Originally Posted by
Barrettscv
Yes. Be careful to select one to fit your seat tube. They fit using a clamp, so the chain guide needs to have the clamp diameter shaped to fit the diameter of your seat tube.
I can't recall who makes it right now but there is a "chain watcher" that sandwiches between the bottom bracket shell and the driveside bb cup and has a projection that sticks up to retain the chain. It can be used on frames with odd shaped seat tubes where a circular clamp won't fit.