The Gravity Zero X One Hub is a revolutionary high end road racing rear hub design. One of the most effieicent hubs in the world today...
Gravity-Zero wheels offer silent freewheeling and no take-up as you start pedalling thanks to a clutch mechanism that replaces the traditional pawl-and-sprocket freewheel
Conventional hubs lose torque, as there is no momentum to carry the rider's legs over the dead spots at the top dead centre and the bottom dead centre. Gravity-Zero hubs are different as the GZ hub is live from assembly so both legs work together 100 per cent of the time within your pedal strokes and each one balances out the other. Zero lag then means the momentum throws each leg over the least mechanical advantage of the cranks at top dead centre and bottom dead centre.