ND MX-5 Wheel and Tire Fitment Guide

The ND MX-5 runs a 4×100 bolt pattern, a 54.1mm hub bore, and 12×1.5 conical-seat lugs. The fender openings are narrow and the suspension geometry is tight, so fitment is less forgiving than the chassis weight suggests. This page covers what bolts on, what needs fender work, and where the Brembo package rules choices out.

Factory Specifications

Parameter	ND1/ND2 Sport/Club	ND1/ND2 GT	Notes
Wheel size	16×6.5 ET45	17×7 ET45	Both are 4×100
Tire size	195/50R16	205/45R17	OEM tire varies by year
Hub bore	54.1mm	54.1mm	Hub-centric rings needed for non-OEM
Lug pattern	4×100	4×100	Common pattern
Lug type	12×1.5 thread, conical seat	Same	Verify seat type on aftermarket wheels

The 4×100 pattern is the same one used across decades of Hondas and older Miatas, so wheel selection is wide. The 54.1mm bore is small, which matters when you order — see the hub-centric ring note below.

Common Aftermarket Fitments

15-Inch (Autocross / Light Track)

Size	Tire	Use Case	Notes
15×7 ET35	205/50R15	Autocross, light track	Confirm brake clearance (Brembo: no)
15×8 ET35	225/45R15	Autocross	Popular competitive fitment; may need fender work

15-inch wheels do not clear the Brembo front package (ND Club with the BBS/Brembo/Recaro option, and the GT Brembo option). The four-piston front caliper is too tall. Verify your caliper before buying 15s. 15s are popular for autocross because the 200-treadwear options run wider and cheaper in small diameters. See /nd-miata/autocross-tires/ for current 15-inch tire choices.

16-Inch (Street / Autocross)

Size	Tire	Use Case	Notes
16×7 ET40-45	205/50R16	Street, light track	Direct OEM+ fitment
16×8 ET40	225/45R16	Autocross, track	Slightly wider than stock; no modification needed

17-Inch (Street / Track)

Size	Tire	Use Case	Notes
17×7.5 ET40-45	215/45R17	Street, track	Good balance of width and clearance
17×8 ET40-45	225/45R17 or 235/40R17	Track, aggressive street	Check inner fender clearance
17×9 ET45	245/40R17	Track, requires modification	May need fender rolling or pull

Offset and Width Guidelines

Width	Recommended Offset	Result
6.5” (stock)	ET45	Factory fitment
7”	ET40-45	Slightly outward; no issue
7.5”	ET38-45	Good balance
8”	ET35-45	Check clearance; may need minor adjustment
9”	ET45+	Tight fitment; may require fender work

Lower offset (more outward) increases the risk of rubbing on the outer fender lip. Higher offset (more inward) increases the risk of inner fender or suspension contact. On a car this light, an aggressive offset rarely buys you anything you can feel — pick the offset that clears, not the one that pokes.

Clearance Considerations

Brake Clearance

Stock brakes: 15-inch wheels fit; verify the specific wheel’s spoke design clears the caliper.
Brembo package (Club BBS/Brembo/Recaro, GT Brembo option): Minimum 16-inch. Most 16” wheels clear; verify spoke design.
Aftermarket BBK: Confirm minimum wheel diameter with the kit maker. See /nd-miata/big-brake-kit/.

Fender Clearance

Stock ride height: 16×8 ET40 with 225/45R16 fits without modification.
Lowered 1–1.5 inches: Wider fitments may need fender rolling.
Lowered 1.5+ inches: Likely needs fender rolling and careful tire selection.

Lowering shifts the tire up into the narrowest part of the arch, so clearance is a function of ride height as much as width. If you’re running coilovers, set ride height first and check clearance at full lock and full compression before committing to a wide tire. See /nd-miata/suspension-coilovers/.

Suspension Clearance

Front: Inner fender liner and control arm proximity at lock.
Rear: Shock body proximity, especially under compression.
Coilovers move the clearance points relative to stock suspension.

Tire Diameter Considerations

Keep overall tire diameter within roughly 3% of stock to preserve:

Speedometer accuracy
Arch clearance (taller = more likely to rub)
Gearing feel

Wheel/Tire	Diameter	vs. Stock 16”	vs. Stock 17”
195/50R16 (stock 16)	23.7”	Baseline	-0.6”
205/45R17 (stock 17)	24.3”	+0.6”	Baseline
205/50R16	24.1”	+0.4”	-0.2”
225/45R16	23.9”	+0.2”	-0.4”
225/45R17	24.9”	+1.2”	+0.6”
245/40R17	24.7”	+1.0”	+0.4”
205/50R15	23.1”	-0.6”	-1.2”

Weight Considerations

The ND is sensitive to unsprung weight. Dropping rotating mass at each corner is felt in steering response and ride compliance more than almost any other bolt-on. A 5–7 lb per-corner reduction is noticeable over bumps and in turn-in.

Category	Typical Weight (17×7.5)	Examples
Forged (lightweight)	14–16 lb	Rays 57CR, Konig Hypergram
Flow-formed	16–19 lb	Enkei TS-V, Konig Ampliform
Cast (standard)	19–23 lb	Most budget options
OEM (GT 17×7)	~18.5 lb	Factory wheel

Popular Wheel Choices

Wheel	Size	Weight	Use Case
Enkei RPF1	15×7, 16×7, 17×7.5	10–14 lb	Track, autocross (proven lightweight)
Rays 57CR	15×8, 16×7, 17×8	11–15 lb	Track, premium
Konig Hypergram	15×7.5, 16×8, 17×8	12–16 lb	Budget lightweight
Advanti Storm S1	15×7, 15×8	10–12 lb	Autocross budget
OZ Ultraleggera	17×7.5, 17×8	15–17 lb	Street/track premium look

The Enkei RPF1 is the default answer in the Miata community for a reason: it’s cheap, it’s light, and it comes in nearly every ND-relevant size. For more on building a track-focused wheel and tire setup, see /nd-miata/lightweight-wheels/ and /nd-miata/track-tires/.

Hub-Centric Rings

The ND hub measures 54.1mm. Most aftermarket wheels are bored larger (73.1mm is common) to fit many platforms. Hub-centric rings center the wheel on the hub instead of relying on the lugs, which eliminates vibration:

Ring outer diameter: matches the wheel bore (e.g., 73.1mm)
Ring inner diameter: 54.1mm (ND hub)
Material: aluminum or high-strength plastic
Always run rings unless the wheel’s bore is exactly 54.1mm

Lug Nuts

Stock lugs are 12×1.5 thread with a conical (60-degree) seat. When fitting aftermarket wheels, confirm:

Thread pitch matches (12×1.5)
Seat type matches the wheel (conical vs. ball seat vs. flat with washer)
Length is correct — enough thread engagement without bottoming out in the wheel
Wheel locks if desired (one per corner)