>>2055824BRR's test only measures hysteresis, which naturally leads it to tell people that narrower tires at higher pressures have less rolling resistance. But that doesn't translate to real-world performance, since at some point you reach an impedance breakpoint where higher pressures cause the tire to bounce up and down, which drastically increases rolling resistance, lowers grip, and makes the bike much more tiresome to ride. The rougher the surface, the faster you reach that breakpoint. That's where having wider more supple tires (on wider rims, rim width and how it affects the tire's shape is also important) helps and why the pros are now riding tubeless 28s or even 30s at lower pressures on tarmac. Tubulars are dead tech now btw
More reading:
https://silca.cc/blogs/silca/part-4b-rolling-resistance-and-impedanceAs for Vittoria, they just make decent tires and yeah, have that Italian name despite being made in Thailand. That's why real italoboo roadies run Veloflex, which came about when Vittoria left Italy
