Jagwire Open End Caps

These caps are designed to adapt 5mm housing so it fits securely into 4mm frame stops or derailleur ports. They act as a bridge, ensuring your cable housing stays seated correctly for consistent shifting.

No, these are simple open-end caps made from chrome-plated steel. They do not feature internal o-rings or nylon liners, making them a straightforward, durable solution for standard cable setups.

These are specifically designed for shift housing. Because they are open-ended and sized for 5mm-to-4mm transitions, they are not suitable for the higher compression forces found in brake systems.

Steel caps offer superior durability and structural integrity compared to plastic alternatives. They are less likely to crack or deform under pressure, providing a more secure connection that helps maintain precise shifting performance over time.

While the 100-count pack is optimized for shop efficiency, it is a great investment for home mechanics who frequently maintain multiple bikes or perform regular cable replacements. If you only need a few caps, this might be more than you need, but it ensures you will always have spares on hand.