If you're riding a Ridley Compact or Phaeton road bike or an X-Ride cyclocross bike, then this is the replacement derailleur hanger that you'll need in your spare parts bin at home. Accidents happen. We all know that. And as a vulnerable area of the bike, a replaceable hanger takes the brunt of the force when your bike goes down. Replaceable hangers are inexpensive, and in bending or breaking one, it's likely to save your frame from damage. The Ridley Compact/Phaeton/X-Ride Derailleur Hanger comes with two fasteners, and installation is easy enough to do in a few minutes.