A BF Goodrich 255/60-15 weights 31 LBS by comparison.
https://www.tirerack.com/tires/tires...omCompare1=yes
Not sure the weight of the Centerline is that low, but take 11 + 31 = 42 LBS, pretty close to the same weight as the 18 with a comparable size tire.
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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