I've seen both sides of this argument, but am interested in what folks here might have to say on the topic. I've got a 2003 Silverado. Stock tire size is 245/75/16. If I go to a 265/75/16, the tire diameter increases by about an inch giving me about 3% less revolutions per mile. On the surface, this would give me 3% more mileage - BUT - how does the increased friction from the additional tire width and the theoretical increased work the engine must do play into the equation?
2nd scenario: I can go to a 265/70/16 and have virtually the same diameter with 20mm more width. How would this factor alone affect mileage?- posted
15 years ago