I was wondering if anyone has had any success in getting 60+ mpg tanks on tires other than the stock Integrity's? I'm shopping for new tires for some 15x6.5 wheels and wanted to jump up to 195/60's instead of the stock 185/65's. I am willing to use the stock tires if there are not any other options available to stay at or increase my fuel economy. Right now I am getting 61.4 mpg during the first 185mi on this tank. I'd like to keep it there with new tires if possible. Thanks, Brandon
Been on Michelin HydroEdges for the last 34k miles. Had a 73mpg tank recently. Routinely in the 58-63mpg range. Anticipate a couple thousand miles of break in though...there will be an MPG drop during that period.
<div class='quotetop'>QUOTE(efusco @ Jun 16 2007, 05:10 PM) [snapback]463195[/snapback]</div> As I just mentioned in another thread, I did manage a 600 mile tank on my new Toyo Tourevo LS tires. The mpg indicated by the MFD was only 53, but I've only about a 1000 miles on the tires, and I've included highway driving at 70 mph. I do have them pumped up to 51/49 though. They're rated at 51 psi. Dave M. P.S. They are 195/60/15 tires.
I have the 16" Turanza's (Touring Edition) and got over 600 miles on my last three tanks (627, 605 & 663). The 663 tank was my best yet (63.8 mpg). Unfortunately, simply too much interstate driving to get mpg in the 70's. I now have about 5400 miles on my Prius. I love driving this vehicle!
Seeing that tirerack recommends a 185/65 tire for the 15x6.5+35 wheel I think I'm just going to continue to use the stock Integrity's. Does anyone know how hard it is to reinstall the Tire pressure sensors? Will they work with any wheel? Thanks
They will not work on any wheel. The angle at which they sit on the inside of the rims is critical, according to my Toyota parts man.
Evan, What size Hydroegdes did you get? and what pressure do you keep in them? thanks...... I got the 205-65-15 and the wider tire is killing me!!! I've lost 8-10% on my MPG...
I think that's the size I got. I took a big mpg hit the first couple thousand miles, but they broke in and seem to do quite well now. I used to run them at 42f/40r (the 73mpg tank mentioned above), but have recently started running 50f/48r.
Don't forget your 205/65/15 is bigger in diameter/circumference than the stock 185/65/15, that alone will make your mileage look 3-4% lower than it really is.
Does that mean the "smaller" the tire, the better the FE? I could care less about handling, I just want to best gas milage. If that means buying "bicycle tires" so be it. Brad Tampa Bay Florida
Skinnier tyres reduce drag as well as other factors but you have higher sidewalls than stock which mean your odometer will read less miles than they would if you had stock tyres because the wheels turn less times per mile than stock. They also mean you need more throttle to achieve the same acceleration. Try this tool http://www.miata.net/garage/tirecalc.html It will tell you about changes to tyre radius with changes to tread width and aspect ratio.
Yep, as patsparks says, there are a number of things to watch out for when changing tire size: Going with a bigger tire (in diameter/circumference) will decrease acceleration and gas mileage as it will be heavier and have more rolling resistance. Going with a bigger tire will also make your odometer/spedometer read low. This will also cause your mileage to appear lower than it really is. Note that when going with a wider tire, unless you change the aspect ratio the tire will also be taller. For example, when you switch from a 185/65/14 to a 205/65/14, not only does the width of the tire increase by 20mm, but the circumference increases by 3-4%. The tire size calculator will let you know what tire sizes maintain the overall circumference as stock which will keep the speedo accurate. And yes, in general, smaller, narrower tires will be more efficient than larger, wider tires.
