My Bedford QL has some Canadian 20" wheels on it, a throwback of when it served in Denmark no doubt, they would have got mixed up with CMP, etc. The rims are all marked "RF" so could have been for armoured vehicles. They are marked with the makers initials "KH" for Kelsey-Hayes and dated either 1943 or 1944.
The 16" wheels with either zero degrees or 5 degrees, I am sure only applies to 16" and not 20". Cannot remember where I got this from though
Richard