The big performance knocks against the original P2/P3 were aerodynamic drag from its cockpit, dirty cable routing, and location of the rear brake. All of these have been significantly improved with the current generation P-Series. Plus, you get disc brakes with the P-Series, which might be a plus for you, depending on your personal preferences.

I have 2015/16 P2 and love it, but you should get a P-series if it's only $1000 more.

Any particular reason why? I was thinking to use the $1k saving on wheels.

The new P series is going to be a faster over all bike. The get the NOS P2 to anywhere near the same speed you're going to have to redon the front end. That's going to cost you ~$900 minimal. You only save $100 before labor & your time selling the cockpit/bringing everything to the bike shop and any small parts like cabling/housing they may need.

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Brian Stover USAT LII
Accelerate3 Coaching
Insta

Ahh I see, thanks so much for the input, very good to know. Will take this extra cost into consideration then.