As per the thread
new 9.00-16 tyres for WD split rim wheels, Mike Kelly measured up some tyres and found out that the wheel diameter of the British/Canadian 16" tyres and rims are ¼" larger than those of US 16" tires and rims. That is why standard 9.00-16 tyres which are not marked "for British rim" can be hard to fit to this type of rim.
I measured the circumference at the bead at 129 cm which converts to a
wheel diameter of 16,2 inch. The circumference of the British and Canadian made rims is the same.
