re: tire clearance, I don’t really see that as an issue as they are gearing this bike towards racers vs. the rowdier side of things…and if it has clearance officially for 42’s, you can most likely use 45’s with no issue.
As noted, if you want a wider tire, you can go with their Grizl.
I like the fact that the cables are more “concealed” vs. integrated. You get the aero benefits w/o the hassle. Also makes making the bike for travel more realistic. Unfortunately, Canyon specs their stems too short (for me) and doing a HB swap with them is near-impossible…and expensive. Yes, you can apparently run aftermarket stuff, but if I am paying for a part that comes on the bike as spec, I want to be able to use it or get replacement credit.
ETA - my current bike (54 Aspero) has a S/R of 555 / 388. With my 120 stem, the reach is 508. On a comparably sized Med Grail, my overall reach would be 481…way too short. If I went to Large, the overall reach would be closer at 497, but still a full CM too short and the stem would be slammed (which is fine).
The Aero Pack System is interesting, but would want to try it on the bike as I tend to have an narrow q-factor for my knees. All frame bags that I have tried have resulted in me constantly brushing up against them.
The one odd thing I saw was this:
The fork legs also get indentations molded into the carbon that allows for a secure Fork Load Sleeve adapter to add fork bag or water bottle mounting, without the need for conventional threaded mounts
they went to seemingly great lengths to make this a gravel race bike, so this spec seems a bit out of step with the overall design / intent of the bike.
Pricing seems to be really good…$3K for a GRX 12 spd mechanical is a very reasonable, IMO…as is the $5K SLX w/ GRX Di2 (although that would be 11 spd).