The most efficient tire size?
 

Some sizes you only have a handful of LRR sizes and some quite a few more. One size in particular takes the cake with 43 different LRR models to choose from, the 205/55/16. I have seen these on the front end of a 911 to the front end of an Eclipse GSX which of course is much heavier, and is still in use on new cars decades later. Another thing to consider is tire cost, not just mpg, and when there is more to choose from the cost goes down. I guess there is something to be said about a tire size such a wide variety of engineers continually choose.

So like the heading questions, when you weigh in tire cost it may be more than the fuel savings.

http://www.tirerack.com/tires/TireSe...erformance=ALL

Is there a question in there somewhere?

-soD

In your signature you are offering to help others w tire sizing. ????

And how are you qualified for this task???

Aren't you the guy who has no concept of gearing?

When you argue with an idiot, who is the idiot?

I wonder there is a tool can configure tire size
 

I wonder if there is a tool can configure tire size, then I google searched and found that multidiag yellow vci diagnostic tool has the function of configuring tire size(summer and winter). But I not sure about that

Well, since this thread is now been reopened after several months of inactivity......

The most efficient tire size is larger. That is, from the point of view of rolling resistance, drag, etc, the larger the tire, the better. Unfortunately, there is a down side, in that there is only so much room under the fenders.

Unfortunately, tire size is NOT a large factor when it comes to fuel economy. Things such as tread compound is much larger, so it pays to spend time trying to find the compromise that works best for you. Treadwear, traction, and rolling resistance are in opposition to each other.

Possible thinner and taller

Tires that are different than OEM spec can actually lose mpg . I think there was a thread in here about someone who had 15 inch and went to 17 inch rim and tire and oh yea lost mpg by a factor of 4-8mpg

Yes Dave!! what is the most efficient tire size???

He said: "The most efficient tire size is larger. That is, from the point of view of rolling resistance, drag, etc, the larger the tire, the better"


with a caveat of don't buy a sticky compound when a harder compound is available.

Mythbusters aside, the best is a "round" tyre!