Hi! Really interested in the Aura RX. What would one recommend for tire/wheel size for maximum miles per gallon Please serious question! I drive for max mpg. Thanks, Bill

I don't have an exact tire/wheel size to suggest, but consider the following:


Taller Tire = Less RPM = Higher MPG.


Shorter Tire = More RPM = Lower MPG.


Wider Tire = Bigger Contact Patch With Road = Less MPG.


NarrowTire =Smaller Contact Patch With Road =More MPG.


There's gonna be some other factors, such as tire tread, weather conditions, highway driving vs. city driving, etc. that will also affect the milage you're getting.

All your info is great and correct...If the original tire size for the RX is 225-50-18, i was thinking of going to 225-55-18. The speedo would be off approx 2 mph. Larger diameter/lower revs/very slight change in handling. I could also go with a narrower 215 but then I think I would be compromizing handling.????

Yes, the handling may be a little less, but it's hard to argue exactly how much less cornering capability you'd lose. I will say one thing tho; for very wet conditions and for snowy conditions the narrower tire will not hydroplane as easliy and it will cut through the snow easier. just a thought

A link that should help out. If it does not work it's only because you need to do the suggested upgrade.


http://www.miata.net/garage/tirecalc.html


ps: everything is compromizing to something otherEdited by: sw2cam