I like my Paul Components rear flip/flop hub, but will soon be trying a Phil's rear SS only hub. I didn't know they made such a beast till I was emailing Phil's service department on a different matter and the subject of rear hubs came up. According to Phil's, they don't list them in their web catalog due to low demand, but they are avaliable direct from Phil's. I'll be building up a rear wheel (actually the LBS will build it) with this hub as soon as it gets here.