While the best road bike groupsets - as well as the upper tiers of Shimano ... derailleurs all come with a quoted maximum sprocket size for a rear cassette. If you wish to install a larger ...

On the rear derailleur, find high and low limit screws (labeled H and L). They control how far the derailleur can move. Tighten the H screw on the rear derailleur until the chain does not click as ...