Redd

dunno, SnagIt. Used to be that all speedometers could be calibrated, and that was required for folks like the highway patrol before they could clock you to write up a ticket.

Unless ALL of the Audi wheel and tire options wind up being the exact same diameter, they also have to have some way to calibrate. On some cars, that's done by changing a speedometer gear but I'd expect these are using hall sensors and magnets or some other digital non-contact counter, which is easily adjusted in software.

Tirerack shows 235/60-18 and 235/55-19 both as OEM sizes. If I get my math right, that works out to:

60% of 235mm => 141mm of tire height, 282mm of extra diameter on the 18" (457mm) wheel...total diameter of 282+457 => 739mm. Circumference of 2321.6mm

55% of 235 => 129.25, times 2 => 258.5mm, added to 19" (483mm), that's 258+483 => 741.5 mm. Circumference of 2329.5mm.

So the stock 18" and 19" packages probably would not need a calibration change since that's less than a half percent difference, and a lower profile 20" still might not. Tirerack shows a 22" set using 255/35, talk about LOW profile tires.

biff2bart

I have a set of 20 x 9" Hartmann RS4 / RS6 reps on my Q5: I think they look great! Zero issues driving: they feel and look just like OEM wheels. Probably not the lightest option out there, but they'll be around for a long time

http://hartmannwheels.com/vw-wheels#wheel84

I'll try and get some pictures to post over the next day...

biff2bart

Oh yeah:

I'm pretty sure that my tires are 255mm x 20" x 45: they're Michelin Lattitude Sports.

biff2bart

Sry - first time posting - can't figure out how to edit post.

I was slightly incorrect in my wheel link: here are the actual wheels (correct colour and offset):

http://hartmannwheels.com/wheels/har...r-audi-fitment

wilshireblvd

Thanks for all the tips, guys! Will keep you posted and snap some pics once I find the rims.

Dalancroft

Those look sick. Err, bad. Err, awesome!

Candidate for when I move up from 19s to 20s (I always wait until I need new tires, so that will be like 40K more miles away).

Chuck2006

Please please please a picture! This would be exactly my winter setup! 20" RS4 rep

Redd

Your winter setup? Does anyone make a snow tire in that size?

255/45-20 ?

Chuck2006

Pirelli Scorpion for example.

Look at this recent thread.

https://www.audiworld.com/forums/sho....php?t=2857670

biff2bart

OK!!!!

Just had the Q5 washed as well!

I'll grab a cell pic Friday