Originally Posted by
Sy Reene
I'm a bit confused on sentiment I'm reading where people adjust the PSI based on the tube being used. Isn't PSI, PSI? (ie. in laymans' terms, force of the air in tube preventing deformation of the tire).
Generally to avoid bottoming out, pinch flats, and/or subscribing to the (somewhat well established) 15% drop guidance, and assuming your weight is constant, why does one use different PSIs based on tire/tube material?
To be clear my statement has nothing to do with a tube material dictating psi. I base that off of tire size and maybe a little on the type of tire but I prefer high thread count tires and my experience is those can go a little lower on pressure than a tire with flat protection and longevity being the most important features. My pressures are are the same no matter what tube I'm using. I actually ride a 23 at almost an identical pressure as a 25 and see no benefit in one over the other. There is a slight difference in ride quality depending on tube type. I actually have less flats with latex over a standard tube.