Keep your rear derailleur out of harm’s way with this CR-A27 rear derailleur guard from XLC. It is easy to overlook protecting your derailleur. Still, with bicycle components becoming increasingly expensive, it is definitely worth looking after. The rear derailleur guard mounts to the bike and offers a layer of protection from knocks and crashes for your derailleur. It is specially designed to work with long cage derailleurs and is manufactured using high tensile steel. This type of steel uses lower blends of alloys and thus has a greater level of tensile strength than other materials. The cage hangs over the top of the derailleur and thus protects it from bumps and scratches, which we all know can happen anywhere.