The first time I went to autocross, I saw this guy with this wheel mount on the back of his car.
It looked similar to this, but it's for tires. any idea what it was and where to get it? I've never seen the guy since, so couldn't ask him...

http://www.swagman.net/mtr_bike.jpg

?

Cool concept. Maybe it was custom made.

hmmm... could be... i am going again next month. they only hold track day once a month. i'll see he is there this time. if i see him i'll ask him about it... anyone else have seen something like this before?

JC Whitney has a tire tray for 4 tires that hookes up to a trailer hitch. I've seen completitors show up with their tires on that tray whose cars are far too shy on cargo capacity to carry their slicks. Take the tires off and slide the tray off the hitch and off to competition you go.

Yes, there are trailer hitches that fit on an RS.

pics by any chance?

Go to dress up and style, go back 5 days, look for "I installed my hitch today too..." I would just put up a link but I am a computer moron.
Ben