People are riding bigger tires than in the past anyways. 28mm and 32mm road tires are not unusual these days, comapred to commonly seeing 23-25mm. Gravel bike

People are riding bigger tires than in the past anyways. 28mm and 32mm road tires are not unusual these days, comapred to commonly seeing 23-25mm. Gravel bikes are often larger. They are not generally going to be slower because they are bigger in significant ways.