Originally Posted by
smd4
I didn’t know there was such a thing as “sizing standards.” I thought there was just “sizing.”
As the saying goes "the nice thing about standards is that there are so many to choose from".
A new standard known as ETRTO (European Tire something something something) came into effect a few years back, in order to account for a move to wider rims for road bikes. Vittoria was one of the few folks to make an effort to explain how this changed how the marked width compared to actual width.
I'm not sure how long it takes for the warehouses to clear out the older tires, but anything made "recently" should be narrower than the equivalent tire produced before ETRTO took effect.
Steve in Peoria