Maybe cycling is that important to you, but it's not to me. I'm contemplating tattoo's, but only if they really mean something to me in life and not just a hobby. Maybe cycling is your life, but its not to me.

With that said, I got the piston thing immediately and thought it worked well. It kind of reminded me of the scene in Titanic where they go into the engine room and those huge pistons are pumping up and down. The gimmick may fade though. Maybe get a slogan instead like, 'It doesn't get any easier, you only get faster.'