I would HIGHLY recommend against getting a NuVinci hub. I bought one and spent around $500 total for the hub and getting it installed on a bicycle. The bike originally had a shimano 3 speed hub and I went from being able to go up every hill I encountered to having to rest part way up almost every hill I encountered. The efficiency of the hub is just atrocious. I can't even lift the front wheel off the ground with the NuVinci hub, even though the gear ratio should make it even easier than with the old hub.