[TartanJack]

From Miata.net:
http://forum.miata.net/vb/showthread.php?t=127326

Worth the read . . .
(Why "Lighter is Better" . . . )

Edit:
Another- http://forum.miata.net/vb/showthread.php?t=127348

 

[wansuie]

you are right, That is why I choose the O.Z. Crono HT (45mm offset 16X 7), and it was lighter than the stock rim by 5 lbs per tire.