This was a great power meter when I used to race triathlon. Good connection, accurate info and reliable. Only 300 miles on it and has NEVER been used in the rain (I never washed the bike either) and has never been in an accident. This is the complete FSA Gossamer Crankset. Pedal length is 170mm and fits 5x110 bolt circle chainrings. Tech data below is from POWER2MAX site Thanks for looking. Will need a new coin cell battery which is cheap to find locally or online. Sold as is. Technical data BCD IN MM: 110, WEIGHT POWER METER: 110: 162g, WEIGHT POWER METER WITH CRANKS: 110: 765g, CHAIN LINE: 45mm Q-FACTOR: 151mm CRANK AXLE DIAMETER MM: 30 CRANK LENGTH IN MM: 170, Installation tips TO MOUNT THE RIGHT CRANKARM TO THE POWERMETER YOU WILL NEED THE LOCKRING TOOL FOR FSA, CANNONDALE AND SPECIALZED CRANKS WE RECOMMEND USING LOCTITE 243 OR A DIFFERENT MIDDLE STRONG THREADLOCKER compatible bottom brackets BB30 PF30 BB386EVO BB86 BBRIGHT BSA68