Joined: Jun 2013
Posts: 4,094
Likes: 2
From: Bozeman
Bikes: 199? Landshark Roadshark, 198? Mondonico Diamond, 1987 Panasonic DX-5000, 1987 Bianchi Limited, Univega... Chrome..., 1989 Schwinn Woodlands, Motobecane USA Record, Raleigh Tokul 2
For me it's more of a problem with snow getting packed into the cassette, and there's nothing you can do about that. My derailleur never froze, and I'm in -30 degree territory here in MT.
There is no guard for the derailleur because it moves. The guard would have to be massive.