Looking at building a seattle winter commuter bike based on a cross check frame.

nexus 8 sp hub in the read w/ roller brake. for the front, I'm eying the SA xfd front hub. I want to avoid rim brakes.

Here's my question: VO is now offering a dyno hub that is switchable, so you can lose the resistance when you don't need the dynamo. Does anyone know of a hub that combos a switchable dynamo with a hub brake? SA makes a brake/dyno combo hub but it is not switchable.

Thanks much!