Another elegant solution to your daily woes from Paul Component Engineering! The Paul chain keeper bolts onto your downtube about where a front derailleur would go and sits nicely around and over your chainring/chain. Tidy and neat, Paul's is the nicest single ring keeper we've seen. The keeper comes in the three common clamp sizes and a bottom bracket mounted version. It is very adjustable to ensure a perfect fit! Made by the master in Chico, CA.