This week we are working on the bike editor to make it much more complete. Once the beta is available, not only you will be able to change colors and materials, but also there will be a catalog of pieces. Down below you have a screenshot with the the new bike editor current state.
Finally, we have prepared a short video (exclusive for backers) where Xals shows and explains at what point the development is in terms of physics and what he is working on today. This is one of the latest few bugs to fix before the beta release. Remember you need to log in to the forum to see the link. Video -> Bmxthegame.com