We should be using 3D printing for everything. Need a new tire or tube? Just print one. New chain or cables? Ditto. Want a cassette made from a single piece but are too cheap to buy Red? No problemo. About to go on a ride and discovered you're out of gel? Just print a few packets (the printed ones would probably taste better too). And what better way to upgrade your shifters than to just print the ones you want?

Just imagine the possibilities...