Hi, I'm trying to figure out something here. Just last week, on a 25F degree night, I left work for my 3 mile commute home. The bike rode fine as usual & I stopped 2 miles along at a store for a few things. After 15 or so minutes I got on the bike again but immediately had this specific problem: the crankset/chain/rearcog spun w/out moving the rear wheel, ie the rear hub.
This didn't happen all at once, the rear wheel would "catch" & then the bike would move. Then, as I rode, the rear wheel/drivetrain problem would happen again & again, until 4 miles along when the rear cog would just spin clockwise or counterclockwise with no effect on the rear hub.
After walking the bike to my apt, and waiting maybe a half-hour, the rear cog started moving the rear hub/wheel once again.
OK....anybody can tell me what happened here? I assume that the internal parts of the rear hub somehow froze so the cogs movement was unaffective, right? Let me know what you think.