Cars must comply with the official NSR technical rules (attached below), with the exception of rear tyres, which can be as follows:

• Rear Tyres – black NSR tyres with the part numbers listed below may be used.
  • 19.5 x 13 slick
    
    • 5284 – Supergrip Evo (standard equipment)
    • 5285 – Ultragrip Evo
    • 5320 – Extreme
  • 19 x 13 slick low profile
    • 5287 – Supergrip Evo
    • 5288 – Ultragrip Evo
    • 5321 – Extreme
  • Can be glued & trued.
  • The NSR marking must be clearly visible on at least one sidewall of both rear tyres.