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| | Encyclopedia :: encyclopedia : Bicycle (Site not responding. Last check: 2007-10-01) |
 | | However, since hydraulic disc brakes usually require relatively specialized tools to bleed the brake systems, repairs on the trail are difficult to perform, whereas mechanical disc brakes rarely fail. |
 | | Also, the hydraulic fluid may boil on steep, continuous downhills. |
 | | This is due to the brake losing its ability to transmit force through incompressible fluids, since some of it has become a gas, which is compressible. |
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