Fastfingaz, I was given two of the ones that use sliding weights, both not shifting, one really screwed up by somebody working on it. The one I was able to repair I gave to one of my son's in law mother and the other had just too many issues and gave up some parts to the repaired one.

The system as I remember (been over ten years) kept cadence within a fairly narrow range, there was no ability to down shift and seemed best suited for neighborhood or gentle path riding. The bikes themselves were basically underwhelming otherwise. There are cyclists that are well suited to this bicycle.

Brad