I've run pegs on an Odyssey Hazard v3 with a chromoly female axle for years without any issues. 15mm axle with 3/8" bolts. Guessing the Profile axle is a similar diameter, but their bolts might be a little weaker if they're still using coarse thread. But hey I'd rather damage the bolt than the axle itself. If you're smooth it should be fine, if you smash pegs off stuff as aggressively as I did when I was a teenager you're going to have problems. Just make sure you have hubguards - Profiles are the only hubs I ever see with broken flanges. I had one that was missing 2 spoke holes without ever seeing a grind.