I have been thinking about selling my Sherpa and getting something with a Rolhoff gears. After reading this and seeing the spare parts list on the SJSC website I'm having second thoughts. I know normal gears are not perfect but at least most people can fix then and get spare parts. Is a Rolhoff worth the cost if you are not doing mega miles.
Bobs - don't let my disappointment cloud your decision too much. I cheerfully admit that I was unlucky, and that, from what I have seen, most Rohloffs perform faultlessly. I was one of the unlucky 1/2%. On balance I'm still happy that I bought one and will use it for all my day-to-day stuff. After a few months of riding I may even feel more confident about touring on it again.
It's probably a bit cheeky of me suggesting this on a Thorn website, but you could always do what I did, hedge your bets and get the rear left-hand droput of your Sherpa elongated by a frame builder and retrofit a Rohloff, albeit with a chain tensioner. I did it to my Nomad and it works fine.
Having said that, there's nothing better than a frame specifically designed for the hub and the Raven series do seem to be the bee's knees...
Cheers