Originally Posted by
Radish_legs
I switched from 23mm conti 4000 on front, and 23mm Schwalbe on back with butyl tubes, to 25mm conti 4000 + latex tubes. Felt like a huge difference in rolling speed to me. But maybe just mental. I'm convinced tires make a significant difference, between good and bad tires/tubes.
https://www.bicyclerollingresistance...d-bike-reviews I use as the gold standard (may or may not be) and yes you're right. GP5ks with latex tubes are probably somewhere around 25 watts faster than Gatorskins with butyl.