which tire size?

I read it as a rhetorical question not requiring a real answer, and I don't really believe he'd tip over. That was humor - I even used a smiley.

Unquestionably there are many factors, including weight, that impact fuel economy. However, in this case I wrote only of tire size and I tried make clear that a larger tire in itself “Unless there are other factors involved …” and ”Absent other factors such as power curves, rolling resistance, wind resistance, etc…” should show an increase in mileage. Writing Fail me or Reading Fail you.

I don’t know anything about tire weight and its impact on mileage and therefore I can’t speak with any authority, but TW convention dictates that I not let that stand in the way: What’s a lot more weight? Four tires combined for 100 lbs? Is a tire’s weight calculated as a load weight, or is a load only what the tire carries? I have no idea. Find a 31” and a 40” tire and get them rolling across a parking lot at the same speed. The heavier 40” probably takes more effort to start, but I bet it travels further due to its momentum when you let go. How much additional energy would you expend on the 31” to have the tires travel like distances? Again, I don’t know and I don’t think it’s worthy of concern. It’s just a guess, but I doubt that a speedometer calculated gas mileage would even be accurate enough to show the difference of 120 lbs of rolling tire weight. Not so, rolling resistance, but that’s way beyond the thought process required of my pay grade.

In this case, the weight factor is not an issue. I'm pretty sure that the 40" skinnies he's been looking at will weigh much less than stockers and should provide him phenomenal Fuel Kilometerage or Kilometers per Liter, or however it's phrased in Canada when you metrically go further with lesser.

 

Your correct, a smiley would have clarified my question .

Thank goodness you clarified that with such a detailed response <- smiley

 

I know. It's a disease. My response would have best been served with a smiley. Dry humor and sarcasm are sometimes hard to communicate in writing, but nonetheless amuses the writer. I really did try not to came across too seriously, but it's a very thin line that I questioned myself if I had crossed over.

No harm intended and I apologize if my post came across as offensive. The last thing I want is to be thrown off my third consecutive forum in as many months.

 

i do tend to agree with you rebel. if the tire weight is only one pound more than the stock tire size, and the tires are exactly the same, just one is 1" bigger, as long as i take into factor the 3.4% difference i should yield near identical gas mileage as stock.

i would think the same would exist with running 40" tires, if they weighed the same as the stock tires you should be good. but of course they are going to weigh much more which is wear you will begin to see a loss in mpg.