Originally Posted by
Cypress
Given Schwalbe's recommendation od 100 psi for a 25mm tire provided by
Sy Reene , the following can be mathematically provided for a wider rim.
My 25mm GP5k's measure out to nearly 30mm on my HED Plus rims, so I used 30mm as the final diameter for simplicity.
25mm cylinder volume: 1033289 ml
30mm cylinder volume: 1516918 ml
Applying Boyle's Law, the final pressure can be given by P1V1 = P2V2, or this fun screenshot I took for conveniences sake:
If your 25mm Schwalbe opened up to 30mm on a
wide rim, your final pressure would be 68.12 psi for a comparable ride quality.
So for a 30mm tire, that actually measures 31.54mm on a 23mm inner width hoop? I weigh 185#