Rotor Inpower DM Road CranksetA highly accurate and reliable road crankset with integrated power measurement technology at its core. Whether you're competing, training or wanting to improve your riding, this stunning component provides all the tools you need to take your performance to the next level. Thanks to two sets of opposing gauges in its axle, this model measures your pedalling power in the left leg. As a result, you can view precise data metrics including power output, cadence, torque effectiveness and pedal smoothness. Easily connect to your smartphone or cycling device via Bluetooth Smart or ANT+ and export your data for training analysis with programmes such as TrainingPeaks.com. Thanks to its direct mount technology, a clever spline interface between the crank arm and chainrings provide superior stiffness and direct transfer of your pedalling torque.Long-Lasting Battery-Powered Power Meter CranksWith each charge lasting up to a whopping 300 hours, all powered from a standard AA battery, you'll have more than enough time to improve your pedal stroke performance. Additionally, all of its electronics are housed inside a special sealed water-proof axle for centred rotational weight and maximum device protection.Packed with features and technologies, you can access real-time performance data including Torque 360, Optimum Chainring Angle (OCA) and a recommendation of your Optimal Chainring Position (OCP). Combine this key information with Q RINGS oval chainrings to adjust your OCP in 1 of 5 different positions for fine-tuned pedalling efficiency and maximise transmission of power in your unique pedal rotation.Features: Material: 6082/7075 Aluminium Alloy Bottom Bracket Compatibility: BB30 / PF30 / PF30 BBright / BB386 / BSA / ITA / BB86 Chainline: 43.5 boost Q-Factor: 147.5mm boost Spindle: 30mm Weight: 510g (approx)Buy Rotor Components from Chain Reaction Cycles, the World's Largest Online Bike Store.