Decent commute at 27F and sunny with no winds. First time using panniers that I picked up last week, and they are awesome. About 5 mins into my commute, my RD froze up and quit shifting. It was like that for about 3/4 of the ride. It was stuck to where I was easily spinning out on the flats in the big chain ring. Usually my FD is the one that freezes, so I lubed the cable very well last night. I've never had an issue with the rear till today. Looks like I'm gonna be busy when I get home lubing the rear cable.