ask chris brown, assuming he is still there 423-591-8857 or 423-591-8830ext 250

It's a Praxis PF30. I almost fired off an email to QR, but they list it on their FAQ page. Also, unless you have the tools, you're gonna have to take it in to get pressed. My mechanic said it was one of the tightest PF BBs he's installed.

Also, be sure to check if there's a gap between your pedal arm and BB cup. I installed the crank myself (Ultegra R8000) after having the shop press the BB for me and ended up having to go back and have it shimmed.

All that said, I absolutely love my PRFive! Can't wait to try it at GC 70.3