Given the age of your rig, you probably have rims that are limited to the 80 psi tires. Are the wheels 6 lug or 8 lug? If they are 6 lug, you most likely have 6,000 lb rated axles, and can probably use good LT tires.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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