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Tuesday, 31 May 2016

How It Work? Sram eTap


Sram eTaps in the form of full wireless integration, making it the first shifting system to jettison cables. Bolt on the components, set up the limits, push a button on each to pair them, and ride away. It’s the work of five minutes.

Not only does the lack of wires make setup easy and keep the bicycle looking sharp, it also means all of the ports, battery storage spaces, straps and clips that bicycle frame makers have had to accommodate are potentially redundant.


As none of the components are physically connected, each has its own power source. Each mech has its own removable battery pack. They should be good for around 1,000km or 60 hours, and if one dies you can always swap them around to get yourself home. It also means you can carry a spare on long trips.

Glowing LED lights on the shifters and derailleurs let you know how much juice is left in each and recharge time is around an hour. The shifters run on simple coin cells that are available in any supermarket, with an expected lifespan of around two years.


While the shape of the levers will be familiar to any SRAM user, it’s also possible to run a further pair of wired satellite shifters, called ‘Blips’. These can be placed on the tops of your handlebars, for example, to allow you to shift from there, on the drops for sprinting, or at the end of a pair of aero bars to allow you to change gear without breaking position.

Lets wait and see, can Sram eTap change cycling drivetrain more simple and (i hope) cheaper in the future?


Ride On!


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