Upgrade your Shimano XTR M9200 groupset with the most advanced power meter available today. The 4iiii Precision 3+ delivers exceptional accuracy of ±1% and is fully integrated into a 170 mm left XTR crank arm. Thanks to its ultra-thin profile, it fits virtually any frame. New to the 3+ series is Apple Find My integration, allowing you to always locate your power meter (and therefore your bike) via your iPhone or iPad. With a battery life of up to 800 hours and robust IPX7 waterproofing, you’re ready for any XC race or marathon.