Polaris Sportsman 450 2021 Owner's Manual page 127

MAINTENANCE
TIRES
WARNING
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. Always follow all tire maintenance
procedures as outlined in this manual and on the labels on the vehicle. Always
use original equipment size and type when replacing tires.
Refer to the specifications section for recommended tire type, size and pressure.
TIRE TREAD DEPTH
Always replace tires when
tread depth is worn to 3
mm (1/8") or less.
FRONT WHEEL HUB TIGHTENING
Front wheel bearing tightness and spindle nut retention are critical component
operations. All service must be performed by your authorized dealer or other
qualified service facility.
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