higher capacity airbags, which don't exist as far as I know, do not affect tow ratings. Read the chart. with 20" rims and a 3.55 gear ratio, your tow rating can be just over 6000 pounds. That puts you a ton over the combined rating. Same truck with 17" rim sized tires and 3.92 gears will get you 2000 more pounds, but you will still be pushing the limits.
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