What matters more for a tire - section width or tread type?

 

Matters...for what?

 

i guess that all depends on what you need your tires to do

 

Despite what you have been told, size matters and so does the tread. Just depends on what you are trying to accomplish with them.

 

depends on what you are building

 

Oop - sorry about not being clear on that - I'm trying to figure out which has more affect on grip of the tire - its rolling resistance. For instance, if I were to change the tire tread, but maintain the section width, would I improve my mileage more than if I changed the section width of the tire and kept the tread pattern...