The SRM transforms any bike into a mobile ergometer.

You get instant feedback on your Power, along with Heart Rate, Speed, Distance, Time, and Cadence.

All of this is downloadable to your PC or MAC. Yes, you are right, we have a way to download this to a Mac.

Definitly one of the best investments you can make in your cycling.

Right crank arm alone is 132g heavier than a Campagnolo Record aluminum crank. System is 220g heavier than a bike equiped with standard cranks and no computer.