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Discussion Starter #1
have a topkick with well, honestly stupid looking black 19.5 rims. has a cat 3116 its a c6000 so its the lighter duty truck.

has 8 lug hubs. any thoughts on fuel economy for 22.5 tires vs my current 19.5s? it has a crazy amount of get up and go. i dunno if that would change with the big wheels. gearing wise. on my parts truck its a c7000 with 22.5's ( heavier spec) it had 10 lug hubs even though it has a puny 366.

any thoughts?
 
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