Basically tire pressure of each tire has to be written on tires himself.
Tire pressure is depending on a load, it means heavier driver much pressure needed. Generally we can conclude following:
|Bikes tires||Tyre pressure (PSI)|
|Narrow tires||80 – 130|
|Mountain bike tires||25 – 35|
|In between type of tires||40 – 70|
depend on rider weight (Kg)
Tyre pressure (PSI)