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The RMP² insoles could lead to a new generation of versatile power meters.
The advancement and development of power meters may be the fastest growing gear segment in the multisport industry, and a new company called RPM² (Remote Performance Measurement and Monitoring) is aiming to revolutionize the category with an insole-based system that has sensors embedded in the inserts to monitor the distribution of pressure on the sole of each foot.
When used in cycling mode, the insoles provide power data for each leg and can even identify if your foot is pronating or supinating through your pedal stroke. There are several advantages to an insole-based power system (over a hub- or crank-based power meter), such as the ability to easily swap the inserts between shoes. The price—ranging from $700 to $750—also makes it one of the cheapest power-measuring products available.
RPM² also has run functionality, which measures ground contact time, flight time, cadence and sequential force strike, which shows where you land on your foot as well as how much you pronate. The insoles measure bilateral range of motion to analyze ankle dorsiflexion, knee extension and hip flexion and extension. The system works through an app on your phone and has the goal of improving efficiency by revealing imbalances.
Weighing about as much as a racing flat, these insoles should be considered a training tool and probably not something you’d use on race day. Another drawback is the lack of ANT+ connectivity, so you can currently only pair it with your phone. Battery life is about five hours and it takes 45 minutes to recharge each insole using an included charging mat.
Our wish list of refinements: a sleeker design and ANT+ connectivity (which RPM² is close to launching). Even without those additions, RPM² has developed a unique tool that could lead to a new generation of versatile power meters to help athletes further optimize their training.
RPM2 Insoles ($700–$750)