how do u compute for the offset?

d_stig · 07-08-2008, 11:50 AM

i have a E90 with 18x8 front and 18x8.5 ellipsoid OEM rims, im wondering what are its offset? im planning to get vertini wheels 19x8.5 40mm front and 19x9.5 45mm rear, would it look wider if i put in my car? TIA

GregL · 07-08-2008, 12:05 PM

Take a look for your particular wheel here: http://www.e90post.com/forums/showthread.php?t=464 The ET number is the offset, plug that into the calculator along with the other numbers.

Off-hand though I can say that 40mm/45mm offsets, front/rear respectively will be pretty far tucked in.

Edit: Ok I just ran it through the calculator based on 34F/37R. The Vertini's will sit at exactly the same outer point at the front, while the rears will extend an extra 5mm. Most people will want a wider stance to better fill out the fenders though. I have 19x8.5 ET30 front and 19x9.5 ET30 rear and they sit very nicely, a little more conservative would be ET32 front, ET35 rear.

07-08-2008, 11:50 AM	#1
d_stig New Member 0 Rep 12 Posts Drives: sapphire black 320d Join Date: Jun 2008 Location: Manila iTrader: (0) Garage List 2007 320d [0.00]	how do u compute for the offset? i have a E90 with 18x8 front and 18x8.5 ellipsoid OEM rims, im wondering what are its offset? im planning to get vertini wheels 19x8.5 40mm front and 19x9.5 45mm rear, would it look wider if i put in my car? TIA
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07-08-2008, 12:05 PM	#2
GregL Brigadier General 105 Rep 3,618 Posts Drives: 2016 CLA45 AMG Join Date: Nov 2005 Location: GTA iTrader: (4)	Take a look for your particular wheel here: http://www.e90post.com/forums/showthread.php?t=464 The ET number is the offset, plug that into the calculator along with the other numbers. Off-hand though I can say that 40mm/45mm offsets, front/rear respectively will be pretty far tucked in. Edit: Ok I just ran it through the calculator based on 34F/37R. The Vertini's will sit at exactly the same outer point at the front, while the rears will extend an extra 5mm. Most people will want a wider stance to better fill out the fenders though. I have 19x8.5 ET30 front and 19x9.5 ET30 rear and they sit very nicely, a little more conservative would be ET32 front, ET35 rear. __________________ 2016 Mercedes-AMG CLA45 2013 Mercedes-Benz B250 - Gone 2010 Mercedes-Benz C350 4Matic - Gone 2006 BMW 330xi - Gone 2001 Infiniti QX4 - Gone Last edited by GregL; 07-08-2008 at 12:29 PM..
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