Polaris Predator 50 Owner's Manual page 154

Maintenance
Operating your ATV with worn tires, improperly inflated tires, non-standard tires or
improperly installed tires will affect vehicle handling and could cause an accident
resulting in serious injury or death.
Maintain proper tire pressure as described on the decal on your ATV and in the
owner's manual.
Always use original equipment size and type when replacing tires.
Make sure the wheels are installed properly.
Always replace tires when the tread depth measures 1/8" (.3 cm) or less.
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