what is the optimal offset for 18"x7.5" wheels on an A4? many, many confusing questions inside.
03-24-2004, 10:28 AM
#1
AudiWorld Super User
Thread Starter
Join Date: Mar 2000
Posts: 6,450
Likes: 0
Received 0 Likes
on
0 Posts
what is the optimal offset for 18"x7.5" wheels on an A4? many, many confusing questions inside.
basically, my wheels are currently 18"7.5" with ET38, and i want them to be more "flush". rears especially.
i STFA and now my head hurts. i drew diagrams and my eyes hurt.
ET35 for 8" rim seems optimal. no data for 7.5" though, and with a .5" narrower wheel, this would also affect the optimal offset, correct? am i right to assume the offset should be around ET40? (35mm + half the wheel width increase of 6mm)
also, does adding spacers INCREASE or DECREASE the ET # when determining total offset?
i am guessing i should try 5mm spacers up front, and 8mm spacers in the rear.
thanks to any who help.
<img src="http://pictureposter.audiworld.com/810/cimg0420.jpg">
i STFA and now my head hurts. i drew diagrams and my eyes hurt.
ET35 for 8" rim seems optimal. no data for 7.5" though, and with a .5" narrower wheel, this would also affect the optimal offset, correct? am i right to assume the offset should be around ET40? (35mm + half the wheel width increase of 6mm)
also, does adding spacers INCREASE or DECREASE the ET # when determining total offset?
i am guessing i should try 5mm spacers up front, and 8mm spacers in the rear.
thanks to any who help.
<img src="http://pictureposter.audiworld.com/810/cimg0420.jpg">
03-24-2004, 11:38 AM
#4
AudiWorld Super User
Thread Starter
Join Date: Mar 2000
Posts: 6,450
Likes: 0
Received 0 Likes
on
0 Posts
would 5mm front and 8mm rear be too much? maybe 2mm front and 5mm rear is better?
any help on figuring optimal offset for 18"x7.5" wheels on an A4 would be nice.
03-24-2004, 12:04 PM
#5
Former Vendor
Join Date: Jun 2003
Posts: 5,234
Likes: 0
Received 0 Likes
on
0 Posts
Re: would 5mm front and 8mm rear be too much? maybe 2mm front and 5mm rear is better?
There is really no perfect number for offset in this case as it sounds like you're simply trying to deal with the appearance issue. We don't use spacers often so unfortunately I have little experience with their usage. I do know that you should be sure they're hubcentric and that you find longer bolts to go with them.
03-24-2004, 12:13 PM
#7
Former Vendor
Join Date: Dec 2000
Location: San Diego, CA
Posts: 15,545
Likes: 0
Received 0 Likes
on
0 Posts
9mm spacer..
An 18x8 ET35 sticks out 66.6mm from the hub.
An 18x7.5 ET38 sticks out 57.3mm from the hub.
So ideally you'd want a 9mm, which would stick out the same as the 18x8ET35. Probably safe with an 8mm for the achieved look.
Hope that helps, let me konw if you have any questions.
An 18x7.5 ET38 sticks out 57.3mm from the hub.
So ideally you'd want a 9mm, which would stick out the same as the 18x8ET35. Probably safe with an 8mm for the achieved look.
Hope that helps, let me konw if you have any questions.
Trending Topics
03-24-2004, 12:32 PM
#8
AudiWorld Super User
Thread Starter
Join Date: Mar 2000
Posts: 6,450
Likes: 0
Received 0 Likes
on
0 Posts
beauty! (that was my measurement as well in one of my diagrams) thanks for the back-up!
so maybe 8mm front and 10mm rear would give a good agressive stance with minimal concern for rubbing up front?
rears look like they need to come out more than the fronts.
who knew figuring something like this could take so much effort ;-)
rears look like they need to come out more than the fronts.
who knew figuring something like this could take so much effort ;-)
