Rotor 3D Comp Power2Max powermeter, 175mm cranks, with 39x53 rings and it's the 24mm axel model so runs on a standard Shimano BB. I've had this for 5 years and never had a issue with the numbers from it, always the same offset when connecting to my Garmin, never lost a signal when in use. The only problem I had with it was one of the inserts for the battery cover pulling out, this has been glued in and some residue can be seen on the battery cover. The only reason for selling this PM is it was on my TT bike, which I am selling and I ride shorter cranks on my road bikes
