Onyx Forged
FREN

Forged wheels for Mazda MX-5 NB

Onyx Kyoto forged wheel

1998 – 2005

Your original size is made on quotation. Free delivery to 35 European countries. Contact the workshop

Our 45 wheels and their prices

Amounts in pounds: our checkout on 13 November 2026, for the wheels, delivery included (free), before the carrier's clearance fee and any import duty. The amount shown at checkout is the one charged for your order.

Exact measurements, offset, staggered fitment, concavity, another finish or diameter? Our workshop sets it all up with you. Contact the workshop

Technical specifications

Production period
1998-2005

Original fitment measurements: Mazda MX-5 NB

The measurements of the car as delivered new, to identify yours and compare. Each value refers, by a number, to the sources that give it. Our design office works out your offset and submits it to you before machining.

Hub

MeasurementOriginal value
PCD (bolt pattern)4x100 [1, 2, 3]
Centre bore54.1 mm [1, 2, 3]
ThreadM12 x 1.5 [1, 2, 3]
FixingWheel nuts [1, 2, 3]
Bolt or nut seatNot published
Tightening torqueNot published

“Not published”: no source sure enough to show it yet.

Original fitments by version

Version and fitmentFrontRear
DiameterWidthOriginal offset (manufacturer)TyreDiameterWidthOriginal offset (manufacturer)Tyre
Mazda MX-5 NB, 1.6 (81 kW) and 1.8 (102 to 107 kW), soft-top roadster, 14 inches, original equipment14″ [4, 5, 6, 7, 8]5.5J [4, 5, 6, 7, 8]ET 45 [4, 5, 6, 7, 8]185/60 R14 [4, 5, 6, 7, 8]14″ [4, 5, 6, 7, 8]5.5J [4, 5, 6, 7, 8]ET 45 [4, 5, 6, 7, 8]185/60 R14 [4, 5, 6, 7, 8]
Mazda MX-5 NB, 1.6 (81 kW) and 1.8 (102 to 107 kW), soft-top roadster, 14 inches, 6J wheel, original equipment14″ [4, 5]6J [4, 5]ET 40 [4, 5]185/60 R14 [4, 5]14″ [4, 5]6J [4, 5]ET 40 [4, 5]185/60 R14 [4, 5]
Mazda MX-5 NB, 1.6 (81 kW) and 1.8 (102 to 107 kW), soft-top roadster, 15 inches, original equipment15″ [4, 5, 6, 7, 8]6J [4, 5, 6, 7, 8]ET 40 [4, 5, 6, 7, 8]195/50 R15 [4, 5, 6, 7, 8]15″ [4, 5, 6, 7, 8]6J [4, 5, 6, 7, 8]ET 40 [4, 5, 6, 7, 8]195/50 R15 [4, 5, 6, 7, 8]
Mazda MX-5 NB, 1.6 (81 kW) and 1.8 (102 to 107 kW), soft-top roadster, 16 inches, original equipment16″ [6, 7]6.5J [6, 7]ET 40 [6, 7]205/45 R16 [6, 7]16″ [6, 7]6.5J [6, 7]ET 40 [6, 7]205/45 R16 [6, 7]

The offsets are the original ones, given by the manufacturer or by the sources cited; they help you identify your car's fitment.

What Onyx can make for the Mazda MX-5 NB

Custom forged wheels in forged 6061-T6 aluminium, designed to JWL/VIA standards, in monoblock or two-piece construction; three-piece wheels are made on quotation.

The diameters below start at the smallest original diameter recorded on this car (14″) and go up to 24″.

DiameterMonoblock, set of four wheelsTwo-piece, set of four wheels
18″€3,200
Great Britain: £3,271.20 with UK import VAT		€4,300
Great Britain: £4,395.60 with UK import VAT
19″€3,200
Great Britain: £3,271.20 with UK import VAT		€4,300
Great Britain: £4,395.60 with UK import VAT
20″€3,300
Great Britain: £3,373.20 with UK import VAT		€4,400
Great Britain: £4,497.60 with UK import VAT
21″€3,550
Great Britain: £3,628.80 with UK import VAT		€4,750
Great Britain: £4,855.20 with UK import VAT
22″€3,750
Great Britain: £3,832.80 with UK import VAT		€5,200
Great Britain: £5,314.80 with UK import VAT
23″€3,950
Great Britain: £4,038 with UK import VAT		€5,750
Great Britain: £5,877.60 with UK import VAT
24″€4,100
Great Britain: £4,190.40 with UK import VAT		€6,300
Great Britain: £6,439.20 with UK import VAT

Amounts in pounds: our checkout on 13 November 2026, for the wheels, delivery included (free), before the carrier's clearance fee and any import duty. The amount shown at checkout is the one charged for your order.

Wheels delivered in 4 to 8 working weeks, transit time included, from full payment, whether you order on the website or on quotation (or from the agreed deposit, if you asked for one), and at the earliest from your approval of the measurements, the colour or the 3D render you asked for, under article 5.1 of the Terms and Conditions.

Free delivery to 35 European countries (Terms and Conditions, article 5.2).

The offset and width of your wheels do not come from a table: the Onyx Forged design office calculates them for your car and your brakes, and submits them to you before machining.

Configure wheels for the Mazda MX-5 NB

Frequently asked questions: wheels for the Mazda MX-5 NB

What are the original wheel offsets for a Mazda MX-5 NB?

According to its Swiss vehicle type records, the same wheel on all four wheels: 5.5J with an offset of 45 in 14 inches, 6J with an offset of 40 in 15 inches, and 6.5J with an offset of 40 in 16 inches from 2000. The 1998 records also permit a 6J x 14 wheel with an offset of 40. [4, 7]

Which tyres, and which load index, for a Mazda MX-5 NB?

185/60 R14 and 195/50 R15, with a load index of 82 in the 1998 records (475 kg per tyre) and 79 or 80 in those of 2000; 205/45 R16 with a load index of 80, i.e. 450 kg per tyre, on all four wheels. [4, 6, 7, 9, 10]

What load per wheel for a Mazda MX-5 NB?

The highest permissible load in its Swiss vehicle type records is 645 kg on the front axle and 665 kg on the rear axle (1.8, record 1MA597), i.e. 322.5 and 332.5 kg per wheel. The 205/45 R16 tyre with a load index of 80 carries 450 kg. [7, 8, 9, 10]

Which bolt pattern, which centre bore and which wheel nuts for a Mazda MX-5 NB?

The bolt pattern is 4x100, the centre bore 54.1 mm, and the wheels are held by M12 x 1.5 wheel nuts, according to koleso.ee, SCC and wheelfitment.eu, which agree. The tightening torque is not published: the two sources that give it do not agree. [1, 2, 3]

Sources for the measurements and answers

  1. koleso.ee, Mazda MX-5 NB [1998 .. 2005] (secondary source, consulted on 8 November 2026)
  2. SCC Fahrzeugtechnik (spurverbreiterung.de), Mazda MX5, type NB, 1998-2005 (secondary source, consulted on 8 November 2026)
  3. wheelfitment.eu, Mazda MX-5 (1990 - 2005) (secondary source, consulted on 8 November 2026)
  4. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1MA550 (Mazda MX-5 1.6, NB; 186, 81 kW, Offen mit Verdeck / Hardtop, February 1998): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  5. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1MA551 (Mazda MX-5 1.8, NB; 18P, 103 kW, Offen mit Verdeck / Hardtop, February 1998): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  6. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1MA595 (Mazda MX-5 1.6, NB, 81 kW, Offen mit Verdeck / Hardtop, November 2000): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  7. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1MA596 (Mazda MX-5 1.8, NB, 107 kW, Offen mit Verdeck / Hardtop, November 2000): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  8. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1MA597 (Mazda MX-5 1.8, NB;, 102 kW, Offen mit Verdeck / Hardtop, November 2000): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  9. Fiches-auto.fr, tyre load index table (index → kg) (reference table, for a conversion, consulted on 3 October 2026)
  10. UN Regulation No 30 (revision 3), Annex IV, tyre load capacity index table (index → kg), OJ L 201 of 30/07/2008 (reference table, for a conversion, consulted on 8 November 2026)

Each measurement shown comes from a cited source: a manufacturer's document, an official vehicle type record, an original parts catalogue, or two concurring specialist sources. Measurements checked on 8 November 2026 by the Onyx Forged design office.

Custom forged wheels for the Mazda MX-5 NB

  • Forged 6061-T6 aluminium
  • 5-axis CNC machining
  • Designed to JWL/VIA standards
  • Fitment worked out for your Mazda MX-5 NB

MX-5 NB: 4x100, a 54.1 mm hub, M12 x 1.5 wheel nuts

The second-generation Mazda MX-5 (NB), the 81 kW 1.6 or the 102 to 107 kW 1.8, as a soft-top roadster, whose first Swiss vehicle type record dates from February 1998, is 4x100 on a 54.1 mm hub, with M12 x 1.5 wheel nuts: koleso.ee, SCC and wheelfitment.eu give these measurements and agree, each cited in the table. The tightening torque is not published: the two sources that give it do not agree. The MX-5 NC, which succeeded it in 2005, has a different bolt pattern and its own page.

14, 15 or 16 inches, the same wheel on all four wheels

The vehicle type record of the Swiss Federal Roads Office (ASTRA), the document that sets the tyre and wheel combinations a car may carry, permits the same wheel on both axles for the MX-5 NB: 5.5J x 14 with an offset of 45 on 185/60 R14 tyres, or 6J x 15 with an offset of 40 on 195/50 R15 tyres. The February 1998 records also permit a 6J x 14 wheel with an offset of 40 on 185/60 R14 tyres; those of November 2000 add, for the 1.6 and one of the 1.8s, a 6.5J x 16 wheel with an offset of 40 on 205/45 R16 tyres, with the largest front discs: the guide wheels and brakes explains why braking sets the limit on diameter.

A very light car: the load per wheel

The highest permissible load in its records is 645 kg on the front axle and 665 kg on the rear axle, i.e. 322.5 and 332.5 kg per wheel. This is the load the wheel must carry, and the tyre keeps at least the load index of the original fitment: 82 in the 1998 records, 79 or 80 in those of 2000, 80 for the 205/45 R16 (reading a tyre).

What these measurements say about a forged wheel

The offset positions the wheel in the wheel arch: a wider wheel, or a lower offset, brings it closer to the wing. The Onyx Forged design office starts from the measurements on this page, your brakes and your tyres to calculate the width and offset of your wheels, then submits them to you. The offset calculator compares two fitments: it compares, it does not choose the measurement for you.

Roadworthiness test: what is examined

The French roadworthiness test (contrôle technique) examines the wheel without removing it (cracks, deformation, a wheel that protrudes beyond the bodywork) and verifies that the tyre size is one provided for by the manufacturer or accepted as equivalent. Keeping a tyre size from the original fitment, and at least its load index, avoids having to justify it; the details are on the roadworthiness test and registration page.

What we record before machining

Configure your forged wheels for the Mazda MX-5 (NB)

The Onyx Forged design office works out the measurements of your car from its exact version, stated on the registration document, and shows them to you before machining. Each set is cut from forged 6061-T6 aluminium, machined on a 5-axis CNC centre, as monoblock, two-piece or three-piece wheels; our wheels are designed to JWL/VIA standards. Prices by diameter and the lead time are given on this page, under “What Onyx can make”. Start your configuration or write to contact@onyxforgedwheels.com.

Configure custom wheels for your Mazda MX-5 NB: free 3D render, on request.

Useful guides

Other Mazda MX-5 generations

Onyx Forged designs and has wheels made for these generations too. Each one has its own PCD, offsets and sizes: make sure you are on yours.

See all generations of the Mazda MX-5, or all Mazda models.