Has anyone out there ever had a brake cable fail? I certainly haven't. However if this is what's running through your head as your reaching mach 1 in city traffic then of course consider a rear brake but isn't a quality hub with a coaster an oxymoron? I have a city cruiser built up with a classic old steel frame and a shimano nexus 7sp hub with a coaster. I've had the hub apart trying to see if I could defeat the coaster but even with Sheldon Brown on the case it seems hopeless. Bottom line is I don't want the coaster because: (a) don't need it (b) much better to be able to backpedal freely when using clips in traffic, at stop lights etc.