18" run flat tires

Lotus99 · 04-19-2009, 12:34 AM

I have the OEM tires (Bridgestone Potenza RE050A RFT) on my 335i w/18'' rims, w/Sport Package. Sticker says 36 psi Front and 39 psi Back.

What are you guys mostly running?

GregL · 04-19-2009, 12:36 AM

For stock RFTs I find it's best to follow BMW's recommendation as per the tire placard. For non-RFT then it's a different story.

Andy M · 04-19-2009, 12:58 AM

Quote:

Originally Posted by GregL

For stock RFTs I find it's best to follow BMW's recommendation as per the tire placard. For non-RFT then it's a different story.

+1

Just swapped to my summers today. 36 psi front, 39 psi rear.

VanM3Lover · 04-19-2009, 02:03 AM

36F and 39R

Oulixes · 04-19-2009, 07:37 AM

Quote:

Originally Posted by Lotus99

I have the OEM tires (Bridgestone Potenza RE050A RFT) on my 335i w/18'' rims, w/Sport Package. Sticker says 36 psi Front and 39 psi Back.

What are you guys mostly running?

On a 330xi I have 17" rims, Continental Contact SRT tires, 32 psi F, 35 psi R.

Spydeputy · 04-19-2009, 07:40 AM

ditto !

John 070 · 04-19-2009, 07:45 AM

Quote:

Originally Posted by Oulixes

On a 330xi I have 17" rims, Continental Contact SRT tires, 32 psi F, 35 psi R.

Exactly what I do as well, 35R/32F. I don't see the need to go higher as some have suggested. That probably causes premature wear in the center and poor handling.

04-19-2009, 10:06 PM

Anyone Care to fill in what the recommended pressures are?

Lotus99 · 04-19-2009, 10:38 PM

Quote:

Originally Posted by index1489

Anyone Care to fill in what the recommended pressures are?

They are what I mentioned in my post. What I meant by "sticker" is the sticker inside the driver's door, which shows the pressures depending on the type of tire you're running.

Lotus99 · 04-19-2009, 10:40 PM

Quote:

Originally Posted by GregL

For stock RFTs I find it's best to follow BMW's recommendation as per the tire placard. For non-RFT then it's a different story.

Thanks. On my old Audi A4, IIRC everyone was running their fronts higher than the recommended PSI, which I think had to do with the car's tendency to understeer, that's why I asked in real life what people did.

Mahhvinn · 04-20-2009, 03:05 AM

i run the BMW recommended pressure for my stock rft's

Gesler · 04-20-2009, 04:46 PM

For stock RFTs (Bridgestone Potenza), the manual says 32 front and 38 rear for speeds upto 100mph.

Vicious · 04-28-2015, 10:16 PM

I just got my E90 last Friday.

I've noticed a second sticker, that says for speeds over 100mph, run your tires (i have a 2010 e90 335i w/M-Sport 18's) at 39 front/46 rear.

Anyone doing this, or running higher than the below 100mph 36/39? That seems insanely high, but this is my first experience with Run Flats.

04-19-2009, 12:34 AM	#1
Lotus99 Colonel 628 Rep 2,808 Posts Drives: 19 M2C & 18 X3 M40i Join Date: Jul 2007 Location: Canada iTrader: (1)	18" run flat tires - what tire pressures are you running? I have the OEM tires (Bridgestone Potenza RE050A RFT) on my 335i w/18'' rims, w/Sport Package. Sticker says 36 psi Front and 39 psi Back. What are you guys mostly running?
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04-19-2009, 12:36 AM	#2
GregL Brigadier General 98 Rep 3,618 Posts Drives: 2016 CLA45 AMG Join Date: Nov 2005 Location: GTA iTrader: (4)	For stock RFTs I find it's best to follow BMW's recommendation as per the tire placard. For non-RFT then it's a different story. __________________ 2016 Mercedes-AMG CLA45 2013 Mercedes-Benz B250 - Gone 2010 Mercedes-Benz C350 4Matic - Gone 2006 BMW 330xi - Gone 2001 Infiniti QX4 - Gone
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04-19-2009, 02:03 AM	#4
VanM3Lover First Lieutenant 20 Rep 394 Posts Drives: 4.0 V8 Join Date: Jan 2009 Location: Van iTrader: (0)	36F and 39R
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04-19-2009, 07:40 AM	#6
Spydeputy Brigadier General 205 Rep 3,523 Posts Drives: 2015 F23 M235i/2008,E90,335xi Join Date: Aug 2008 Location: The County, Maryland iTrader: (19) Garage List 2017 X5 M Sport Pac ... [0.00] 2015 M235i, F23 [0.00]	ditto !
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04-19-2009, 10:06 PM	#8
RemovedUser Guest 0 Rep n/a Posts Drives:	Anyone Care to fill in what the recommended pressures are?
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04-20-2009, 03:05 AM	#11
Mahhvinn EUROPROJEKTZ 187 Rep 7,958 Posts Drives: backwards Join Date: Dec 2008 Location: San Jose, CA (Bay Area) iTrader: (15) Garage List 2008 E90 335i [7.00]	i run the BMW recommended pressure for my stock rft's
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04-20-2009, 04:46 PM	#12
Gesler First Lieutenant 136 Rep 356 Posts Drives: e90 M3 Join Date: Jul 2007 Location: US iTrader: (0)	For stock RFTs (Bridgestone Potenza), the manual says 32 front and 38 rear for speeds upto 100mph. __________________
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04-28-2015, 10:16 PM	#13
Vicious New Member 0 Rep 5 Posts Drives: 2010 E90 335i Sedan Join Date: Apr 2015 Location: United States iTrader: (0)	I just got my E90 last Friday. I've noticed a second sticker, that says for speeds over 100mph, run your tires (i have a 2010 e90 335i w/M-Sport 18's) at 39 front/46 rear. Anyone doing this, or running higher than the below 100mph 36/39? That seems insanely high, but this is my first experience with Run Flats.
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