I think your 33's are more of a 305/65 because they looked wider than my 295/75 tires but mine measure out closer to 34". You could probably fit 35's if you wanted to and the Hummer tires are 315/70/17 I think so you might find a better deal on that size.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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