Absolutely, Jan isn't the only one running some numbers, nor the most objective / consistent. Here are two sets of better measurements on a range of sizes of a

Absolutely, Jan isn't the only one running some numbers, nor the most objective / consistent. Here are two sets of better measurements on a range of sizes of a single tire model, on the same wheel, over a range of pressures, with precise measurements of critical factors like tread depth, sidewall thickness, tread thickness, real world actual width, and actual rolling resistance measured in watts: https://www.bicyclerollingresistance.com/specials/conti-gp4000s-ii-23-25-28 https://www.bicyclerollingresistance.com/specials/conti-gp40... https://www.bicyclerollingresistance.com/specials/schwalbe-marathon-32-37-40-47 https://www.bicyclerollingresistance.com/specials/schwalbe-m... So, wider tires mean you can run a comfier lower pressure at the same rolling resistance. Looking through the rest of this site, it's also super clear that there are far more significant factors to rolling resistance than width. It's practically criminal this site doesn't get tons of attention!