Left crank with 3+ power sensor Ultegra R8100 GRX

The PRECISION 3+ power meter, our most powerful unit to date, housed in a smaller and lighter case and supporting Apple Find My, is a proven choice for professionals and seasoned amateur cyclists. Whether you're battling for a qualifying spot in Kona, spending countless hours on virtual platforms, or aiming to improve your time on your local giant, you need precise and reliable tools to unlock your full potential. With up to 800 hours of battery life, an automatic terrain selector, and an accuracy of +/-1%, the PRECISION 3+ power meter will be your trusted tool for years to come.