here is 33/1250/r20 on mine hope this helps 
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2007.5 2500 ltz fully loaded crewcab,
banks air intake with scoop,
truxx 3inch lift, 33/1250r20
nathan k5la train horns,
b&w hideaway goose & 5th wheel
stealth 2, stacked with banks pda,
banks speed brake
mbrp duals-dpf & muffler delete
fire & ice lightbar, resonator plugged, egr blocked,transgo jr |