Zero Gravity brakes were several times updated since their launch in 2002. The latest update is definitely a new design. The parts, which offer more important thickness, should bring a higher braking power too. The ’07 version were already a very "good cru", this one will be excellent.
PezCyclingnews will publish, in the following days, an extensive article about the functionning, the settings and several extra pictures of these Negative G.
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About the weight of the brakes, they are 28 gramms heavier. This is basically not bad since they are more compact, meaning stiffer and better braking performances. They are still CNC machinned.