The recommended tire pressure for 31-10-50-15 tires is 20 pounds per square inch (psi). This is the standard tire pressure for most ATV tires, and it provides a good balance between traction and ride comfort. However, you may need to adjust the tire pressure depending on the terrain you are riding on. For example, you may want to lower the tire pressure to 18 psi for riding in soft sand, or you may want to increase the tire pressure to 22 psi for riding on hard-packed trails.
