ET calculations
05-13-2010 | 10:12 AM
#1
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From: Helsinki, Finland
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
Hi all, I'm comparing two sets of wheel ET's:
Standard: 19" 331's: Front 8½? ET33 and Rear 9? ET44
vs.
Option: 19" 235's: Front 8½? ET25 and Rear 9½? ET39
Tires are Front 245/40 and Rear 285/35 19?
My calculation brings the option wheels (235's) outwards Front 8 mm and Rear 11,35 mm
compared to the standard 331's.
Do you think my calculations are correct?
Standard: 19" 331's: Front 8½? ET33 and Rear 9? ET44
vs.
Option: 19" 235's: Front 8½? ET25 and Rear 9½? ET39
Tires are Front 245/40 and Rear 285/35 19?
My calculation brings the option wheels (235's) outwards Front 8 mm and Rear 11,35 mm
compared to the standard 331's.
Do you think my calculations are correct?
05-13-2010 | 10:30 AM
#2
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My Ride: 2007 530d M Sport Automatic, Le Mans Edition.Le Mans Blue Individual Paint Special, Syrah Blue Individual Leather, Piano Black Individual Interior Trim, Front seat heating,M Double Spoke 172 19
Hi all, I'm comparing two sets of wheel ET's:
Standard: 19" 331's: Front 8½? ET33 and Rear 9? ET44
vs.
Option: 19" 235's: Front 8½? ET25 and Rear 9½? ET39
Tires are Front 245/40 and Rear 285/35 19?
My calculation brings the option wheels (235's) outwards Front 8 mm and Rear 11,35 mm
compared to the standard 331's.
Do you think my calculations are correct?
Standard: 19" 331's: Front 8½? ET33 and Rear 9? ET44
vs.
Option: 19" 235's: Front 8½? ET25 and Rear 9½? ET39
Tires are Front 245/40 and Rear 285/35 19?
My calculation brings the option wheels (235's) outwards Front 8 mm and Rear 11,35 mm
compared to the standard 331's.
Do you think my calculations are correct?
05-13-2010 | 10:32 AM
#3
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From: West LA
My Ride: 2005 BMW 545i
I always use this for offset calculations. Don't forget changes in inner clearance as well!
http://www.1010tires.com/WheelOffsetCalculator.asp
http://www.1010tires.com/WheelOffsetCalculator.asp
05-13-2010 | 11:10 AM
#4
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From: Rijswijk, The Netherlands
My Ride: 2005 E60 523 executive
20"ASA / Bi-Xenon / Full M-tech / LED Angel Eyes / Matte Black Kidney's / LED Side Markers
Yup...the rear has 5mm diference...
But I don't understand why you have ET44 on the rears (and ET 33 on the front) of your standard set...I understand that the e60 needs ET15 to ET25 to fit right..
Are you using spacers on this standard set??
But I don't understand why you have ET44 on the rears (and ET 33 on the front) of your standard set...I understand that the e60 needs ET15 to ET25 to fit right..
Are you using spacers on this standard set??
05-13-2010 | 11:15 AM
#5
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'cuz I think the OP talkin' 'bout wheels for F10 ...
05-13-2010 | 11:32 AM
#7
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People haven't even figured out what's a "proper" size for the E60 besides the typical, conservative fitment and now the F10 is just around the corner. Hopefully those with the F10 will be more adventurous and push the limits a little.
05-13-2010 | 12:18 PM
#8
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My Ride: MY07 525xi Silver Gray
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Small/lower ET True for E60 RWD but the big/small ET also true for E60 AWD/xi/X-Drive like mine 
05-13-2010 | 12:31 PM
#9
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From: Helsinki, Finland
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
05-13-2010 | 12:38 PM
#10
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From: Helsinki, Finland
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
The rear wheel will come out 5 mm (44 - 39 = 5), this is easy.
But I'm adding to that a half of (the other half goes inside) a half of an inch (9 1/2" - 9") = some 12 mm, divided by 2 = 6 mm.
Outwards 5 + 6 = 11 mm!
To TakmaN
The inside will not be a problem since the 6 mm inward will be compensated almost fully by the 5 mm outward = 1 mm inward.
The optional rear tire will be 285/35 19" (doesn't really matter in the wheels calculations, as a +10 mm wider tire is legal in Finland).
The standard 331 rear wheel would be 9" and the tire 275/35 19?