ACS possibly causing tire cupping

ausfahrt · 05-10-2013, 08:33 AM

My front tires are cupping http://www.ehow.com/about_5509983_ca...ing-tires.html. They are a lot of factors I understand. But has anybody have any problems yet with the ACS springs? I have Dunlops SP Sport 9000. I always drive in Sport mode so the suspension would be a bit taut. I know if I take it to the dealership they are going to blame the Springs! I dont want to spend another 1000.00 to take them off. Anybody in MO closer to IL can help take them off?

Thanks

Alan l. · 05-10-2013, 09:14 AM

No issues with my Michelin PSS tires and ACS springs.

Vinfast · 05-10-2013, 10:03 AM

Complete even wear on my Michelin PS2 and ACS springs!!

Chili Palmer · 05-10-2013, 12:47 PM

Sometimes low air pressure will cause cupping. What pressures are you running?

alextremo · 05-10-2013, 03:33 PM

no issues here.

ausfahrt · 05-10-2013, 03:37 PM

Quote:

Originally Posted by Chili Palmer

Sometimes low air pressure will cause cupping. What pressures are you running?

I keep the fronts at about 40-45 and the rears at 38-42.

snj1013 · 05-10-2013, 07:32 PM

What size tires are running.

ausfahrt · 05-10-2013, 08:46 PM

Quote:

Originally Posted by snj1013

What size tires are running.

My mistake I have TOYO Proxies T1R's
Fronts 255/30ZR21 93Y Rears 295/25ZR21 96Y

Chili Palmer · 05-10-2013, 09:06 PM

Quote:

Originally Posted by ausfahrt

I keep the fronts at about 40-45 and the rears at 38-42.

Actually your pressures seem kind of high - you should be wearing the centers of your tread out with those pressures.

snj1013 · 05-11-2013, 09:56 AM

Front pressures do seem high. Also, rear pressures are a couple of pounds higher than fronts. I'd take the fronts down to 38 or so, and keep the rears around 40.

ausfahrt · 05-11-2013, 10:24 AM

Quote:

Originally Posted by snj1013

Front pressures do seem high. Also, rear pressures are a couple of pounds higher than fronts. I'd take the fronts down to 38 or so, and keep the rears around 40.

I'll try that out for a week or two and see if that will help. Is this the correct numbers for the ACS front and rears? Front 3133 210 410, rear 3353 210 410? I just want to make sure that it was installed correctly!

Vinfast · 05-11-2013, 11:02 AM

I run my front 245/35/20s at 55 and my rear 285/30/20s at 45. Of course I've had to replace my rears from hard acceleration from my Dinan Stage 2, but no cupping and the fronts have very little even wear at 26k miles on my Michelin PS2s. I've found after having many BMWs that the fronts will last twice as long if you over inflate them since they typically wear out on the outer and inner sides first. I have a little outer and inner wear from the mileage but no center wear from over inflation.

ausfahrt · 05-11-2013, 03:52 PM

For the springs on the 550 is this correct? Front 3133 210 410, rear 3353 210 410?

05-10-2013, 08:33 AM	#1
ausfahrt Private First Class 33 Rep 177 Posts Drives: 2001 325i Touring Join Date: Jun 2007 Location: misery iTrader: (0)	ACS possibly causing tire cupping My front tires are cupping http://www.ehow.com/about_5509983_ca...ing-tires.html. They are a lot of factors I understand. But has anybody have any problems yet with the ACS springs? I have Dunlops SP Sport 9000. I always drive in Sport mode so the suspension would be a bit taut. I know if I take it to the dealership they are going to blame the Springs! I dont want to spend another 1000.00 to take them off. Anybody in MO closer to IL can help take them off? Thanks
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05-10-2013, 09:14 AM	#2
Alan l. Major General 5428 Rep 8,801 Posts Drives: 2020 F95 X5M Competition Join Date: Jun 2009 Location: United States iTrader: (9)	No issues with my Michelin PSS tires and ACS springs. __________________
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05-10-2013, 10:03 AM	#3
Vinfast Lieutenant 28 Rep 585 Posts Drives: '14 550i M-Sport Join Date: Jan 2011 Location: Warner Robins, GA iTrader: (2)	Complete even wear on my Michelin PS2 and ACS springs!!
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05-10-2013, 12:47 PM	#4
Chili Palmer Master Of My Domain 89 Rep 669 Posts Drives: 2015 650i Gran Coupe Join Date: Apr 2012 Location: SoCal iTrader: (3)	Sometimes low air pressure will cause cupping. What pressures are you running? __________________ RIP: 2015 Black Sapphire Metallic 650i Gran Coupe, 343 Wheels, Michelin Pilot Super Sports 255 F / 285 R, M6 Front Grilles. Coming - M6 Comp. Mufflers, Carbon Fiber Diffuser & Spoiler.
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05-10-2013, 03:33 PM	#5
alextremo Captain 49 Rep 966 Posts Drives: F10 550i Join Date: Sep 2008 Location: USA iTrader: (5)	no issues here.
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05-10-2013, 07:32 PM	#7
snj1013 Captain 87 Rep 937 Posts Drives: 2011 528i Join Date: Jul 2011 Location: Houston, TX iTrader: (1)	What size tires are running.
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05-11-2013, 09:56 AM	#10
snj1013 Captain 87 Rep 937 Posts Drives: 2011 528i Join Date: Jul 2011 Location: Houston, TX iTrader: (1)	Front pressures do seem high. Also, rear pressures are a couple of pounds higher than fronts. I'd take the fronts down to 38 or so, and keep the rears around 40.
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05-11-2013, 11:02 AM	#12
Vinfast Lieutenant 28 Rep 585 Posts Drives: '14 550i M-Sport Join Date: Jan 2011 Location: Warner Robins, GA iTrader: (2)	I run my front 245/35/20s at 55 and my rear 285/30/20s at 45. Of course I've had to replace my rears from hard acceleration from my Dinan Stage 2, but no cupping and the fronts have very little even wear at 26k miles on my Michelin PS2s. I've found after having many BMWs that the fronts will last twice as long if you over inflate them since they typically wear out on the outer and inner sides first. I have a little outer and inner wear from the mileage but no center wear from over inflation.
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05-11-2013, 03:52 PM	#13
ausfahrt Private First Class 33 Rep 177 Posts Drives: 2001 325i Touring Join Date: Jun 2007 Location: misery iTrader: (0)	For the springs on the 550 is this correct? Front 3133 210 410, rear 3353 210 410?
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