The antenna and battery cap on the non-drive crank is all you’ll see of the new INpower power meter…everything else is tucked inside the spindle.
The Rotor INPower is a clever new take on the crank-based power meter that puts all of the electronics inside the axle, which not only protects it, but keeps the rotational mass at the center.
But the location of the electronics is just part of the story. Rotor, which is known mostly for their ovalized chainrings, can show “different” power readings when those chainrings are used on standard spider-based power meters. This happens because the ovalized shape changes the zones of rotational speed at which you’re able to turn the pedals over by making it easier in your dead spots and harder in your power zones. The result, from our own experience, is that the overall pedal stroke is much smoother and the rotational speed seems more consistent to our legs, but they say a spider-based strain gauge may not see it that way.
The design also lets them use the same power meter across their entire range of cranks regardless of the arms, making it perfect for road, triathlon, cyclocross and mountain bikes…
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