Dixon 2004 Operator's Manual page 31

CARE AND MAINTENANCE
TIRES:
Correct tire pressure is essential for efficient operation
of the mower. Check tire pressure periodically. Inflate
tires to the pressure listed below.
Lug nuts or lug bolts should be checked regularly for tightness.
Front tires
Rear tires
9 x 3.50-4
16 x 6.50-8
16-21 lbs.
8-14 lbs.
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