Tire Question

[SilverBullet75]

Hi,

I was looking at the Miata.net tire calculator and trying find which size of tire would be a perfect match/upgrade for 16" to 18" without messing with speedo accuracy.

What I found was:
To get a 0% difference between the 245/70/16 and the 18", you would have to use a 325/45/18... Is this even physically possible on a VX (stock height)?

Thanks!
---JIM---

[PHO2GR4]

Or you could go with a 265/55/18...

...or 285/50/18...

...or 295/50/18...

Those percentage differences are WELL within the average speedometer's accuracy anyway! I'll bet the VX speedo is off by up to 4% or 5% when it rolls off the racks, brand-new. Changing tires that suposedly change the accuracy by .1% might actually make it MORE accurate, for all you know.

Regardless, when I went from stock to my 275/70/16s, my speedo apparently became 5.6% too 'slow'...so when my speedo says 60, I'm really going 63.4.

Not fast enough to get noticed by Smokey, I hope!

[chraika1]

i have 265/60r18 on mine.. there was 1/16th of an inch clearance on stock setting when u turn the wheel fron tht front bumper.. if u go anything wider then 265 on ur stock 18 inch wheel it will buble up and ride like crap.

Ash

[SilverBullet75]

Thanks!

I'm considering the Yoko AVS and BFG AT KO...

Those who have either, please tell me how the hwy noise level is.
I have Good Year Mudders now... so anything is an improvement in noise/gas mileage...

Thanks!