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For those cyclists that wish to train with power but are met with budget restraints, there are a couple of power measuring devices on the market that will be of interest. Although not as robust and at times not as consistently accurate (average output they are accurate if installed properly) as their more expensive cousins, these power units are the gateway device to the 21st century and training with power.
The Polar power meter features a unique measuring system to measure power. The Polar systems measure chain tension via a chain stay mounted sensor that detects vibration in the chain; similar to how a guitar string “hums”, a chain vibrates faster as its tension increases. This translates into an amount of force, which is then multiplied by chain speed, as measured by a sensor mounted on the rear derailleur, to come up with power output: Power (in watts, or W) = chain tension (N) times chain velocity (in meters per second, or m/s). If installed correctly, the Polar can be an accurate beginner power meter.
The iBike Pro power meter needs no special wheels, hubs or cranks making it easy to transfer to any bike. The lightest power meter weighing in at 62 grams. The iBike Pro power meter delivers precision and innovation at a fraction of the cost of the competition and is a great beginner power meter with a simple user friendly screen and easy to navigate programming. Not as robust as the competition, this new player on the power meter market is one to watch.
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