So, I'm looking at adding a left arm crank power meter to my gravel bike. I use power pedals for road and tri but that's obviously not good for gravel/cross cycling. I can't find any GRX crank in stock for 172.5. However, there are plenty of 105 and Ultegra cranks. Will an Ultegra or 105 crank work with my GRX 600 crank set?
https://www.strava.com/athletes/23685202
https://www.strava.com/athletes/23685202