SRM - Schoberer Rad Messtechnik - was founded by engineer Ulrich Schoberer in 1986. Prior to this the qualified medical engineer had spent many years thinking up and experimenting with ways to measure an athlete's power output on the pedals under real conditions during an actual ride.
Up until the eighties, no adequate method had been found to measure performance on a bike in training or racing, you still had to rely on lab testing instead. This meant that athletes were forced to go back and forth between their real performance - cycling on the road or cross country - and the ergometer in the lab. With lab testing, they still couldn't tell how their performance had changed over a period of a few hours, either in a race or in training. Lab testing was an intermittent check-up, at best, but couldn't tell athletes anything about how they were performing day-to-day. And the most important performance - during competition - couldn't be tested.
It wasn‘t until Ulrich Schoberer developed and patented the SRM Training System that it at last became possible to measure power in watts while cycling. SRMs measure the only aspect of training that is absolute, POWER, which isn't affected by the kinds of influences, like weather conditions (temperature, wind) you see when you measure physiological variables such as heart rate or speed. Even better, pedalling power is measured at the point where output really occurs, on the special crank, the SRM Powermeter.
Campagnolo designed an Ultra Torque™ crank arm specifically for the SRM PowerMeter featuring an opening to access the retaining spring of the bottom bracket. The cranks will be available in 170mm, 172.5mm, and 175mm with a Q-Factor of 145.5mm. The Ultra Torque™ is Campagnolo’s offering in the integrated crankset sector presenting “lightness, rigidity, and efficiency of power transmission.” With technology containing CULT™ (Ceramic Ultimate Level Technology) the SRM Campagnolo Powermeter will demonstrate maximum smoothness and wear resistance. The Bissell Pro Cycling Team and SRM Campagnolo PowerMeter users will also benefit from Campagnolo’s X.P.S.S™ shifting system (Extreme Performance Shifting System) guaranteeing superior speed and precision.
Technical Specifications PowerMeter:
- Crankset: Campagnolo Ultra Torque™ 11-speed crankset with CULT™ bearings and stainless steel axle,170mm - 175mm
- Bottom Bracket: Campagnolo CULT™ bearing (included), bottom bracket cups not included
- Chainrings: Campagnolo Standard 53/39 11-Speed (135mm BCD)
- Weight: 779-786 grams (includes SRM PowerMeter, Campagnolo cranks, chainrings, and CULT™ bearings)
- Accuracy: ± 1.5% *Displayed power reading
- Battery Life: 1,400h