Originally Posted by The Griz
These lug patterns between the three are too closely related for the lug pattern to be a factor between them in mileage, even though you want it to be, Ender.
By your own math, one has 50% center knobbies and the other 33%. A difference of 17% which is statistically significant in anyone's book. Most scientific studies consider 5% statistically significant but I can be lenient and go with 10%. I am with you however, an empirical test would be best and I look forward to your report.