[COcyclist]

Great link! Thanks Frank. Yes, the trend toward bigger tires and lower pressure on road bicycles is a thing (except in a perfectly smooth velodrome). I have read several recent scientific studies conducted with bicycle tires on a rolling rough surface showing that lower pressures have measurably lower rolling resistance than the max pressure we used to run back in the day. “Gravel” riding and racing is adding to common acceptance of using wider/lower pressure tires.

However, this is primarily a motorized modding site and we should be cautious of using test data developed for road bicycles and applying generalizations to cars. For one thing, cars have sophisticated suspensions. The inflated tire IS the first and most important suspension on a road bicycle. Bike tires are round in cross section, car tires are square where they meet the road and have several steel belts to keep that profile flat in cross section. In my experience I have found higher pressure car tires roll easier and return higher fuel mileage.