Yeah, width is definately one factor of many. End goal is to influence where you are in the powerband at a desired speed or distance to improve e.t Or speed.
Depending on the application you may be able to increase just width, or just height. Or quite possibly you might want to go with a smaller tire.
I was just mentioning how it worked in my application. I didn't have traction from a dig in 2wd with the oe tires. The extra 5 pounds per tire, friction from a larger contact patch, and slightly reduced gear ratio was just enough to give me traction without greatly affecting power to the ground. And put me in an rpm range that improves et because of a later shift.
But I'm actually waiting on some new wheels that are 2lbs lighter. Where that weight is on the wheel could have a big effect.
So all of this could potentially go out the window
I'm sure Grumpy or someone will be along shortly to correct anything I may have stated incorrectly