I can say based on experience that yes they are light , better braking no different , the major issue is the return spring replaced twice spring is weak and some of the hardware will start to rust after a few wet rides or cleaning . This is based on the Cat brakes , so I do not know if these issues have been corrected on the Zero gravity models . I have heard the same things from some other users . Other then those issues they are super light but that comes at a cost . Worth it for a climbing bike I guess .