WHEELS Mfg Brass Ferrules

Yes, these are designed to work with standard 4mm housing, which is the typical size for derailleur shift housing and some road brake housing. Always double-check your specific housing diameter before installation.

Brass is significantly more durable and resistant to deformation under the high tension of braking or shifting. Unlike plastic, which can crack or compress over time, these brass ferrules maintain their shape to ensure consistent cable pull and prevent housing from pulling through the stop.

The flat internal bottom provides a solid, secure seat for the housing end. This prevents the housing from pushing through the ferrule and into the frame stop or derailleur, which is a common cause of shifting issues and poor braking performance.

While 300 pieces is a large quantity intended for professional workshops, it is a great investment for a home mechanic who maintains multiple bikes or builds custom setups frequently. If you only service one bike, this will likely be a lifetime supply.

No special tools are required. They are designed to slide onto the end of your cable housing by hand. Ensure your housing ends are cut cleanly and squarely with a proper cable cutter for the best fit.