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Used to pace attacks up the Alpe D’Huez in the Tour de France and to hammer on the Queen K during the Ironman World Championships, the PRECISION powermeter delivers industry leading accuracy and reliability when you need it most. Through the patented 3D strain gauge technology, you have the assurance knowing that the data you depend on will help lead you to your own Yellow Jersey. Packaged into a durable lightweight design and compatible with ANT+ and Bluetooth Smart head units, PRECISION will help you train harder and smarter. A ride-ready PRECISION includes and comes preinstalled on a brand-new Shimano crank arm of your choice. These crank arms will fit bottom brackets using the Hollowtech II interface.
NOTE: check your frame clearance before ordering by downloading and printing the compatibility guide:
3D powermeter technology (patent pending) measures tri-axial strain on your crank arm
Accurate, consistent data
Lightweight, compact design
Battery status indicator via 4iiii app
Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
User-friendly app and configurable rider compensation scale factor
Easy setup and maintenance
Data accuracy: +/- 1% error margin
Battery life: 100+ riding hours on 2032 coin cell battery
Weight - adds only 9 grams to the left hand crank.