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Replacement PRECISION Powermeter cap and O-ring
adaptive training plans that sync perfectly with your new PRECISION 3+ data
and an industry-leading 550-hour battery life
The 4iiii Viiiiva is a precision heart rate monitor designed to capture the most accurate picture of your internal physiological effort
allowing you to optimize training zones and track fitness gains with total precision
4iiii PRECISION 3+ PRO Dual-Sided Powermeter - Factory Install Select Your Crank Model:Shimano - Ultegra FC-08 Replacement PRECISION Powermeter cap andThe 4iiii PRECISION 3+ PRO Powermeter is our most advanced power meter, offering the ultimate combination of dual sided accuracy, durability, and lightweight design. Whether you are a Tour de France pro, a Mountain Bike World Champion, Ironman triathlete, a Zwift racer, or a cyclist looking to analyze left right balance to optimize your pedal stroke, this dual sided crank based power meter provides the comprehensive data you need to unlock your
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