I bought a used 2012 Cervelo P5 frame, and I need to buy cranks and a power meter. I'm thinking of buying a crank-based system since I need to buy crank arms anyway. I tend to use a larger chainring (56 or larger) if that matters. Can anyone suggest the best option? 4iiii? Stages?

I've been using a Powertap G3 hub for years, but I now want to move to another power meter type in order to provide more options for racing wheels.


Thanks!

---Francis