On a Scientific Triathlon podcast I listened to the other day it suggested putting different tyre pressures in front/rear depending on weight distribution.
On a road bike the distribution is typically 60%-40%, with more weight on the rear wheel. So 60% of the total tire pressure should be in the rear tire and 40% in the front.
The pressure that you put in the tire should take that into account to maximize the relationship between the function and rolling resistance.
Until then I’d always used the same pressure in both tyres without really thinking about it.
Here’s the calculator they reference:
The calculator gives me the following:
That’s quite a bit lower in the front than I’ve used before.
Here’s the podcast show notes:
The calculator is based on this white paper: