• 1309 Series Sonic Hub
• Bore: 4 mm
• Material: Aluminum
• Finish: Clear Anodized
• Machined for high-precision fitment
• Allows you to mount components to a 4 mm diameter shaft

The 1309 Series Sonic Hub (4mm Bore) allows you to mount components to a 4mm diameter shaft. The innovative Sonic Hub design is perfectly balanced.

It will not introduce vibrations into your build, even in high-speed applications. This hub is machined for high-precision fitment. The body of this hub is aluminum, and the pinch bolts are zinc-plated steel. Aluminum has an excellent strength-to-weight ratio, allowing this hub to be both light and strong.