the one we did was about singlespeed , we added a few details like a bottle of beer design in one of the back pocket etc...
i will put a link but the french forum is down . on the oatway website you can download a matrix of the shirts . we had a few shirts designed and then voted . I am bad at design but some of you are pros , so I ll leave this to you .
I like the retrobike logo a lot and we could take some of the T shirts design as well .