Spec Miata guys are not allowed to run a wheel that weighs less than 13 pounds, if I recall. That's why they run those wheels. Keeps the costs down. Right now, the best bang/buck is the Kosei K1-TS at 10.5 pounds. The lightest is um... I think SSR Comps at 8.5 pounds. For 15's that is... the lightest 14 is the 6.5 pound Volk CE28N that I have.
Yeah, I saw the TS. Nice wheels. And I'd LOVE to get them in that neon orange color they have, haha...
Do you think the extra 8-10mm of offset for a +30 wheel would be noticeable for autox use over something like the K1-TS?