Wheels Manufacturing Cable Housing Ferrule

Yes, these are designed for standard 5mm brake cable housing. They are not compatible with 4mm derailleur housing, which requires a smaller diameter ferrule.

The flat internal bottom provides a solid stop for the housing to rest against. This prevents the housing from pushing through the ferrule and into the brake mechanism, which ensures consistent, reliable braking performance.

No, these are specifically sized for brake housing. Derailleur housing is typically 4mm in diameter, so these 5mm ferrules will be too loose and will not provide the necessary secure fit.

While you technically can reuse them if they aren't deformed, it is best practice to replace ferrules whenever you replace your cables or housing. Using fresh ferrules ensures a clean, tight fit that prevents cable slop and keeps your braking responsive.

No special tools are required. You simply slide the ferrule onto the end of your cut brake housing before inserting it into your brake levers or frame stops.