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, the system works with
a simple plastic drag plate that runs on the outer face of the bearing.
The system can be adjusted to suite the individual rider style,
so no more searching for your pedals when you do a tail whip they
will be exactly where you left them.
Mid bottom bracket bearings Tube spacer with removal slot and adaptor tube for wide and narrow frames ( fine tune washer kit) 22mm Driver side alloy bearing cover DRS System 3 screw adjustment, drag washer for non driver side 2x CNC alloy 3mm spacer shims Allen key short reach