Answers to questions asked by others.
1. We have the dual side oned P1's as well; those are moving down to the trainers
2. We just got the Vector 3 for the outdoor bikes; we got them because they are lighter, and they have Cycling Dynamics and we want to do some Qring positioning analysis.
3. They were originally purchased on in March 2017 so they have 2 seasons of indoor riding on them.
The only downside to the 1 sided reading is you can't do 1 leg guided drills on something like TrainerRoad. But for all other things, Outdoors, Trainerroad, Zwift, etc they work great. Never had a problem with them. Firmware is fully upgraded. They do require an IOS device to firmware upgrade. And if you don't have a Garmin you need an IOS to program your Crank length. If you wind up getting a set I can set the crank length for you before I ship.