Inner Tire ? You Mean Inner tube or tire, Its on the Outside.

Best pressure Is Embossed in the Mold that the Tire is Made In .. Read the Tire Itself.

there are BMX Stunt riding tires made to take serious abuse an spec'd to take a High Pressure , by their Casing design.

Wider the tire the lower the air pressure needed because of the greater Volume.


I have Thorn resistant Heavy duty tubes in my 20" wheels all that extra rubber means I dont have to pump it up often.