I have a 99 with 16s on and have been wondering what sizes can i consider without hurting economy. thought about 17s or 18 but wanted to hear from those who have made the change.
So, you are thinking about changing your wheel size, tire size, or both? Any changes you make that add weight to the truck is going to affect your fuel economy. How significant the change depends on how big you go.
With out going with bigger wheels 285x75r16 with 18s wheels 285x65r18. Both should give you better economy by lower gear ratio.
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