Hi Ian,
I have a 2014 Cervelo S5 with clip-on aerobars. I am planning to get a Canyon Speedmax CF 8 Disc and I am in doubt if I should go with M or S.
Canyon's calculator recommends M based on my height and inseam. It would be great if you could help/advise on a size/setup as not sure how it converts from road w/ clip-on aerobars to tri-bike.

Measures:
Height: 183 cm
Inseam: 88 cm

Cervelo S5 frame size: 56
Cervelo S5 Stack: 580 mm
Cervelo S5 Reach: 387 mm

Measures made with my Cervelo S5 and clip-on aerobars. I feel comfortable in current setup.
Pad Y (Stack): 705 mm
Pad X (Reach): 370 mm (measured to back of pad)

** Canyon comes with 170mm crank length. My current Cervelo S5 has 165 mm and I plan to get 165 mm crank length for the Canyon as well.

Much appreciated.
Thanks,
Chris