|
I think there are too many variables to connect fe to just width. Even tires within the same "family" have differing r.r.s depending on what size they are.
Were I to guess I'd say 1/2" isn't enough width change to really affect fe... supposedly lower profile tires have r.r. advantages so it would cancel out?
I've seen where tires have substantial dimension variation anyway- they aren't as dimensionally stable as a lot of other things that pop out of molds.
I've run several different widths but then on mine they were also several different manufacturers, several different weights, several different diameters so I personally can't draw conclusions from experience.
I have seen Michelin make oblique reference to "square" contact patches having lowest r.r.. I tried a tire pressure/contact patch geometry experiment to see what it would take to get "square" patches on my car but I didn't really reach a solid conclusion. If anything it appears many stock tires are too narrow for the "square" patch theory.
|