Originally Posted by
wahoonc
I have bench tested several AG/FG hubs and a few GH-6 hubs. The rear hubs produce a bit less than the front hub, typically about .2 watts less. If you use LED lights it is moot. I run FG, AG and GH6 and have had zero problems with any of them.
Aaron

+1 on the slightly less output from the rear dyno. If you go with the GH6 make sure it has good cones, replacements are difficult to find.