Tire pressure for 20"'s
Senior Members
Joined: Feb 2005
Posts: 1,968
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From: S. California
My Ride: 545i; Manual Shifter
Good question.
The figure on the sidewall of the tire is the 'MAX' pressure you should not exceed.
The closer you set the pressure to the MAX recommended, the more bulbous the tire becomes which encourages uneven wear. On the other hand setting the pressure too low decreases handling performance around corners and causes the engine to consume more gas.
For what it's worth, I usually set my tire pressure to be about 5-7 PSI less than the MAX recommended.
The figure on the sidewall of the tire is the 'MAX' pressure you should not exceed.
The closer you set the pressure to the MAX recommended, the more bulbous the tire becomes which encourages uneven wear. On the other hand setting the pressure too low decreases handling performance around corners and causes the engine to consume more gas.
For what it's worth, I usually set my tire pressure to be about 5-7 PSI less than the MAX recommended.
Members
Joined: Jul 2005
Posts: 9
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From: San Diego, CA
Almost all setups should run between 35-38 psi regardless of wheel/tire size.
Do check the sidewall of the tire though as a reference.
Also check the inside edge of the door or sill and see what factory recommends.
You can also play with tire pressure to see what feels best, believe it or not +/- 3 psi makes a difference!
Do check the sidewall of the tire though as a reference.
Also check the inside edge of the door or sill and see what factory recommends.
You can also play with tire pressure to see what feels best, believe it or not +/- 3 psi makes a difference!
Thread Starter
Contributors
Joined: Dec 2004
Posts: 1,432
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From: Brazil
My Ride: 2007 E60 M5
Originally Posted by spyeng' date='Jul 22 2005, 12:26 PM
Almost all setups should run between 35-38 psi regardless of wheel/tire size.
Do check the sidewall of the tire though as a reference.
Also check the inside edge of the door or sill and see what factory recommends.
You can also play with tire pressure to see what feels best, believe it or not +/- 3 psi makes a difference!
Do check the sidewall of the tire though as a reference.
Also check the inside edge of the door or sill and see what factory recommends.
You can also play with tire pressure to see what feels best, believe it or not +/- 3 psi makes a difference!
[snapback]151901[/snapback]
Thanks
Members
Joined: Jul 2005
Posts: 32
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From: FREEPORT, NY
I keep my iFORGED at 42psi front and about 41 rear and although the ride is alittle more brittle, i NEVER have any issues with potholes or bumps, and the car is lowered about 2.5 with full coilover suspension (stiff) LOL
Here's a quick pic
Here's a quick pic
Senior Members
Joined: Feb 2005
Posts: 1,968
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From: S. California
My Ride: 545i; Manual Shifter
D2,
Very nice wheels!
How many miles have you put on them?
When you originally ordered the wheels, how long did it take to get to you? Right now, they are saying 5-6 weeks.
Thanks.
Very nice wheels!
How many miles have you put on them?
When you originally ordered the wheels, how long did it take to get to you? Right now, they are saying 5-6 weeks.
Thanks.
Contributors
Joined: Oct 2004
Posts: 14,776
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From: So Cal, USA
My Ride: 545iSMGSilver GrayAuburn Dakota LeatherLogic 7 Premium SoundSports Package
Originally Posted by spyeng' date='Jul 22 2005, 08:26 AM
Almost all setups should run between 35-38 psi regardless of wheel/tire size.
[snapback]151901[/snapback]
like you said "almost"
Whats the Max pressure for the tire? 51psi? I would go between 38 to 43pis. about 75% -ish of the MAX pressure.
the OEM 18" #124 wheels on the 545 are recommended 36 and 44 psi. I run 38/44
Contributors
Joined: Jul 2004
Posts: 1,591
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From: Costa Mesa, CA
My Ride: Gone: 2004 525i Jet Black, Built 03/04, Premium Package, Black Dakota Leather, Halogen to Euro Spec Bi-Xenons Retrofit, Dark Poplar Wood Trim, Steptronic Breyton Spirit Reps 20x9F 20x10R - Nitto NT555 245/35/20F-275/30/20R, M5 Front Bumper, H&R Sport Springs, Chrome Grills, 20% Tint, Euro Reflectors, Debadged, Aux Input, CIP v19.x
reviving this thread.
I want to see what other members are running with their 20" setups.
I'm running 35psi all around but I'm not convinced that's the correct pressure.
I want to see what other members are running with their 20" setups.
I'm running 35psi all around but I'm not convinced that's the correct pressure.
Contributors
Joined: Sep 2004
Posts: 1,183
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From: New Jersey
My Ride: 2004 525i Jet Black on Grey Interior---
Tint: Sides 20% Rear Windshield 5% Front Windshield 35%
Wheels: Zenetti Five's 20" by 8.5(front) 20" by 10(rear)--
Tires: Pirelli Asimmetrico 245/35/20(front) 285/30/20(rear)--
Body: Hamann Full Front Spoiler, Rieger Side Skirts, Rieger Rear Apron, AC Schnitzer Trunk Wing
Interior: AC Schnitzer Pedal Set and E-Break
Springs: H&R Sport Springs--
Audio: 2 12" Kicker L7's with a Rockford Fosgate 1501bd Amp With Custom Trunk Enclosure
SOON TO COME:
-M5 Mirrors
-M5 Trunk Finsher
-Brembo GT Big Brake Kit
-Hamann 6 Series Front Spliter Molded
-Hamann Roof Wing
-Full Custom Sound System with TV's
43psi all around, used to have 32.. such a difference