Sapim Double Square Nipple

The double square design features a square interface on both the internal and external sides of the nipple. This allows you to tension the wheel from the outside using a standard spoke wrench or from the inside using a specialized internal driver, which is particularly helpful for deep-section rims where external access is limited.

The Polyax head acts like a ball-and-socket joint, allowing the nipple to pivot slightly within the rim hole. This alignment reduces the bending stress on the spoke at the nipple exit, which helps prevent spoke fatigue and breakage over time.

Yes, these are 14g nipples designed to fit standard 14-gauge spokes. They are a direct replacement for standard alloy or brass nipples of the same gauge.

No, you do not need to add thread locker. These nipples feature an integrated mechanical secure lock system that prevents the spoke from loosening due to vibration, ensuring your tension stays consistent without the mess of liquid compounds.

7075-T6 aluminum is significantly stronger and harder than standard aluminum alloys, making these nipples a great choice for high-performance builds. While they are lighter than brass, they are robust enough for most riding styles, provided the wheel is built and tensioned correctly.