WheelOffset

1999 Mazda MX-5 Miata Wheel Offset

Quick specs

Wheel size
6x14 · 6x15 · 6.5x16 · 7x17
Offset
ET40 · ET42 · ET38
Backspacing
4.57 in · 4.90 in · 5.00 in
Bolt pattern
4×100
Center bore
54.1 mm
Thread
M12×1.5
Tire size
185/60R14 · 195/50R15 · 205/45R16 · 205/40R17

OEM configurations

ConfigurationRimOffsetBackspacingTireBolt patternCenter boreThread
1.8i · I4, Petrol6x14ET404.57 in185/60R144x10054.1 mmM12 x 1.5
1.8i · I4, Petrol6x15ET404.57 in195/50R154x10054.1 mmM12 x 1.5
1.8i · I4, Petrol6.5x16ET424.90 in205/45R164x10054.1 mmM12 x 1.5
1.8i · I4, Petrol7x17ET385.00 in205/40R174x10054.1 mmM12 x 1.5

Wheels and hardware

More on Amazon

  • No exact catalog match in inventory

    Use Search Amazon with the vehicle requirement.

    Search Amazon

Lug hardware

More on Amazon

  • White Knight Chrome M12x1.50 Bulge Acorn Lug Nut, 20 Count

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

  • White Knight 3807BK-20AM Black Chrome M12x1.50 Spline Lug Nut, 20 items

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

Wheel locks

More on Amazon

  • MCGARD Chrome Cone Seat M12 x 1.5 Wheel Locks

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

  • Gorilla Automotive Wheel Locks With Washer (M12x1.50)

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

Real-World 1999 Mazda MX-5 Miata Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

  • 16-inch — 2 documented builds

2 documented builds.

1999 Mazda MX-5 Miata custom wheel setup

Staggered · 16×8 ET0 / 16×9 ET13

Documented on a 1999 Mazda MX-5 Miata build — observed custom fitment, not a universal fit guarantee.

Wheel: SSR SP1-R

Front
16×8 ET0 · 205/40R16
Rear
16×9 ET13 · 215/45R16
Compared with OEM

Compared with the 16×6.5 ET42 OEM configuration. Calculated geometry only — not fit confirmation.

  • Outer edge 61 mm farther toward fender (more outward poke)
  • Inner edge 23 mm farther from suspension (more inner clearance)
  • Width +1.5" vs OEM
View full build on Modified1
1999 Mazda MX-5 Miata custom wheel setup

Staggered · 16×8 ET0 / Rear unknown

Documented on a 1999 Mazda MX-5 Miata build — observed custom fitment, not a universal fit guarantee.

Wheel: Sportmax 002

Front
16×8 ET0 · 205/40R16
Rear
—
Compared with OEM

Compared with the 16×6.5 ET42 OEM configuration. Calculated geometry only — not fit confirmation.

  • Outer edge 61 mm farther toward fender (more outward poke)
  • Inner edge 23 mm farther from suspension (more inner clearance)
  • Width +1.5" vs OEM
View full build on Modified1

Compare your own setup

See how a different width or offset sits versus an OEM configuration for this year.

Open full fitment calculator

More specs for the 1999 Mazda MX-5 Miata

Each OEM row is a catalog configuration. Offset ranges are not collapsed when the database has exact setups. Documented aftermarket builds are observed setups only — not universal fit or clearance confirmation.