SUPER73 10-Speed Conversion Upgrade Kit – Shimano Zee Drivetrain

Conquer Hills and Dominate Varied Terrain Take total control over your ride profile with the official SUPER73 10-Speed Conversion Kit. Standard heavy-duty single-speed configurations are great for flat urban boulevards, but when you hit steep inclines or mixed gravel paths, your pedal input loses mechanical advantage. By expanding your rear hub to a wide-range 10-speed cluster, this kit vastly improves pedal-assist efficiency—allowing you to comfortably contribute human power on tough climbs and maintain a natural pedaling cadence at high top-end speeds.

Premium, Race-Proven Shimano Zee Hardware At the heart of this upgrade package is the heavy-duty Shimano Zee Short-Cage Rear Derailleur paired with a responsive right-hand handlebar trigger shifter. Built specifically for down-hill racing and aggressive riding, the Zee platform utilizes Shimano Shadow Plus RD technology. This integrates a switchable mechanical clutch chain stabilizer directly into the derailleur pivot. When engaged, it keeps the chain under constant tension, completely eliminating chain slap against your frame and ensuring precise, crisp gear tracking even when bouncing down bumpy backroads.

Seamless Architecture Integration Every item in this kit has been meticulously engineered by SUPER73 to seamlessly interface with their full-size sport chassis models without frame modification. The kit replaces your stock, straight-line cranks with a custom-offset chainring assembly to ensure ideal chainlines across all ten gears, while discrete bottom bracket and cassette spacers maintain factory clearance.

SPECIFICATIONS & PERFORMANCE BREAKDOWN

• Retail Price: $265.00

• Derailleur System: Shimano Zee Short-Cage Rear Derailleur

• Clutch Technology: Shimano Shadow Plus RD (Built-in mechanical chain stabilizer switch)

• Cassette Profile: 10-Speed Cassette (11-36T range)

• Shifter Setup: Right-hand handlebar trigger shifter (Zee indexing)

• Chainring: Custom Offset Chainring (44T)

• Cranks: Left (Non-drive) and Right (Drive-side) heavy-duty crankarms included

📦 What’s Included in the Box

This is a comprehensive, all-inclusive drivetrain retrofit package containing:

• 10-Speed Cassette (11-36T) & custom cassette spacers

• Shimano Zee Short-Cage Rear Derailleur

• Shimano Zee Right-Hand 10-Speed Trigger Shifter

• Shifter cable, protective housing, housing end caps, and cable crimp cap

• Custom-offset 44T chainring with Left & Right side replacement crankarms

• Upgraded 10-Speed Bike Chain (136 Links, including connector pins)

• Bottom Bracket (BB) spacers for exact chain alignment

Vehicle Compatibility Matrix

⚠️ Installation Notice for Storefront: This component package requires advanced mechanical assembly, specific bicycle chassis tooling (such as a cassette lockring tool, chain whip, crank puller, and chain breaker), and precise derailleur indexing adjustment. Professional installation by a local cycle mechanic is highly recommended to guarantee vehicle safety and prevent driveline component damage.