1. The Rear Derailleur Guard is certainly worth purchasing if your derailleur is unprotected. It Provides effective protection for rear derailleur, prevent the derailleur was struck distorti on or displacement in riding 2. The Rear Derailleur Guard is very easy to install and will actually protect the Derailleur in the event of a drop.It is Great for the kids bikes like mountain bike or MTB .Made of strong steel, very durable, suitable for most mountain bikes, road bikes, folding bicycles, racing bikes 3. The Rear Derailleur Guard is heavy-heavy and really protects the rear shifting mechanism. The guard appears to be made of a strong steel that will definitely reduce any potential damage in the event of accidents. this item is meant to fit onto the wheel axle, and not on the Derailleur nut. 4. A great investment! The Rear Derailleur Guard fits right on the axel bolt. Works great. You can put them on all the bikes after 2 of kids bikes received smashed derailleurs on the trail ride. 5. UNIVERSAL SIZE: The shape conforms to most mountain bike, road bikes, folding bikes, provides effective protection for the rear derailleur, prevent derailment.
