What is DRS? This is a system designed and patented by Vocal, it is a system that allows you to add drag to your cranks to stop them turning when you take your feet off. This system works with a simple plastic drag plate that runs on the outer face of the bearing.
Buy Vocal Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.More information on returns