Vario Dropper Post Lever crank Helix R 12s clusters are

Helix R 12s clusters are backward compatible with and can be used to upgrade your existing TRS+ 9-50 cassette

Tool to install and remove e*thirteen BB's (except BB92)

but they're equally at home on any MTB if strength and reliability are at the top of your priority list

SL Chainrings are not compatible with Helix cranks

and these replacement parts are designed for use with 9-34t

Vario Dropper Post Lever crank Helix R 12s clusters areThe Vario Dropper Lever is the perfect complement to our new Vario Infinite Dropper Post.. or any cable actuated dropper seatpost! The angle adjustable paddle pivots on dual cartridge bearings allowing for a smooth and light action, while grip tape on the paddle ensures no slip operation. The Vario lever is topped by a durable aluminum body. It's Matchmaker compatible, and perfectly integrates with all common brake levers. The Vario body allows for