Honda FourTrax Foreman Rubicon TRX520FM6 2020 Owner's Manual page 187

Tires
Air Pressure
Refer to Safety Precautions on page 111.
Properly inflated tires provide the best combination of handling,
tread life, and riding comfort. Generally, underinflated tires wear
unevenly, adversely affect handling, and are more likely to fail from
being overheated. Overinflated tires make your ATV ride harshly, are
more prone to damage from surface hazards, and wear unevenly.
Make sure the air valve caps are secure. If necessary, install new
caps.
(cont'd)
Servicing Your Honda 177