BOX Two Prime 9 Speed Twin Lever Shifter - Black - Multi Shift - 22.2mm Bar Clamp - 9 Speed PDP|PLP|Brake Rotor Type If you replace your chain

If you replace your chain early enough you will prevent premature wear to your cassette and chain ring

8mm and 35mm versions

They come with an elastic waist so can be adjusted

they are not cross compatible

Quick link storage

BOX Two Prime 9 Speed Twin Lever Shifter - Black - Multi Shift - 22.2mm Bar Clamp - 9 Speed PDP|PLP|Brake Rotor Type If you replace your chainBox's goal with Prime 9 was to blend all the durability and reliability from a traditional 3x9 drivetrain with a 1x setup. Box Two is the performance middle tier option within the Prime 9 lineup. With Prime 9 you still get the wide range offered on competing 12 speed setups, but with fewer shifts required to go up and down the gear range. The Box Two shifter maintains all the great functionality of the Box One but forgoes the 1 piece pull lever from