Quote:
Originally Posted by aerohead
Its a good question and all I can do is relate what I experienced with the CRX.Michelin was touting their Green-X tire in the mid-nineties.Claims were maybe 4-5 % better mpg.They were not available in 13-inch wheel,so $1,000 later I had a set of 14-inch alloy wheels off a CRX Si and Michelin's new wonder donuts.The whole thing was a bust! I never experienced better mpg,either with the low-rolling-resistance of the tires,nor the reduced inertia of the lighter alloy wheels.The tires did have excellent wet and dry traction,not a bad reason to have them,but never delivered on the mpg promise.So all I can say to you is that the experiment didn't work for me.As to the wheel-covers,I did a post installment on Wheels/tires/wheel-covers.It may have some data for you to think about as to what you might expect from a set "of MOONS".Hope it helps,Phil.
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After doing allot of reading it looks like factory alloys are heavier than steel wheels on most cars. For example the Yaris steel wheel is 15lbs while the alloy is 17.5lbs. Wonder what the alloys weighed you got? probably heavy.
I guess I assumed in the first post that alloys would be lighter and they can be but in much more pricey aftermarket selections. Plus the tire itself seems to weight different amounts depending on the brand and model.
As it looks like ChrisD proved, lighter wheels = better