They hold onto the bars better than any other non lock on grip too

Designed for maximum ride quality with a 31

Specialized Stumpjumper 6Fatty 2016

designed specifically for Mountain Biking

Wolf Tooth Boostinator Hub Adaptors - HF - Front Envelope Shipping They hold onto the barsJust got a Boost Frame or Fork and need to get your standard hubs to fit? Enter the Boostinator! CNC Machined In the USA from 6061 Aluminium and anodized to ensure longevity, the Boostinator allows non Boost wheels to be mounted in Boost frames and forks while allowing brakes and derailleurs to function as designed. Once you've installed your Boostinator generally about 5 minutes, you'll need to re dish your wheel which will improve the spoke bracing