Originally Posted by
surak
Except the GP 5K, being a different tire, inflates to a different volume for the same nominal width than the S TR, so it really is comparing apples to oranges.
Is there really a material difference in internal volume between the clincher and TR? Data from BRR: at 100 psi on a 17.8 mm internal width rim, the two tires are rather similar in measured width, height, and tire thickness.
Seems like searching for a difference, when a meaningful difference isn't there.