Tire pressure question for 235/40/18 tires

Navin323i · 08-02-2005, 02:22 PM

I'm currently using Lowenhart BR5 rims mounted on Goodyear Eagle F1 GSD3 tires. My tire pressure is currently 36psi for all four tires. Is this PSI okay or should I be using more/less? I searched thru the archives and saw some people used more and some used less.

Also, when I'm not able to diligently check my tire pressure, I was thinking of getting the following tire pressure monitors to allow me to visually ensure that my tire pressures are okay. Are these accurate? I would buy four of these with a 36psi rating.
http://www.brookstone.com/shop/produ...ry&prodtemp=t2

slow323ci · 08-02-2005, 03:02 PM

Is that tire size listed on the tire pressure sticker on your driver side B-pillar? If so, use the pressures recommended there.

Navin323i · 08-02-2005, 03:12 PM

Quote:

Originally Posted by slow323ci

Is that tire size listed on the tire pressure sticker on your driver side B-pillar? If so, use the pressures recommended there.

No, unfortunately my tire size is not listed on the tire pressure sticker on the driver side B-pillar.

slow323ci · 08-02-2005, 03:38 PM

There's usually 2 choices on the sticker. One for <= 4 passengers and one for 5 passengers and/or max load capacity.

From what I've seen the recommended pressure for most tire sizes is 29 front, 33 rear for <= 4 passengers and 33 front 41 rear for max load capacity.

I run 29 front, 33 rear on both my BMW's. My E46 has 225/40-18 in front and 255/35-18 in back, my E39 has 235/45-17 all around.

Navin323i · 08-02-2005, 04:10 PM

Quote:

Originally Posted by slow323ci

There's usually 2 choices on the sticker. One for <= 4 passengers and one for 5 passengers and/or max load capacity.

From what I've seen the recommended pressure for most tire sizes is 29 front, 33 rear for <= 4 passengers and 33 front 41 rear for max load capacity.

I run 29 front, 33 rear on both my BMW's. My E46 has 225/40-18 in front and 255/35-18 in back, my E39 has 235/45-17 all around.

Yeah, I did see the 225/40/18 size on the sticker, but it was a little confusing because I saw a circle symbol next to this size and then saw under the PSI column for the front tires the same circle symbol next to the 33psi (so I gathered from this that the recommended front tire pressure should be 33psi), however I did not see the circle symbol next to any of the recommended psi's under the PSI column for the rear tires.

08-02-2005, 02:22 PM	#1
Navin323i Europrojektz East Join Date: Dec 1969 Location: DC Metro Area Posts: 7,305 My Ride: See Sig View My Garage	Tire pressure question for 235/40/18 tires I'm currently using Lowenhart BR5 rims mounted on Goodyear Eagle F1 GSD3 tires. My tire pressure is currently 36psi for all four tires. Is this PSI okay or should I be using more/less? I searched thru the archives and saw some people used more and some used less. Also, when I'm not able to diligently check my tire pressure, I was thinking of getting the following tire pressure monitors to allow me to visually ensure that my tire pressures are okay. Are these accurate? I would buy four of these with a 36psi rating. http://www.brookstone.com/shop/produ...ry&prodtemp=t2 __________________ My 2 Little Girls... the REAL carbon fiber keeping my mechanical heart alive BMW Individual Atlantis Metallic Twin Screw S/C'ed 2000 323i SPONSORED BY: BBS \| Modbargains \| Toyo Tires \| DPE \| WheelSTO \| Vorsteiner \| European Auto Source \| Bimmertools \| GetBMWParts.com \| Race Apeel

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08-02-2005, 03:02 PM	#2
slow323ci E46-free since 10-13-06 Join Date: Oct 2002 Location: Real world Posts: 5,325 My Ride: 335i coupe View My Garage	Is that tire size listed on the tire pressure sticker on your driver side B-pillar? If so, use the pressures recommended there.

08-02-2005, 03:38 PM	#4
slow323ci E46-free since 10-13-06 Join Date: Oct 2002 Location: Real world Posts: 5,325 My Ride: 335i coupe View My Garage	There's usually 2 choices on the sticker. One for <= 4 passengers and one for 5 passengers and/or max load capacity. From what I've seen the recommended pressure for most tire sizes is 29 front, 33 rear for <= 4 passengers and 33 front 41 rear for max load capacity. I run 29 front, 33 rear on both my BMW's. My E46 has 225/40-18 in front and 255/35-18 in back, my E39 has 235/45-17 all around.