NYCAudiFiend

hi guys..
i spoke to gary at tirerack and he told me that an 18x8 wheel can not use a tire 255 size.
aren't there guys runnning 255/40/18 tires on 18x8 RS4 replica's?

thanks all!

Boston Driver

I am basing this on the chart from the below linky:<ul><li><a href="https://forums.audiworld.com/a6/msgs/110254.phtml">https://forums.audiworld.com/a6/msgs/110254.phtml</a</li></ul>

brenner

Somebody should tell Audi -- 255/40R17 was the standard tire size on A6 4.2 w/sport package.

NYCAudiFiend

it questions whether stock 17x8 sport wheels i have with 255/40/17 is too narrow...
i dont get it?

i know kgnast is running 255/40/18 on his 18x8 replica RS4 wheels...

i want to hear if he thinks its ok...

Boston Driver

I would trust Gary on this. He is, after all, the resident expert, and tires are his living!

Boston Driver

<ul><li><a href="https://www.audiworld.com/model/a6/02/4_2_sedan.pdf">https://www.audiworld.com/model/a6/02/4_2_sedan.pdf</a</li></ul>

carbonLORD

The Pie Plates are also 8" wide IIRC and had 255's on them so.......?

NYCAudiFiend

exactly! stock we are running 255 with 8" width..so i dont get it either!

efoo

The S6 17x8" Avus rims also have 255/40/17 rubber

ryoung

may have slightly different specs for an approved or recommended rim, but for the 255/40-17 or 255/35-18, approved rims are 8.5-10" wide for the tires I've checked. This is sensitive to tire profile, and the taller 255/45-18 does use 8.0-9.5" rims. When in doubt, check the tire manufacturer's web site for recomendations for the specific tire and size.

For maximum performance, you'd generally use the maximum width approved for the tire, and I have no idea why Audi often uses wheels narrower than the minimum specified by the tire manufacturers. At best, expect less than optimum wear and performance; at worst, early tire failures could result.

BTW: I retired after 34 years of involvement with the tire industry, and I'm glad to see my original A6 Tire Options post has hit 2400 views :-)