experiances
Thanks
Tony
The Si roadster i'm currently running has Mv2s with a matching set of almost new UniRainsport3s fitted , current pressures 33 front 35 rear & it never quivers & corners like a ///M :oops: :driving:
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Smartbear
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3.0 ltre with uniroyal rain sport 3

Post by Smartbear » Mon Aug 07, 2017 7:27 pm

I ran my non runflats on runflat pressures for a short while & it was all over the place, wandering on motorways and needed constant steering corrections, let several psi out (courtesy of stupot) and it's a different car :thumbsup:
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...
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3.0 ltre with uniroyal rain sport 3

Post by benv6 » Mon Aug 07, 2017 7:49 pm

I am running my non runflats on runflat pressures and all seems fine !! Have I missed anything ?
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benv6
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3.0 ltre with uniroyal rain sport 3

Post by benv6 » Mon Aug 07, 2017 7:50 pm

Smartbear wrote: Mon Aug 07, 2017 7:27 pm I ran my non runflats on runflat pressures for a short while & it was all over the place, wandering on motorways and needed constant steering corrections, let several psi out (courtesy of stupot) and it's a different car :thumbsup:
Rob
What pressure and sizes are you running ?
Now: BMW 335D Touring
Previous: 435D Coupe, BMW Z4 E89 35i, BMW Z4 E85 2.0, BMW E46 330CI

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Smartbear
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3.0 ltre with uniroyal rain sport 3

Post by Smartbear » Mon Aug 07, 2017 8:44 pm

benv6 wrote: Mon Aug 07, 2017 7:50 pm
Smartbear wrote: Mon Aug 07, 2017 7:27 pm I ran my non runflats on runflat pressures for a short while & it was all over the place, wandering on motorways and needed constant steering corrections, let several psi out (courtesy of stupot) and it's a different car :thumbsup:
Rob
What pressure and sizes are you running ?
I've got 19's in 225/255 & now run 32f 35r, it's much more stable-I think the higher pressure just left a central band in the middle taking the load :cry:
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

TONYL
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3.0 ltre with uniroyal rain sport 3

Post by TONYL » Mon Aug 07, 2017 10:01 pm

Hi
18 inch rims
2.5 F and 2.8R
318ci m sport coupe
3.0i z4 e89

TONYL
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3.0 ltre with uniroyal rain sport 3

Post by TONYL » Mon Aug 07, 2017 10:01 pm

They are non run flats
318ci m sport coupe
3.0i z4 e89

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3.0 ltre with uniroyal rain sport 3

Post by Busterboo » Mon Aug 07, 2017 10:04 pm

benv6 wrote: Mon Aug 07, 2017 7:49 pm I am running my non runflats on runflat pressures and all seems fine !! Have I missed anything ?
No, you're just doing it right. :)
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3.0 ltre with uniroyal rain sport 3

Post by Busterboo » Mon Aug 07, 2017 10:11 pm

Smartbear wrote: Mon Aug 07, 2017 8:44 pm I've got 19's in 225/255 & now run 32f 35r
Rob
"35r" That seems quite low. How many % off BMW's recommended pressure for your model is it, Rob?
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3.0 ltre with uniroyal rain sport 3

Post by Smartbear » Mon Aug 07, 2017 10:36 pm

Busterboo wrote: Mon Aug 07, 2017 10:11 pm
Smartbear wrote: Mon Aug 07, 2017 8:44 pm I've got 19's in 225/255 & now run 32f 35r
Rob
"35r" That seems quite low. How many % off BMW's recommended pressure for your model is it, Rob?
45psi is recommended for the runflats from memory. as I said the car was skating round corners & lighting up the tyres in second out of slow turns :o
Rob
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e89 Sdrive 30i, this ones busted, pass me another...
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3.0 ltre with uniroyal rain sport 3

Post by Pastry » Mon Aug 07, 2017 10:47 pm

I had RS3,s on my 3.0i msport E89 and found 36r 34f suited me best
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3.0 ltre with uniroyal rain sport 3

Post by Busterboo » Mon Aug 07, 2017 10:50 pm

A reduction in your rear tyre pressures of 10 - one zero - TEN - psi seems a lot, Rob. :dizzy:
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3.0 ltre with uniroyal rain sport 3

Post by Smartbear » Mon Aug 07, 2017 11:04 pm

Busterboo wrote: Mon Aug 07, 2017 10:50 pm A reduction in your rear tyre pressures of 10 - one zero - TEN - psi seems a lot, Rob. :dizzy:
It is a lot, definitely feels better for it imho though :driving:
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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3.0 ltre with uniroyal rain sport 3

Post by Busterboo » Tue Aug 08, 2017 10:23 am

Good. I'm glad you're happy with the set-up, re-map and all. :)
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