This is a pretty cool direction too. I like the abstract V that is representative of treads, whether it be bike tires or running shoes. Even the "A" looks tread-like. Pretty cool. #7 is uber-cool concept, but my concern on that is readability. #8 looks like it might be more automotive related or at least bike only. I wonder what it would look like if the V elements were flipped an used as the "A" in Tread, and maybe in Threads as well.
I like the yellow color, but I think I like it better the way you first had it flipped like a V. I guess that's why your the designer and I'm not! I am having trouble deciding if I like the abstract tread icon or the T-shirt with tracks concept. Maybe a hybrid would help me decide. Your abstract icon on a Tshirt?
there is a lot to look at on this one. I incorporated running shoe tread inside of the tshirt that is made out of the bike tread. There is also a "TT" on the shirt in case you ever want it to stand alone.