ROTOR INspider MTB powermeter. INSpider is a powermeter for all kind of bikes, for all kind of cyclists. INspider is a lightweight spider integrated powermeter that delivers a reliable, versatile and advanced watt measurement system. It is compatible with Q RINGS® oval rings & all ROTOR modular cranks, MTB systems.

INspider has rechargeable battery with coated electronics and strong sealing for water resistance to measure power from inside the spider. It samples combined left-right data to precisely record power output, cadence, TORQUE 360, Optimum Chainring Angle (OCA) & a recommendation of Optimal Chainring Position (OCP).