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We make two Cable Doublers. The first allows you to control two brakes with just one lever. The second allows you to control one brake with two levers. Why? Well, there are myriad applications: cyclocross, fixies, tandems, bike polo, tricycles, recumbents, cycles for those with special needs, those four-person bikes you see on beach boulevards, and so on. You could even link them both together for ultimate redundancy!
Use Problem Solvers Cable Doublers to pull two brakes with one lever to customize and tweak different braking applications. Especially handy for tricycles, bike polo, adaptive cycling applications, triathlon, tandems or other bike oddities.