Recommended psi for 235/40/18??

Jay328xi · 02-12-2011, 10:55 PM

Does anyone know what the recommended psi for a square set up of 235/40/18 continental dws tires is? I'm currently running 30psi all around.

Lubo · 02-13-2011, 09:31 AM

That is on a low side. Your MPG probably suffers and your car must feel floaty, I would bump it up to 36 all around and go from there.

Jay328xi · 02-13-2011, 08:39 PM

thanks!

x26 · 02-13-2011, 10:32 PM

I like 34psi all around
Performance center had them 32 front 36 rear--Too stiff in the rear for me.

Try 34 front & Rear--I like it; Handles well, nice ride, etc.

VMRWheels · 02-14-2011, 12:43 PM

I would recommend anywhere from about 35-38 PSI depending on driving conditions. 30 is on the low side.

-Charles@VMRWheels

Gary@TireRack · 02-14-2011, 12:53 PM

I agree with the others. 30psi is probably a bit too low for an Xi.

Tee212 · 02-14-2011, 12:58 PM

Inflat them cold, 35-40 psi. Pressure jumps about 5psi give or take once the tires are heated up.

AWD Addict · 02-14-2011, 01:04 PM

I like 36 all around on my winters.

On my summer set up, I do 38 rear, 35 front to dial out most of the understeer.

02-12-2011, 10:55 PM	#1
Jay328xi Second Lieutenant 21 Rep 255 Posts Drives: TiAg 328xi Join Date: Feb 2010 Location: NJ iTrader: (1)	Recommended psi for 235/40/18?? Does anyone know what the recommended psi for a square set up of 235/40/18 continental dws tires is? I'm currently running 30psi all around.
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02-13-2011, 09:31 AM	#2
Lubo Lieutenant 23 Rep 475 Posts Drives: 15 335 iX Join Date: Nov 2008 Location: Long Island NY iTrader: (1)	That is on a low side. Your MPG probably suffers and your car must feel floaty, I would bump it up to 36 all around and go from there.
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02-13-2011, 08:39 PM	#3
Jay328xi Second Lieutenant 21 Rep 255 Posts Drives: TiAg 328xi Join Date: Feb 2010 Location: NJ iTrader: (1)	thanks!
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02-13-2011, 10:32 PM	#4
x26 First Lieutenant 17 Rep 358 Posts Drives: 335i Join Date: Sep 2007 Location: Dante's Inferno... iTrader: (0)	I like 34psi all around Performance center had them 32 front 36 rear--Too stiff in the rear for me. Try 34 front & Rear--I like it; Handles well, nice ride, etc.
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02-14-2011, 12:43 PM	#5
VMRWheels BimmerPost Supporting Vendor 2040 Rep 25,989 Posts Drives: BMW Join Date: Jun 2007 Location: Anaheim, CA iTrader: (4) Garage List 2013 BMW M3 [10.00] 2015 BMW M4 [0.00] 2013 BMW F30 [0.00] 2014 BMW F22 [0.00] 2013 BMW F06 [0.00]	I would recommend anywhere from about 35-38 PSI depending on driving conditions. 30 is on the low side. -Charles@VMRWheels __________________ VMR\|Wheels \| 714.442.7916 \| sales@velocitymotoring.com \| www.velocitymotoring.com \| facebook \| flickr \| Instagram
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02-14-2011, 12:53 PM	#6
Gary@TireRack Moderator 369 Rep 4,745 Posts Drives: Formerly 1995 M3 Join Date: Oct 2006 Location: South Bend, IN, Tire Rack HQ iTrader: (2)	I agree with the others. 30psi is probably a bit too low for an Xi. __________________ Gary. Tire and Wheel Forum Moderator. Tire Rack Sales Rep Gary@Tirerack.com http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp Please refer to 'Gary/E90 Post' as your previous contact when you order online to help support this forum.
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02-14-2011, 12:58 PM	#7
Tee212 Banned 81 Rep 4,541 Posts Drives: yes Join Date: Oct 2008 Location: Riverside iTrader: (9) Garage List 2010 335 [8.00]	Inflat them cold, 35-40 psi. Pressure jumps about 5psi give or take once the tires are heated up.
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02-14-2011, 01:04 PM	#8
AWD Addict Chief Executive 300 Rep 2,886 Posts Drives: 2008 335xi 6spd Coupe Join Date: Dec 2007 Location: Boston iTrader: (1) Garage List 2008 335xi [0.00]	I like 36 all around on my winters. On my summer set up, I do 38 rear, 35 front to dial out most of the understeer.
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