Box Two Prime 9 X-Wide Rear Derailleur Size:X-Wide Cage See the comparison chart -

See the comparison chart - the data speaks for itself

Our unique inner link spacing is engineered to grab those modern wide/narrow chainrings

The chain boasts the same unique ability to mate with a wide/narrow chainring except you give up the trick DLC top coat

This simplification makes any cockpit clean and tidy by integrating 2 clamps into one

The Box Three shifter makes good use of nylon composites in both top and bottom shells as well as the levers

Box Two Prime 9 X-Wide Rear Derailleur Size:X-Wide Cage See the comparison chart -The Box Two Prime 9 Rear Derailleur is very similar to the Box One version however, to be more wallet friendly, it offers a non adjustable Tri Pack Clutch, bushing pulleys and some muted finishes. Box Two rear derailleurs are still optimized for 11 50t cassettes and offer durability and performance for the most demanding terrain, just at lower price! IMPORTANT NOTES Prime 9 Technology View Prime 9 Drivetrain Compatibility Manual How is the Ebike