Originally Posted by HillRider
There are chain tensioners made for fixed gear/single speed bike with vertical dropouts so I don't see why they wouldn't work with an internally geared hub too. Try Sheldon Brown's Fixed Gear web site area as I'm pretty sure he sells them.
Don't waste your money. As I said above, good luck finding a hub that will work with vertical dropouts. Vertical dropouts are great for derailer bikes, and close to useless for most anything else.
On a more nit-picky note, chain tensioners are not intended for and should not be used on a fixed-gear bike, as they will self-destruct as soon you try to slow down by resisting the pedal motion.