Ferrules cap the cut ends of cable housing where it meets frame stops, shifters, and derailleurs. Without them, housing ends can fray, compress unevenly, or pull back from the stop under cable tension, all of which compromise shift quality. The 4mm Cable Ferrules from Jagwire fit standard shift housing diameter and provide a clean termination that seats consistently against stops and barrel adjusters.

These open-style ferrules use nylon construction without internal o-rings or sealing elements. The open design works well for shift systems where low friction matters more than weather sealing, and the nylon material resists deformation while staying lightweight. They slide over freshly cut housing ends and hold their shape through repeated cable actuation.

The 10-pack covers a typical shift housing installation with spares left over. If you're replacing cables and housing on a 2x drivetrain, you'll use four to six ferrules depending on frame routing, so a single pack handles one complete job with extras for the parts bin. Stock a few packs and you won't need to delay a build waiting on small parts.