@stinkyface Sorry it took me so long to get back to you. I tried what you suggested and it turns out there's a small area on the tire that feels "flatter" than the rest. It's not a bump, on the contrary in fact, but it would still explain what I was describing. I'm surprised and a bit amazed that this can make a difference in the "road feel" :) Most of my miles are not on smooth blacktop here in Canada, far from it, so if it's not detrimental to the OW itself I can live with that tire. Thank you so much for helping me find an explanation!