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Tire pressure for non-run flats?

Alloy wheels and tyre discussion
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KenSmith
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Tire pressure for non-run flats?

Post by KenSmith » Wed Oct 29, 2014 5:10 pm

I replaced my run flats with Michelin Pilot Super Sports. Should I use the factory air pressure for the non-run flats or maybe less? Thanks!
2006 Z4 3.0si
Rocklin, CA. USA

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Swiftly
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Re: Tire pressure for non-run flats?

Post by Swiftly » Wed Oct 29, 2014 5:14 pm

There are various threads on this if you search with varying pressures being used depending on the size of tyre that you have fitted.

I have a roadster with 18" tyres fitted and have 30psi front and 34psi rear, I did try previously 28psi front and 32psi rear but didn't feel quite right though :thumbsup:
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KenSmith
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Re: Tire pressure for non-run flats?

Post by KenSmith » Wed Oct 29, 2014 11:11 pm

I have the 3.0si and 17" wheels. I put 33 in front and 38 in rear (based on the tire sticker on the door pillar).
2006 Z4 3.0si
Rocklin, CA. USA

paulgs1000
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Re: Tire pressure for non-run flats?

Post by paulgs1000 » Wed Oct 29, 2014 11:57 pm

Is that with non run-flats Ken?

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Smartbear
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Re: Tire pressure for non-run flats?

Post by Smartbear » Thu Oct 30, 2014 5:47 am

I've got an si with 18inch wheels & use 34front 38rear-I've gone up on pressure as it felt "squidgy" (technical term) on the standard run flat pressures.
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KenSmith
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Re: Tire pressure for non-run flats?

Post by KenSmith » Thu Oct 30, 2014 4:26 pm

paulgs1000 wrote:Is that with non run-flats Ken?

:driving: :thumbsup:
Yes, non run-flats. Michelin Pilot Super Sports.
2006 Z4 3.0si
Rocklin, CA. USA

Geezah
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Re: Tire pressure for non-run flats?

Post by Geezah » Thu Oct 30, 2014 11:10 pm

Stick with the tyre pressures on the pillar. Apparently it makes no difference. The figures apply to both types of tyres.
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Re: Tire pressure for non-run flats?

Post by KenSmith » Fri Oct 31, 2014 4:39 pm

Geezah wrote:Stick with the tyre pressures on the pillar. Apparently it makes no difference. The figures apply to both types of tyres.
Agree, I emailed TireRack and they also told me to use the pressure ratings on the door pillar regardless of type of tire. Thanks! :thumbsup:
2006 Z4 3.0si
Rocklin, CA. USA

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AlanJ
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Re: Tire pressure for non-run flats?

Post by AlanJ » Fri Oct 31, 2014 6:13 pm

Geezah wrote:Stick with the tyre pressures on the pillar. Apparently it makes no difference. The figures apply to both types of tyres.
x2
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thepits
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Re: Tire pressure for non-run flats?

Post by thepits » Fri Oct 31, 2014 6:55 pm

AlanJ wrote:
Geezah wrote:Stick with the tyre pressures on the pillar. Apparently it makes no difference. The figures apply to both types of tyres.
x2
There are numerous threads, on numerous forums, on the right tyre pressures to use, and at the end of the day, provided you stick within the legal limits, it's down to personal preference. :driving:
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Re: Tire pressure for non-run flats?

Post by Smartbear » Fri Oct 31, 2014 7:12 pm

Tried my non run flats at recommended pressures & it felt like it was running on jelly tires :(
Upped the pressures & it feels good and precise.
Regards
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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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