Wheel spacers for a D3
01-14-2015, 09:13 AM
#11
01-14-2015, 09:33 AM
#12
AudiWorld Super User
Work thru offset math based on wheel specs.
Different optimal spacers for factory 8 ½'s vs. 9's. Plus some of the #'s in the replies might not be right.
01-14-2015, 10:32 AM
#14
01-14-2015, 01:53 PM
#19
AudiWorld Super User
Specifics:
So, you have non-D3 stock wheels at ET40, and thus the question. Stock would be ET46. Ideal from my experience (buttoned down but tires not protruding out of fender lip too much as you get to lower part of body) w/ 20 x 9 is a net ET of 34 in front and 26 in back (12 and 20mm spacers). One step more aggressive would be an ET of 31 in front and 21 in rear (15 and 25mm). Beyond that, if the suspension drops hard or you get extreme suspension compression you will get rubbing; ET 21 is already just starting to brush upper fender liner at extreme compression with 275's on the 9" wheel and I think the look isn't quite right when you see the car from behind in the lower fender area.
Because of your ET 40, you are a bit stuck in front. Puts you in a spacer range of 6-9mm. Those are not going to hub centric, so you run a fair amount more risk of vibration than with hub centric. Hub centric starts at 12mm, at least in H&R. Only one H&R variant BTW; you have to be careful at part# level. Your rear is easier at probably 15mm, an easy to find hub centric size.
As a rule of thumb with the two basic D3 stock wheel width and tire sizes, for anything on stock 8 ½'s on 255's, figure to reduce the spacer by approx 5mm to get to the 9" stock equivalent for basically the same look in any picture. Helps with the visualization. But that assumes ET 46. Since you are at ET40 on 9's and 275's, you would subtract more like 10mm from a stock 255 on 8 ½ set up with a given spacer.
Because of your ET 40, you are a bit stuck in front. Puts you in a spacer range of 6-9mm. Those are not going to hub centric, so you run a fair amount more risk of vibration than with hub centric. Hub centric starts at 12mm, at least in H&R. Only one H&R variant BTW; you have to be careful at part# level. Your rear is easier at probably 15mm, an easy to find hub centric size.
As a rule of thumb with the two basic D3 stock wheel width and tire sizes, for anything on stock 8 ½'s on 255's, figure to reduce the spacer by approx 5mm to get to the 9" stock equivalent for basically the same look in any picture. Helps with the visualization. But that assumes ET 46. Since you are at ET40 on 9's and 275's, you would subtract more like 10mm from a stock 255 on 8 ½ set up with a given spacer.
Last edited by MP4.2+6.0; 01-14-2015 at 02:21 PM.