Onyx Fat Bike Rear Hub

Unlike traditional pawls that click into place, the sprag clutch uses a series of sprags that wedge instantly against the hub shell. This provides virtually infinite points of engagement, meaning there is zero lag when you start pedaling, which is crucial for technical climbs or navigating loose, snowy terrain.

This hub is specifically designed for a 197mm rear spacing standard. Please verify your frame's rear axle spacing before purchasing, as this is the most common standard for modern fat bikes but may not fit older or non-standard frames.

Yes, the ceramic hybrid bearings offer significantly lower rolling resistance compared to standard steel bearings. In the high-drag conditions often found in fat biking—like deep snow or soft sand—this reduction in friction helps maintain momentum and efficiency.

This hub comes equipped with a SRAM XD freehub body, making it compatible with SRAM 11 and 12-speed cassettes. If you are running a different drivetrain system, you would need to source a compatible freehub body separately.

The hub features an adjustable preload system that allows you to fine-tune the bearing tension. This helps you eliminate any side-to-side play in the axle while ensuring the bearings spin as freely as possible, extending their lifespan and maintaining performance.

Absolutely. While it excels in winter conditions, the robust 7075 aluminum construction and titanium bolts make it durable enough for year-round use on any terrain. It is built to handle the heavy torque loads often associated with fat bike riding.