PaulRivers;

I agree that the Uptown 8 is the only bike I am aware of with a full chaincase except for the Chinese and Indian utility cycles which weigh a ton and some Pashley models. Never been able to figure out why the American importers/distributors of commuter bikes do not spec them with full chaincases. The cases have to be available to them as similar bikes for the European market, also from Taiwan or China, have them fitted.

IMO all chain drive utility bikes fitted with gear hubs should include a well designed full chaincase.

The figures I have seen for shaft drive bikes indicate a approximately 2.5% power loss for each bevel gear pair. True when introduced over 100 years ago and still true today so far as I know.