Bike for draft legal triathlons and TTs?

I have 2 bikes at the moment: 2010 P2 that I used for TTs and Triathlons, and a CX I use for everything else.

I have a draft legal tri in a month and need a new/old bike. I’m thinking to buy a Canyon Aeroad/Cervelo S5/Cannondale SystemSix/Giant Propel for draft legal tri, club rides, crit, sunday rides. I can see the new cockpits on the Aeroad allow TT bars so perhaps I could sell the P2 to help fund my purchase.

Do you think Canyon Aeroad/Cervelo S5/Cannondale SystemSix/Giant Propel will be more/less aero than my old P2? Is there a website to compare aero data across different models?

A properly fitted mid level road bike is more than enough for draft legal tri’s; a “super” road bike with clip ons will be a lot slower than your p2 on no-draft races
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Yep, what Jolly R said. If you can keep the P2 and still get the new road bike that would be best in order to be fastest across all styles.

I don’t know if you are an age grouper or pro but age groupers are not allow to use aero bars at all in USAT/ITU draft legal triathlon. Of course you could use them if using the bike for no-draft tri.

We used to be able to use them in DL but they changed the rule in 2015.

I think he meant that he would buy an aero road bike for his draft legal races and possibly add clip on bars whenever he’s racing no-draft
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Thanks, I kind of got that but wasn’t sure of his intentions.