Rim (not tire) clearance for caliper brakes?
I am wondering how far the arms on newer short-reach caliper brakes open up, I have rims that are about 25-26mm wide (touring/hybrid rims), and I would like to use them on a newer road frame. Curiously, I can't find any info about that spec on the Shimano website. I'm hoping that I don't have to buy narrower rims to use with the new frame I just bought. I am specifically referring to rim clearance, not tire clearance.
Does anyone know how wide they open? If I had some here, I'd do it myself, but I don't have any yet. I am looking at lower end Shimano (Tiagra, 105) or Tektro calipers.
Also, do long reach calipers open wider?
Sorry if this is a common question, but I used the search and can't find any info.