So, the discussion wasn't completely useless after all; I learned something new.
Otherwise, don't worry, Martin, the tire change won't cause you any problems.
P.S.: I have already had to experience firsthand that using car parts as a reference should be done with caution.
I just wanted to quickly show you the pictures.
Since I happened to have it on hand, the CT945 is the improved version of the 867 and should (or rather, must) be used instead.
Be careful with autoteile.cc; they advertise the Conti 945 but then ship a generic replacement that is intended for the 867, which is not approved for use with the AFN engine.
Attached are the technical specifications from Continental.
Does anyone know of a cheap source for the Conti ZR tire or the entire set?
By the way, the tensioner pulley on my engine has broken, even though the timing belt is practically new.