FSA  Powerbox Powermeter Carbon Road ABS Chainset - 53 x 39 - 170mm

Features: Hollow carbon arms with UD carbon finish 386Evo 30mm AL7050 alloy axle fits every frame (purchase BB separately) AL7075 100% CNC chainrings AL7075 Torx T-30 alloy chainring bolts Fits Shimano and Sram 10-11 speed systems UD carbon finish Weight: 585g Power2max Features simple2use Auto Zero: every time you stop pedalling for 3 seconds or more your power2max re-zeros , no need to re-zero manually. No cadence magnet needed: you don't need to install a cadence magnet on your bike. Your power2max calculates cadence precisely using its internal accelerometer. Batter change: when the time come to change your battery - after 300 to 400 hours of use (6,000 to 12,000km) - you can do it yourself. ±2% Precision Power2max power meters deliver state of the art data: they achieve an accuracy of ±2% or better including all environmental influences. power2max power meters achieves this accuracy through a refined design and high quality manufacturing processes. *Designed, engineered and made in Germany* Power2max manufactures the power meters in Germany with the highest quality production standards. *ANT+* Power2max power meters use the ANT+ standard to transmit data wirelessly to your bike computer. The ANT+ standard guarantees reliable transmission and offers a large number of bike computers to choose from. *Bluetooth ready* Power2max FSA power meters are Bluetooth ready and can be upgraded to transmit the data wirelessly not only with ANT+, but also via Bluetooth communication (with purchase of firmware upgrade). *Upgradeable* Power2max FSA power meters can be upgraded to have the software feature of left-right balance