In high-performance cycling, the smallest details often have the biggest impact. Enter the black anodized alloy open end cap—a precision-engineered component that may look modest but plays a vital role in preserving the integrity of your drivetrain. When you reach for a bottle of 50 of these caps, you’re not just finishing cables—you’re sealing performance, protecting control, and delivering that final professional touch that separates routine builds from exceptional ones.

Designed specifically for 4mm outer casing, these open end caps allow your inner cable to glide through freely while firmly anchoring your housing. That’s critical in indexed shifting systems where micro-adjustments define performance. A sloppy finish can compromise alignment, trigger friction, or allow housing to mushroom at the end—all of which can ruin a finely tuned drivetrain. These alloy caps eliminate that risk, offering a solid stop that reinforces every shift with mechanical stability.

The material choice matters: unlike plastic variants that deform or split under load, these are forged from lightweight yet strong aluminum alloy, machined for a perfect fit, and anodized in deep black. The result is a finish that resists corrosion, blends seamlessly with modern aesthetic builds, and holds its shape even after repeated installations or hard use. They’re tough enough for gravel grime, mountain bike abuse, or everyday urban grit—yet refined enough to grace the cockpit of a carbon superbike.

The open-end design is optimized for modern drivetrains, offering minimal cable resistance and easy threading, without sacrificing housing support. They're the ideal finishing solution for use at derailleurs, barrel adjusters, or any exposed cable interface where function and form need to work in harmony.

Each bottle contains 50 pieces—enough for multiple bikes or high-volume maintenance days. The compact container is workshop-friendly, keeps your parts organized, and ensures that you're always ready for quick replacements or full re-cabling jobs. Whether you're working in a pro team pit, managing a bike rental fleet, or assembling boutique builds, these caps keep you moving efficiently without compromising quality.

Think of them not just as hardware—but as silent protectors of cable longevity, guardians of smooth shifting, and subtle contributors to the bike’s final aesthetic.

In every rotation of the crank and click of the lever, these black anodized alloy end caps stand quietly behind the scenes—doing their job so the ride can shine.