DT SWISS 350 Ratchet System 18, the 350 hub is designed with the belief of "simple and reliable". The ratchet teeth occluding synchronously to form a large area of force, which is the key to its durability. The unique press-fit design of the hub makes maintenance without additional tools. In addition, the conversion of mandrel specifications or the change of occlusal angle can be easily completed in a few simple steps.