Hello,
Thank you for the ranking. I kept the logo to just two colors. The grey shading on tire ( #24 and #30 ) is also a screen tint of the black, so that it would not incur any additional cost in printing. I also submitted #29 which has no grey in case you need it 2-color without screen tints. If you would like to see it full color please let me know. Additionally on version #28 - #30 I outlined the Bauer Built text so that it stand off the black tire better than in #24. (Keep in mind that this is only a rough and that after the contest is over than the uploaded .png file can be replaced with the higher resolution and more scalable eps file. Transferring that file after the contest will be no problem, even if its very large.
Please feel free to request any revisions.
Thank you.
Night Owl