Hi there! Great project, enjoying working on it. I have a few questions.

Do you want colour included in the design, or would you prefer a B&W / grayscale approach to save on printing costs? If you do want colour is there any preference?

Also is there any preexisting branding that must be incorporated into the postcard?

Finally the tire. Must the whole tire be included in the design, or are you only after the top of it with the view down looking at the grooves? Also, to my discredit, I am no expert in tyre tread! Thankfully you guys are so could you let me know if you're wanting the grooves evenly spaced or if they should vary in any way? All the images I find of tyres have the grooves at uneven intervals with varying widths?

Black and white would be fine. No branding necessary. Do you have somewhere I can attach a picture of an actual tire showing the aspect I want? Its kind of hard for me to describe. The grooves can be spaced evenly/unevenly doesnt really matter. As long as the picture shows 4 main grooves.
Thanks

How is the picture of the tyre on the design I submitted?

If you have Dropbox or something I could get the image that way? Or you could tweet me it @joshieward