จาน ULTEGRA,FCR8100P,POWER,50X34T,170MM (ไม่รวมกะโหลก),มีกล่อง

Features - Shimano Ultergra Dual Sided Power Meter FC-R9200-P 12-speed Crankset Integrated design Reliable electric system Waterproof in all conditions Easy maintenance Integrated rechargeable battery Battery charged for less trouble Easily change chainrings without affecting power Clearance with frame Enough clearance with our direct mount brake caliper Accurate data collection ±1.5% accuracy of strain gage measured power in full-range Stable power measurement system at the various stepping positions Active temperature compensation Own developed strain gauge Software compensate automatically Quick response and operation without stress Possible to start quickly Simple zero reset with switch on transmitter Direct response Both left and right side connected with cable Magnet based cadence Bluetooth®LE and ANT+ Wireless firmware update system HOLLOWTECH II crankset Optimum power transfer Best balance for lighter weight and efficiency New designed crank arm Maintains high rigidity and reduces weight 4-arm construction crankset Iconic design

Use: Road Group: Dura Ace R9200 Model: FC-R9200-P Gradation: 52-36T Q-factor: 146mm Threaded BB shell width: 68 / 70mm Gear front: 2-speed Gear rear: 12-speed Construction: Hollowtech II Compatible chain: CN-M9100 HG 12-speed PCD: 110mm Chain line: 43.5mm Crank arm length (choose variant) 170mm 172.5mm 175mm