fixed gear bike
Note: silver metal in dropout is a cut in the frame to install/remove the belt. Carbon Drive Systems makes the custom dropouts.
http://www.carbondrivesystems.com
New belt drive system from Carbon Drive Systems in CO. Looks very promising...
so far being used on singlespeeds, fixies and internal-geared hub bikes.
http://www.spotbikes.com/
http://www.carbondrivesystems.com