Sounds rad. I'm running an X-FD/X-RDF combo on an INB; couldn't be happier. Be advised that the X-RDF is about the only rear hub i've ever seen with a 9x1mm axle. Seemed underbuilt, bt i've had no problems after a few years and many hard miles under my 250+/- rear-end.... i think a singlespeed version at 110mm should be fine, but i'd fully expect to bend the axle if it were spaced out with a multispeed freewheeel on on it...