A Complete Guide to Spec Miata Racing Classes and Where to Race Them
Spec Miata racing classes have various names and divisions across different racing organizations. Here's a comprehensive guide to understanding the different classes and where you can race them:
Main Spec Miata Classes:
- SM (Standard Spec Miata): The primary class raced in SCCA and NASA
- SM2: NA (90-97) Miatas only
- SMSE: Southeast regional class for 90-93 1.6L Miatas
- SMT: SCCA class using Toyo tires instead of Hoosiers
- SSM: Showroom Spec Miata (90-93 1.6L only, more restrictive rulebook)
Mazda Miatas lined up at race
Related Racing Classes:
- ST6/TT6: NASA power-to-weight classes
- STL/ITS: SCCA classes where Spec Miatas can compete
- Various regional and club-specific classes
Racing cars at NASA Northeast event
Key Differences Between SCCA and NASA:
SCCA Requirements:
- Hoosier tires (SM 7.5 or Wet)
- Optional containment seat/center net
- Optional fire system
- 4.30 final drive for 94-97 cars
NASA Requirements:
- Toyo tires (RR, RA1 for wet)
- Mandatory containment seat/center net
- Mandatory SFI/FIA fire system
- Choice of 4.10 or 4.30 final drive for 94-97 cars
Red Spec Miata racing on track
Additional Racing Opportunities:
- SVRA Vintage Racing (follows SCCA rules)
- Gridlife events (GLTC and GCS)
- Endurance racing (Lemons/Chump/AER)
- Private track clubs (Lime Rock, Monticello)
Spec Miata race car on track
When purchasing a Spec Miata, verify its specific class compliance, as modifications between classes can vary significantly and affect racing eligibility.
Blue Miata race car
Modified Miata engine compartment
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