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By zeroing in on your ride metrics the PowerTap SL actually puts you more in-tune with your body. Thanks to perceived exertion, you'll always know when you feel great or so, but now you can attach real numbers to those feelings.
By understanding where you need to be for a great ride every time, your training actually becomes easier and more focused. And because cadence is measured by torque not with a separate sensor the computer is 100% wireless, easy to install and can be moved from bike to bike for collecting data even when you train on multiple bikes.
Training to be the best is hard work, but you can make it easier by training smart. With continuous data recording for current, average and max power and speed, current and average heart rate and cadence, total energy expenditure, ride distance and ride time, there will be no questions unanswered at the end of your ride. Except by the people you beat.
Once you're off the bike, simply download the data via USB cable to your computer and use the included PowerAgent software to analyze your ride metrics, investigate interval stats and track your improvements over time.
With a +/- 1.5% accurate measure of performance, PowerTap is your secret weapon in making quantifiable progress in your training.
Please note: If/when you need to replace the hub's battery, we suggest you get a Duracell 303/357 siver-oxide (not alkaline). It meets PowerTap's specifications, and will last the longest, in our experience.