Official SUPER73 10-Speed Upgrade Kit – Full Specs & Compatibility

If you want to ditch the limitations of a single-speed setup and get the absolute most out of your motor, the official SUPER73 10-Speed Kit is the ultimate mechanical performance upgrade. Designed to give riders a wide gear range, this factory-engineered kit alters how your e-bike handles steep hills, stop-and-go city traffic, and high-speed Class 3 pedaling.

By adding a full mechanical gear cluster, you can maintain a natural, comfortable pedaling cadence at 28+ MPH instead of ghost-pedaling (spinning your legs with zero resistance).

Engineered for Seamless Integration

The SUPER73 10-Speed Kit features premium, trail-ready components configured to mount cleanly to your factory wheel and frame bosses:

• Wide-Ratio 10-Speed Cassette: Features a precision-engineered casset cluster that gives you ultra-low climbing gears for steep inclines and small high gears for high-speed cruising.

• Clutch-Equipped Rear Derailleur: Outfitted with a high-grade rear derailleur utilizing an integrated chain clutch. This dampens chain slap and prevents chain drops when bouncing over rough city potholes or technical off-road trails.

• Crisp Trigger Shifter: Shipped standard with a responsive handlebar trigger shifter that mounts neatly alongside your thumb throttle, providing instant, tactile gear changes.

Critical Frame Compatibility & Setup

Because different SUPER73 generations and frames use entirely different wheel spacing and motor configurations, pay close attention to these factory installation notes:

• Native Compatibility: 100% compatible as a bolt-on upgrade for the S2, R-Series, RX, and Adventure Series models which feature built-in derailleur hangers.

• Z-Series Limitations: This kit cannot be installed on standard entry-level Z-Series frames (like the Z1 or older standard Z-Miami models) that lack a dedicated physical derailleur hanger boss or wide rear dropout spacing.

• A-Series Note: For newer A-Series models, ensure your specific layout utilizes the classic rear hub configuration that matches the cassette splines included in this kit packaging.

Technical Specifications