The Shimano FC-R9100-P Dura Ace double Power Meter Chainset has accurately calibrated strain gauges which are integrated inside both left and right crank arms. This provides a stable measurement system through rotation from both sides for extremely precise data.Shimano FC-R9100-P Dura Ace double Power Meter Chainset Features+/-2% accuracy of strain gauge measured powerBluetooth and ANT+ with wireless firmware update and data acquisition systemEasily rechargeable integrated battery with fully waterproof reliable electric systemHollow outer chainring, giving vast improvements in rigidity and increased weight savingsThe hollow outer chainring has essentially removed outer chainring flex, hugely...
Best Price: £1199.99 from Leisure Lakes Bikes