21F and partly cloudy with winds from the WNW @ 18mph and 8F windchill. Had to call it quits about 1/3 into my commute. I bent a part in the drivetrain accelerating from a stop light. It still kinda worked, but was extremely noisy and caused a lot of drag. I didn't want to take any chances and risk doing any further damage to the idler or chain, so I called my buddy who lived nearby. He picked me up and brought me and my broke down trike home. I plan to have it fixed tomorrow so I can commute Friday for finals.