spinningmagnets, follow your posts and you seem to be the most knowledgeable w.r.t. IGH stuff. Do you have knowledge of actual factory steady use torque rating for the Sturmey Archer's? Lots of good anecdotal stuff here, but the setup I'm researching could twist the SA 5 speed at ~45 ft*lb + whatever my wife's legs would add. There's no reason for SA not to put this value out there. I use a NuVinci 171, with Developers Kit, on 2 apps, and the published, steady state, input torque limit they provided allowed me to design to stay under it.
Thanks for your first response....