The Parabox rear caliper
The Parabox junction box master cylinder clamps onto the handlebar stem, just beneath the bars
Parabox is a system that lets cyclo-cross racers add hydraulic disc brakes to their existing rim-brake-equipped bikes
About a year and a half ago, the International Cycling Union – the organization that sets the rules for bicycle racing – announced that it would allow the use of disc brakes on cyclo-cross bikes. This was good news for off-road racers, who were willing to accept the slight weight penalty of disc systems in exchange for the performance advantages that they offer over traditional rim brakes. As a result, we’re now seeing various disc-equipped competition-level cyclo-cross bikes entering the marketplace. However, what does this mean for all the perfectly-good bikes out there that were made before the announcement? Well, it turns out that they can be converted to hydraulic discs, thanks to something known as the Parabox system.
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