• With several years of development and working closely with professional teams you can expect extreme accuracy from Shimano’s first fully integrated power meter HollowTech II 11-speed Dura-Ace chainset
• Accurately calibrated strain gauges are integrated inside both left and right crank arms, this offers a stable measurement system through rotation from both sides for extremely precise data
• +/-2% accuracy of strain gauge measured power
• Bluetooth and ANT+ with wireless firmware update and data acquisition system
• Easily rechargeable integrated battery with fully waterproof reliable electric system
• These industry leading HollowTech II cold forged hollow crank arms have evolved to increase rigidity, keep weight low, and improve strength
• There is a wide range of Dura-Ace chainring ratios available seperatly
• HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency
• Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability

Occasionally, without notice, manufacturers change product design and/or specifications.