I’m around 190cm tall. I have a pretty good idea of my bike fit and I will get within -4mm of my regular reach with a 120mm stem length and a 40cm bar. Stack will be similar or a bit lower to my current bike, if required. I’m currently riding a Ridley Helium in size 57, which comes out very tall. It’s around the equivalent of a “classic” size 60.

The setback of the seatpost should be no issue since the seat angle is quite steep on this one. Also, the bb is lower than on my Helium.

But it’s about the smallest frame I can get away with with a 120mm stem.

thanks for your answer. I just ordered my Frame, im 186cm, i also went for the xxl one with 110/400 handlebar. i hope it was the right decision. I used the current canyon aeroad geometry as orientation. The Canyon size L is very similar to the r218 XXL.
I have another Canyon CF roadbike, so im fairly confident about the best size for me regarding canyon bikes.
I have a focus culebro racebike that i use on my wahoo kickr which has nearly the same dimensions as the XL r218 and it feels too small for me.
i chatted with chris via whatsapp and he told me the xxl frames are in production at the moment and will be ready for further at the end of July. i chose a simple Painjob, matte grey. Shipping to germany via EMS. i will inform you guys when it arrives. It will be the first time i Build a bike so i invite you to join and help me on this journey haha.

Julian