DT Swiss 350 Front Hub - 20 x 110mm DH Boost 6-Bolt Black 32H. The 350 hub is a dependable partner for every adventure. The sophisticated yet simple construction of the hub allows a low weight while providing outstanding rolling performance. Furthermore it enables cyclists not only to maintain their hubs without special tools but also to convert to the various standards. The intention behind the 350 was to create a dependable hub that supports cyclists in their independence. Contact-free seals and high precision build guarantee smooth bearings.