freewheel

What I thought was a cassette is actually a freewheel, a SunTour Two-Notch Freewheel, to be precise. I figured that removing the lockring would allow me to separate the individual sprockets, but I couldn't get it loose without a special tool. The nice folks at Wheat Ridge Cyclery did the job for me, but it turns out that the lockring only holds the bearings together, not the sprockets.