Six years of development, and a crowdfunding target smashed in less than 24 hours. That’s the story behind the Brim Brothers Zone DPMX power meter, the world’s first wearable power meter, which measures power and cadence by attaching to your shoes and cleats.
The system, which must be the most portable power meter on the market, uses two seperate sensors to measure power and cadence. The power sensor is located between your cleat and your sole (although unfortunately it’s only compatible with Speedplay cleats and pedals at the moment), while the cadence sensor is attached to one of the straps on your shoe, and it will work as either a single-sided or dual-sided system.
However if you’re after accuracy over convenience then there be better options out there, with Brim Brothers giving a claimed accuracy of ±2 per cent, so not quite up there with the admittedly much more expensive options from SRM and Verve. Battery life could also be a bit of an issue, with a claimed life of 15 hours at 20ºC, so you’re probably going to have to recharge them every week or so.
As well as power and cadence, the Brim Brothers Zone DPMX will also measure torque efficiency and pedal smoothness, bringing it up to the standards of much more expensive power meters, while the dual-sided version will also measure your left/right balance.
In terms of pricing, the single-sided Brim Brothers Zone DPMX Single is currently available on Kickstarter for €390, approximately £300 (plus tax and shipping), while the dual-sided option is €780, or £605, making this one of the most affordable power meters on the market.