Dear Eric

I am into the market for my first TT bike, looking for a P5d. I did a generic fitting on Monday (IDMatch) and requested to have a "long distance" comfort setup for an Ironman on a fitting (modulable) bike.

Height: 1m83 (88kgs - rather athletic, BMI 26)
Inseam: 868mm

Saddle height: 760mm
Saddle seat back: 123mm
Reach from saddle to bars: 529mm
Drop from saddle to bars: -80mm
Seat angle: 80.7

Pad X: 400 (started initially at 504, but the machine reduced the distance during the fit automatically)
Pad Y: 670 (started at 676)

With this short reach (Pad X = 400) I am off all charts for a P5d according to Cervelo's charts on their website. I would fit on a P3X medium with these values. From my gut feeling I would go for a P5d sized 56, despite this "weird" reach value. What do you think?

Other question: Would a P Series size 56 be a better choice from a fitting point of view, due to the possibility of changing the front end?

My other bike is a Canyon Endurace CF size Medium. No TT bike yet. Many thanks in advance!