Showing specs for all NA & NB Miatas

Rear brake disc runout — maximum (NB1)

0.002 in (0.05 mm) maximum0.05 mm {0.002 in} maximum

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Secure disc to hub using two wheel nuts. Measure at outer edge of disc surface.

Applies to
  • NB 1999–2000 (BP-4W) — Other years inferred from 1999 factory evidence.
  • Verified in: 1999 Mazda MX-5 Miata Workshop Manual