I'm on a mission that is greater than just prescribing Canyons. I'm an educator first and foremost. So, please hang in there for this tid bit. The terms Stack and Reach refer to a place on the frame (top of the head tube). This is a critical number for "mortal bikes" - any bike that uses a normal stem, like the Shiv that was in the list of options that your fitter offered you. Pad Stack and Pad Reach is a very different number and the one we MUST use for super bikes. I dug it out of your fit sheet and tweaked the Pad X as it was to the rear and Canyon measures to center.
Your Pad Y (Pad Stack) of 740 and Pad X (Pad Reach) of 555. Now, let's be clear, you're tall. Your saddle height is 887mm and your arm pad drop is 137mm. That's a bit more than 15% - which I'd consider a healthy drop....and...with all of this taken into consideration. The Canyon Speedmax SLX won't come up to meet you. The max Pad Y on the large is 685mm - a full 55mm lower than your number.
The Canyon Speedmax CF however will do it. You would be on an size XL with almost the max spacers to get to 740. And for the Pad X, you'd have to remove the 90mm stem that comes stock on that bike and put on a 110 stem to get out to 555mm.
Your big worry was the max seat height. I'm not even 100% sure that the XL will deliver out to 887. Let me send a note to the engineers in Germany to confirm.
I'm all about athletes mastering triathlon
Twitter - @TriCoachIan