Originally Posted by
JohnDThompson
It would be so much simpler if tire and rim manufacturers would just use the ETRTO/ISO size designations instead of inventing, new, arbitrary and confusing terms.
Yeah, you might think they would have learned from all of the confusion of, for example, 7 or more incompatible "26 inch" sizes, but no, they had to invent even more confusing sizes from old ones.