I just bought a Cervelo P3 2013, Brand new. I was wondering what the best under seat bag would be. I understand I need a seat post extender as well. Also I want to train with power, what is the best power meter ? in the pedal or on the crank ?
Thanks in advance 
oh my goodness where is my popcorn!!!
I would highly recommend searching the forum on here using keywords and take that in first. There are literally hundreds, no, thousands of pages probably on discussions on here about power meters and whats best. It is purely what you are wanting regarding money/precise measuring and many other variables. Seat bags probably have some pages too…just trying to help
Thank you I am new to this appreciate your help…