Used to pace attacks up the Alpe d'Huez in the Tour de France and hammer on the Queen K during the Ironman World Championships, the Precision power meter delivers industry leading accuracy and reliability when it's needed most. Packaged into a durable lightweight design and compatible with ANT and Bluetooth Smart head units, Precision will help riders train harder and smarter. A Ride Ready right-side Precision includes and comes preinstalled on a brand-new Shimano crank of your choice. These crank arms will fit bottom brackets using the Hollowtech II interface.

4iiii's patented 3D Strain Gauge technology