PowerTap is the second most established power meter manufacturer and entered the market as a more affordable alternative to SRM.
It’s a unique design with the power meter built into a rear wheel hub and said to be accurate to within +-1.5 per cent. PowerTap’s hub-based design means you can easily switch the wheel – and, therefore, the power meter – between bikes in a flash, though you are limited to that wheel for both training and racing (unless you buy two or more PowerTaps, of course).
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PowerTap significantly dropped its prices in August 2013, with the G3 hub, said to weigh 325g, now £699, while many wheel manufacturers (including FFWD, Zipp and Mavic) offer pre-installed PowerTap builds. Like SRM, PowerTap is compatible with its own Joule computer, as well as any ANT+ unit.
Pros: Easily moved between bikes, price drop, user-friendly
Cons: Limits wheel selection when training and racing
Website: PowerTap