Tri-pack A clutch in derailleur for enhanced drivetrain reliability on aggressive terrain
11-50T wide cassette range enables smooth shifting across varied conditions
Prime 9 technology ensures long-lasting durability and consistent performance
Compatible with wide and narrow chainrings for versatile gear options
Quick-shifting shifter action for responsive control
Summarized by Shop
Our Box Two tier's mission in life is to deliver performance similar to the Box One but without its exotic (and costly) features. You still get the Tri-Pack™ Clutch in our derailleur only it isn't adjustable. The cassette's 11-50T range is equally impressive but we don't cut it out of a single block of steel. The action on the shifter is
Cassette
11-50T
Rear Derailleur
Prime 9 X-Wide
Shifter
Prime 9 Multi Shift
Chain
126L
Support Material
Steel
Compatible Chainrings
Wide and narrow
Summarized by Shop
4.4
24 ratings
5
4
3
2
1
Simple, robust and easy to install
A
Asher · May 4, 2026
Took some time getting it dialed in. Once that was done, everything works great.
K
Kelly · November 24, 2025
Shifter was faulty and has to be replaced. But otherwise, I like the group set and gearing.