4iii Shimano Ultegra 8000 PRECISION 3+ Left-Side Power Meter

What Our Gearhead® Experts Are Saying:"The PRECISION 3+ Powermeter has completely changed my approach to training. Its unparalleled accuracy ensures I trust every watt while the Apple Find My compatibility gives me peace of mind when I travel to events or train outdoors. Plus, with up to 800 hours of battery life, I can ride worry-free for months."Every ride starts with a goal—sometimes it's conquering new terrain, other times it's hitting a PR. The PRECISION 3+ Powermeter, crafted by 4iiii, is the key to unlocking your potential on the road, gravel, or indoor trainer. This featherlight device doesn’t just measure your watts; it builds trust with +/-1% accuracy using three strain gauges, ensuring no pedal stroke is left unaccounted for.Its thoughtful design includes an ultra-low profile for compatibility with more frames and Find My integration for worry-free rides anywhere. Even in extreme weather, it holds up with IPX7 waterproofing and a robust build tested on challenging courses like Strade Bianche. With up to 800 hours of battery life and an automatic terrain selector, it’s not just a tool—it’s your riding partner.