Internally Geared Hubs - Build Advice
a friend wants me to build him a bike using an internally geared hub but I have never messed with one before and am seeking advice. he's a coworker and is older and rather large. He's very excited about the idea of a bike built just for his needs, and I'm happy to oblige, but have a few questions on the hubs and frame. His desires are disc brakes (at least in front) and an internally geared hub (3 speed preferred). I would also like to use a 29er or cyclocross type frame with 700c wheels as I think it'll fit his usage.
after some research I've realized there are three choices for the hub, sturmey-archer, sram s7/p5/t3, and shimano nexus. My question is this... the sram s7 seems to be the only hub with 135mm rear spacing. the sturmey-archer AW3 is 126.8 or 118.8 and i'm not sure what type of frame i can get to match that spacing. does anyone have recommendations when it comes to internally geared hubs and frames which match his spec? advice would be greatly appreciated.