Originally Posted by
Sy Reene
I'm not sure I understand this idea. To use an example wherein I want to achieve a net width of a 25mm tire, if I were to mount a 25mm tire on a 15c rim, and it measures the same as its nominal width (ie. 25mm), vs mounting say a 23mm tire on a 19c rim and by doing so its larger and comes to the same 25mm. Do I inflate differently for these two scenarios?
Yes, the 23mm tire on the wider rim will measure the same width but have lower volume than the 25mm tire on the narrower rim, but more than a 23mm tire on a 15c rim. It ends up falling somewhere inbetween in terms of volume so inflation pressure should be inbetween the two.