Or, going in the complete opposite direction, the Onyx Vesper is quiet as a church mouse with its sprag clutch that disengages from the freehub when coasting but instantly engages when you start pedalling. In the DT Swiss 350, you’ll find their star ratchet system, while in the Industry Nine Hydra, there’s a ratchet and pawl system that drowns out every other sound on the trail. Inside of that hub shell sits one of a few kinds of systems to let your freehub spin freely in one direction but lock into place when you put the pedals down. At the heart of those expensive hoops and rims we’re spinning on sits our hubs.Īlways a silent assassin in the front but with a range of mannuerisms in the back, the rear hub is what we’re exploring today.