Thanks guys! When I started doing these rounds of "Sat pics" my goal was to see if I could make it a year without missing a Saturday. Well I knew that I started in August of last year so I went back and had a look at the dates..... I'm pretty sure I've got my year in now! I guess if I quit now or miss a couple, I won't feel bad because I've met the goal that I set for myself.
The wheels could be a combination of reflections/brake dust/water spots. It had started pouring rain just before I pulled in the building and was still raining while I was shooting these.