Thanks to all for posting the great info and pics here. Jeffbeerman2, nice job. I just bought a Surly Crosscheck frame and am gathering up parts to put it together. I'm going to install a Nexus with 38x20, with moustache bars instead of drops. I just ordered the hub, will build up the wheels after it arrives. I'll have to think about the chain cover, doesn't rain much in my area but it would be nice to keep the sand out of the chain.