15x8 and 15x9 6ULs at Trackspeed Engineering
 

In addition to our full lineup of drivetrain components for all NA and NB Miatas, we're also a 949Racing 6UL dealer! We stock 15x8 and 15x9 6ULs at our Northern California facility and are able to ship anywhere in North America, Asia, and Australia. With 8 years of experience on 6ULs, we can also provide detailed fitment support for your exact application.

If you're looking for 6ULs for your NA/NB, look no further. :party:

Product Link - 15x8 and 15x9 6ULs @ Trackspeed

https://www.miataturbo.net/attachmen...ine=1457038881

To go to 6UL 15x8, what other items are needed? Must one also change studs and lugs, or is that optional? '99 Miata. Also, will standard valve stems work, or only the 949's?

15x8s will bolt up to any NA/NB Miata with no modifications. That means stock lugnuts and stock studs are not a problem.

The alloy lugs provide more wrench clearance (19mm vs. stock 21mm lugs) and make tire changes a bit quicker.

Any standard rubber valve stem will work. The alloy valve stems are lighter, but more importantly, they fasten more securely to the wheel (easier to check/set tire pressures) and they do not degrade with heat like a standard valve stem does.