What determines Fender Roll?

jm3as · 03-02-2012, 06:04 PM

with all things held the same (i.e. lowered e92 on H&R sports, Koni Struts)

What determines fitment and if a fender roll may or may not be required?

Offset? or Width of the tire? (which i would figure it would be)

so i currently have rears with +32 10" width. slight rubbing.
looking to get +22 offset, 9.5" width.

in theory, the smaller width should be fine, even though the offset is more aggressive...right?

and just to be clear, is the +22 offset a DEEPER concave then the 32?

thanks for any help on this!

rmlink · 03-02-2012, 08:08 PM

This should help you. Wheel Offset Calculator http://www.1010tires.com/wheeloffsetcalculator.asp

landonvan · 03-02-2012, 08:38 PM

You are correct. In most cases the lower the offset the more concave. And with a 265 tire you should not rub. Just a fender roll will due.

1bade92 · 03-02-2012, 09:30 PM

If you're rubbing or not!

AOLI · 03-03-2012, 06:14 AM

I am running The M3 220s. The rear is et 23 and I have 265/30/19. I am on stock suspension and I rub slightly on dips with no roll. Getting fenders rolled and should be fine.

Pcemkr · 03-03-2012, 03:09 PM

Width, offset, and tire all determine where it sits.
9.5" et22 will sit 4mm out more than 10" et32

CombatNinja · 03-03-2012, 03:50 PM

Yeah, you'll be in worse shape with that new offset. You need to be around offset 30 on a 9.5 to be in the clear, or roll your fenders.

csupernova · 03-03-2012, 10:02 PM

Also, tires will determine rubbing or not. I tried offset 23 on my pre lci e90 rear wheel and it rubbed even with fender rolled. Then I realized I got a square shoulder tire.

jm3as · 03-03-2012, 10:33 PM

would the fender roll offer the 4mm extra to cover that extra poke then what my current setup is?

Pcemkr · 03-03-2012, 10:40 PM

Yes, you can gain 5mm with a fender roller.

jm3as · 03-05-2012, 12:33 AM

Quote:

Originally Posted by Pcemkr

Yes, you can gain 5mm with a fender roller.

Ok thanks!

03-02-2012, 06:04 PM	#1
jm3as Brigadier General 298 Rep 3,718 Posts Drives: 2007 e92 328i Join Date: Jan 2012 Location: Renton, Wa iTrader: (4)	What determines Fender Roll? with all things held the same (i.e. lowered e92 on H&R sports, Koni Struts) What determines fitment and if a fender roll may or may not be required? Offset? or Width of the tire? (which i would figure it would be) so i currently have rears with +32 10" width. slight rubbing. looking to get +22 offset, 9.5" width. in theory, the smaller width should be fine, even though the offset is more aggressive...right? and just to be clear, is the +22 offset a DEEPER concave then the 32? thanks for any help on this! __________________ facebook.com/jmeasphotography \| jmeas.4ormat.com \| IG: jmeasphotography
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03-02-2012, 08:08 PM	#2
rmlink Private 0 Rep 54 Posts Drives: Montego e92 335i Join Date: Jun 2006 Location: Madison, WI iTrader: (0)	This should help you. Wheel Offset Calculator http://www.1010tires.com/wheeloffsetcalculator.asp
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03-02-2012, 08:38 PM	#3
landonvan Private First Class 73 Rep 180 Posts Drives: 2015 f80 M3 Join Date: Oct 2011 Location: Fredericksburg VA iTrader: (1) Garage List 2009 E92 M3 [10.00]	You are correct. In most cases the lower the offset the more concave. And with a 265 tire you should not rub. Just a fender roll will due.
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03-02-2012, 09:30 PM	#4
1bade92 Second Lieutenant 21 Rep 203 Posts Drives: Ultimate Driving Machine Join Date: May 2007 Location: . iTrader: (0)	If you're rubbing or not!
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03-03-2012, 06:14 AM	#5
AOLI Enlisted Member 0 Rep 45 Posts Drives: 2011 335i Cab Join Date: Jan 2012 Location: Long Island iTrader: (0) Garage List 2011 BMW 335i [0.00] 2002 Jeep Liberty [0.00] 2011 Range Rover Sport [0.00]	I am running The M3 220s. The rear is et 23 and I have 265/30/19. I am on stock suspension and I rub slightly on dips with no roll. Getting fenders rolled and should be fine.
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03-03-2012, 03:09 PM	#6
Pcemkr Pro Hater 57 Rep 1,717 Posts Drives: Low and slow Join Date: Apr 2011 Location: DC iTrader: (1)	Width, offset, and tire all determine where it sits. 9.5" et22 will sit 4mm out more than 10" et32 __________________ Username is now PSUSMU
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03-03-2012, 03:50 PM	#7
CombatNinja Banned 53 Rep 1,556 Posts Drives: e91 328i, e90 328i, e90 335i Join Date: Feb 2011 Location: United States iTrader: (0)	Yeah, you'll be in worse shape with that new offset. You need to be around offset 30 on a 9.5 to be in the clear, or roll your fenders.
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03-03-2012, 10:02 PM	#8
csupernova Captain 36 Rep 606 Posts Drives: BMW i4 Join Date: Sep 2007 Location: NYC iTrader: (7)	Also, tires will determine rubbing or not. I tried offset 23 on my pre lci e90 rear wheel and it rubbed even with fender rolled. Then I realized I got a square shoulder tire.
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03-03-2012, 10:33 PM	#9
jm3as Brigadier General 298 Rep 3,718 Posts Drives: 2007 e92 328i Join Date: Jan 2012 Location: Renton, Wa iTrader: (4)	would the fender roll offer the 4mm extra to cover that extra poke then what my current setup is? __________________ facebook.com/jmeasphotography \| jmeas.4ormat.com \| IG: jmeasphotography
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03-03-2012, 10:40 PM	#10
Pcemkr Pro Hater 57 Rep 1,717 Posts Drives: Low and slow Join Date: Apr 2011 Location: DC iTrader: (1)	Yes, you can gain 5mm with a fender roller. __________________ Username is now PSUSMU
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