Help on Cervelo p5 2022 sizing

Hi,

I have an opportunity to secure either a size 51 or 54 Cervelo p5 new Frameset 2022. My first TT bike fit is on 19 Jan 2022, so I’d need to wait until then and miss out. I’ll do the bike fit anyway, but I’d like to understand if I can infer the Cervelo p5 sizing for me so I can secure the Frameset and pay a deposit.

I currently ride a size 53 pinarello dogma f12 disc road bike.

Frame Reach 383.3
Frame Stack 542.6

Body measurements:
Height: 175.5cm
Inseam: 83cm

I’m new to TT so I will need to ensure there’s enough adjustability with the cockpit and various parts of the bike to “play around” with the fit and get more aggressive with time. Hence I’d like a frame that allows me to do that.

Maybe a too aggressive frame size to begin with might be too much, hence why I’m not too sure on size 51 Cervelo p5. I don’t have enough experience though, so I don’t know.

Cervelo geometries for size 51 and 54 in screenshot below:

Any help? Thanks so much!

This would be the best place to get the info you are after:
https://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/Official_FIT_ASSISTANCE_for_Cervelo_TT_and_Triathlon_Bikes_P6893963/?page=unread#unread

Also, I have a like-new 2021 P5 Disc frameset for sale if you do miss out on your new one and indeed need a 51. It’s listed in the classifieds.

Best of luck!
Matt