Originally Posted by
NumbersGuy
That Rene Herse chart doesn't make a lot of sense in some cases, although the overall concept as a whole is valid.
For example, a 35mm tire can go on a max of 27mm width rim but a 44mm tire can go on a 28mm width rim. Not sure how 1mm on added rim width relates to a 9mm wider tire, but going up 2mm from a 28mm wide rim to a 30mm wide rim only nets you the ability to go up 4mm from 44mm to 48mm tire. Whatever rules or criteria they're trying to apply are not being applied with any consistency.
to note this is the chart from the tire standards org.... ERTRO it is on the rene herse site, not that it makes any difference with your observations. I would be interesting to understand the parameters
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