Making a start in SRM-power output measuring. With the amateur system developed especially for the ambitious road cyclist. The watertight Powermeter is based on the particularly robust round housing made of hot-cured 7075 aluminum that has stood the test of time in thousands of racing bikes. It is available for both the square and Oktalink sealed bearing and can be equipped individually.

Accuracy of measurement: equipped with two strain gages the Amateur Powermeter provides data with an accuracy ratio of +/- 5%

7075 aluminum crank and chainrings, cranks are available in lengths of between 165 and 180mm

Compatible with Shimano Octalink Dura Ace (9-fold until 2002 model) and Ultegra (9-fold until 2003 model), and Campagnolo square sealed bearing

Chainrings:
5-arm with 130mm bolt circle diameter. Small chainring available with 38 to 46 cogs, large chainring available with 50 to 61 cogs, Standard version: 39/53, in principle all nine and ten-gear models are compatible (see above for exceptions)
Weight from 827g