I bought a ready-to-ship CrossTour a couple of years ago, and I haven't ridden it very much because it came with the Sturmey Archer 3 speed IGH, and I live in a place that's hilly enough for that to not really work. I'm wanting to upgrade to something else but I'm not sure what my options are. I think the CrossTour is 170mm so there's no Kindernay option right now? Maybe it's just the Rohloff? I'm not sure which exact model I need and how involved the upgrade process might be. Any suggestions would be welcome!