With the introduction of electric mountain bikes, riders can go farther and faster than ever before. Created from research undergone when TRP designing a brake for five-time UCI World Cup Champion Aaron Gwin, and adjusting the technology for eMTB, the HD-e840 offers unparalleled performance for eMTB riders. The all-new HD-e840 utilizes a completely new design to offer a brake engineered specifically for eMTB. Standard mountain bike brakes use a 1.8mm thick rotor to offer the balance of weight, performance, and heat management. However, with weight being a less predominant factor in e-bikes, rotor thickness was expanded to 2.3mm – lowering heat buildup by 8% and reducing rotor deformation by 15%. The new caliper is designed specifically around 2.3mm thick rotors. The caliper utilizes an open top design for easy pad replacement when working with the added weight of an eMTB. The caliper also features TRP’s World Cup-winning hybrid pistons offering the ideal blend of lightweight heat management and smooth reliable actuation. The lever is equipped with an indexed Tool-Free Reach Adjust and the same Aaron Gwin-designed lever blade found on the World Cup winning brake.

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