[SentraSE-R]

My personal comparison will have too many variables to answer the taller tire question, The best way to test just taller tires would be to find another xB owner with stock steelies, buy taller tires of the same brand and model for my old wheels, wear them in, and then do the ABA testing with the tires from the other car to swap between tests. That would be hard to pull off logistically.

But I want to answer the basic question for myself, even knowing I'm throwing in different wheel sizes, wheel aerodynamics, heavier tires, different inflation pressures, effective gearing variation, different tire compounds, different tread patterns, wider tread width, etc. Most of the significant differences work against my new wheel/tire combination. I can still pose the question: do taller tires improve mpg despite all these other factors stacked against them in this testing regimen? Actually, I guess the question is: what results will I get with my taller, heavier, less aerodynamic tire/wheel combo compared to stock?