1. - During riding, you may often notice delayed shifting or even skipped gears. Maybe your gear cable is fraying and looks badly worn? If so, it's time to upgrade and replace your shift cables and cable housings. Choose from a variety of gear cable housing colors to match your bike. Each set includes the shift cables and gear cable housings for front and rear gears as well as clips, ferrules and cable end crimps. 2. - Like your brakes, your gears need to be responsive and instant. For the most responsive shifting, Cycles uses 1.1mm stainless steel PVC : : : : : : : : : : : : : : : inch or 10.5 cm, 2.4 inches or 6 cm wide, 1.4 inches or 3.5 cm high. 2. Universal derailleur guard, thickened steel rear derailleur gear protector is suitable for various bicycle models, for example, suitable for most mountain bikes, road bikes, folding bikes, racing bikes. 3. The installation is very simple, just fix it in the corresponding hole position. 4. Provide effective protection for the rear derailleur to prevent the derailleur from being deformed or displaced by impact during riding.