Showing specs for all NA & NB Miatas

Rear brake disc runout limit

0.05 mm (0.002 in), maximum

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

Secure the rotor to the hub with two wheel nuts and measure at the outer edge of the friction surface. This record does not establish Mazdaspeed rear-disc applicability.

Applies to
  • NB 2001–2005 (BP-Z3) — Other years in this family inferred from 2005 factory evidence with owner approval; actual-year verification is separate.
  • Verified in: 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)
Sources
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
    Page PDF p. 1271
    Printed: “Runout limit 0.05 mm {0.002 in} max.”

Also in Additional factory manual gap audit