This is a quick-reference guide for wheel and tire combinations on the 1990-1997 Mazda MX-5 Miata (NA6/NA8). The first-generation Miata established the modern lightweight roadster formula through exceptional handling dynamics, low unsprung weight, and precise double-wishbone suspension at all four corners. With curb weights from 2,100-2,300 lbs and naturally aspirated engines producing 116-133 hp, the NA prioritizes momentum driving where tire selection and unsprung mass management are critical.
For detailed wheel fitment information including brake clearance and specific wheel models, see the NA Miata Wheel Guide. For tire diameter tolerance and performance category details, see the NA Miata Tire Guide.
Wheel & Tire Fitment Guide
| Wheel Size | Offset | Position Out / In | Tire Sizes | Fender Work | Min Camber | Notes |
|---|---|---|---|---|---|---|
| 14x5.5”, 14x6” | +45 | — | 185/60R14 | OEM Standard | ||
| 15x6” | +45 | — | 195/50R15 | OEM Special Editions | ||
| 14x6” | +40 | +5mm / -5mm | 185/60R14, 195/60R14 | |||
| +35 | +10mm / -10mm | 185/60R14, 195/60R14 | ||||
| 15x7” | +35 | +23mm / +3mm | 195/50R15, 205/50R15 | |||
| +30 | +28mm / -2mm | 195/50R15, 205/50R15 | ||||
| +25 | +33mm / -7mm | 195/50R15, 205/50R15 | ||||
| 15x8” | +28 | +42mm / +8mm | 205/50R15, 225/45R15 | Recommended when lowered or with wider tires | -1.5° | |
| +25 | +45mm / +5mm | 205/50R15, 225/45R15 | Recommended when lowered | -1.5° | ||
| +20 | +50mm / +0mm | 205/50R15, 225/45R15 | Recommended | -2.0° | ||
| 15x9” | +35 | +48mm / +28mm | 225/45R15 | Required | -1.5° | Coilovers Req. |
| +25 | +58mm / +18mm | 225/45R15 | Flat Roll | -2.5° to -3.0° | Coilovers Req. | |
| 15x10” | +25 | +71mm / +31mm | 245/40R15 | Pull | -3.0°+ | Coilovers Req. |
Popular Proven Setups
Daily Driver / Street
15x7” +30 to +35 - 195/50R15 or 205/50R15 - The widest “no hassle” setup that maintains the NA’s lightweight character while improving grip over stock. Direct bolt-on fitment with no modifications required. Lightweight wheels in this size typically weigh 9-11 lbs, representing minimal weight gain over factory 14” wheels. Excellent tire selection in extreme performance and max performance summer categories.
14x6” +40 - 185/60R14 - Period-correct option. Maintains factory ride quality and unsprung weight characteristics but is limited in tire selection.
Aggressive Street / Track
15x8” +25 - 205/50R15 - The “easy button” for the NA Miata. Places the wheel perfectly flush with the fender, optimizes track width for handling, and supports a 205mm tire with proper sidewall geometry. Requires approximately -1.5° negative camber and fender rolling if lowered. This configuration is a popular enthusiast setup, balancing grip, cost, and modification requirements.
15x8” +28 - 205/50R15 - Slightly more conservative than the +25 offset while maintaining excellent performance characteristics. May reduce or eliminate the need for fender rolling on stock suspension height. Popular choice for dual-duty street/track cars seeking performance without extensive fitment considerations.
Track / Competition
15x9” +35 - 225/45R15 - The track rat standard and dominant configuration for autocross classes and time attack events. Requires comprehensive setup: coilovers for inboard clearance, fender work, and minimum -1.5° negative camber. Massive tire selection in 200TW compounds.
15x9” +25 - 225/45R15 - Lower offset alternative providing more aggressive stance and slightly reduced scrub radius. Requires same modifications as +35 offset but with increased negative camber requirement (-2.5° to -3.0°) to prevent fender contact. Popular for dedicated track cars prioritizing maximum track width.
15x10” +25 - 245/40R15 - Extreme width reserved for competition setups. Requires fender pulling or flaring, coilovers, and minimum -3.0° camber. Represents the limit of NA Miata fitment on stock fenders.
Main OEM Considerations
Coilover Requirement for 15x9” and Wider: Wheels 15x9” or wider typically cannot be fitted with factory-diameter springs due to physical interference with the shock spring perch. This is a hard mechanical interference, not a “rubbing” issue. Aftermarket coilovers with 2.25” or 2.5” OD springs are mandatory as they provide the necessary inboard clearance.
Fender Rolling: The front fenders feature a horizontal lip extending 10-15mm inward. For 15x8” wheels with lower offsets (+25mm or less), fender rolling is recommended when lowered. For 15x9” wheels with lower offsets, a “flat roll” will be necessary. For 15x10” wheels, fender pulling or flaring is required. Use a heat gun to warm paint to approximately 140°F and a fender roller tool to fold the lip flat.
Steering Rack Limiters: Wide wheels with higher offsets (15x9” +35mm) push the inner barrel deep into the wheel well. At full steering lock, the inner rim lip contacts the front sway bar or lower control arm. Steering rack limiters are C-shaped spacers (5-6mm thick) that snap onto the steering rack shaft and physically limit travel. This sacrifices approximately 1-2 feet of turning radius but prevents wheel and sway bar damage.
Brake Clearance: The NA6 (1.6L) features compact 235mm brakes that clear almost any 14” or 15” wheel. The NA8 (1.8L) upgraded to 255mm brakes that fit all standard 15” wheels. Retrofitted NB Sport brakes (270mm) generally require 15” wheels. Big brake kits require high-clearance spoke designs and minimum 2-3mm clearance to prevent caliper contact during thermal expansion and wheel flex.
Hub Centric Rings: Most aftermarket 4x100 wheels have 67.1mm or 73.1mm center bores. The NA Miata requires 54.1mm hub centering. Use hub centric rings, 67.1mm or 73.1mm OD to 54.1mm ID depending on your wheel. Aluminum rings are strongly recommended over plastic for track use, as brake heat can deform plastic rings.
Lug Nuts: The NA uses M12x1.5 thread pitch with 60-degree conical seat. Never use ball seat or flat washer seat lug nuts on conical seat wheels. Steel lug nuts are recommended for track use due to resistance to galling and thread fatigue. Torque specification is 86 ft-lbs. Over-torquing can stretch factory studs.
Tire Shoulder Profile: Modern extreme performance summer tires often run significantly wider than their labeled size. A tire labeled as 205/50R15 might measure 215mm or even 220mm in actual section width. Builders must account for this width when calculating fender clearance, particularly when moving from all-season tires to competition compounds.
15” as Standard: The enthusiast community strongly favors 15” diameter for optimal balance of weight, tire selection, cost, and rotational inertia. While 16” and 17” wheels are available, they increase rotational inertia, reduce tire selection in performance compounds, and offer no measurable grip benefit on the NA’s modest power output. Unless you are Ryan Passey stick with 15”s.
Additional Resources
- Detailed Wheel Fitment: See the NA Miata Wheel Guide for comprehensive offset recommendations, brake clearance, suspension geometry, and real-world fitment examples
- Tire Compatibility: See the NA Miata Tire Guide for diameter calculations, tire size charts, and performance category recommendations
Remember: Actual fitment varies based on wheel design (spoke profile, barrel shape), tire selection, suspension setup, ride height, camber, and fender condition. Always verify fitment for your specific combination before purchasing. When in doubt, consult experienced community members on forums such as miataturbo.net or miata.net. All information provided is based on extensive research and decades of community trial and error. Please evaluate and verify fitment data at your own discretion. As always, modify at your own risk. Check clearance during install, after install, and monitor on an ongoing basis. Failure to do so can result in vehicle damage or tire damage which can lead to bodily and emotional damage.