rim and tyre size?

[oldeskewltoy]

Apolan Wrote:in real life, where people are not willing to spend 1000s of bucks for forged or magnesium wheels, more wheel usually means more weight. and 14' xyz rim will always be lighter than 16' xyz rim, in addition it will shift the weight further away from the center hub - which resoults in poorer acceleration. Also adding to weight is unnecessary width..

i.e. watanabe eightspokes F8F
14x6.5=12.5 lbs
16x7=16.1 lbs

i dont believe that those 2 inches of aditional sidewall weighs more than 3-4 pounds. plus you've pushed the weight further out..

and watanabes are considered to be somewhat light. imagine a heavier wheel. Perhaps some miata owners should write a thing or two about adding weight where it matters the most..

Ouch.... I was just trying to say it is possible and not unrealistic.

I suspect (I'm no engineer, so I don't know....) your mass argument, and how and where it is measured may be skewed.

But accepting all you say... it still can be done, without rubbing and no other significant issues as long as offset is correct.