Onyx Forged
FREN

Forged wheels for BMW Z4 E85 and E86

Onyx Kyoto forged wheel

2002 – 2008

All our wheels in 18 and 19″, made to your car's measurements. From €3,200 for a set of 4 in 18″. Free delivery to 35 European countries.

Great Britain: from £3,271.20 with UK import VAT, delivery included

Sizes offered: 18″ · 19″. Prices below in 18″.

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
2002-2008

Original fitment measurements: BMW Z4 E85 and E86

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)5x120 [1, 2, 3, 4, 5]
Centre bore72.6 mm [1, 2, 3, 4, 5]
ThreadM12 x 1.5 [1, 2, 3, 4, 5]
FixingWheel bolts [1, 2, 3, 4, 5]
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
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 16 inches, original equipment16″ [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]7J [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]ET 47 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]225/50 R16 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]16″ [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]7J [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]ET 47 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]225/50 R16 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 17 inches, staggered fitment (2003 records), original equipment17″ [6, 7, 17]8J [6, 7, 17]ET 47 [6, 7, 17]225/45 R17 [6, 7, 17]17″ [6, 7, 17]8.5J [6, 7, 17]ET 50 [6, 7, 17]245/40 R17 [6, 7, 17]
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 17 inches, staggered fitment (2.2i, 2.5i and 3.0i of 2005), original equipment17″ [9, 10, 18]8J [9, 10, 18]ET 47 [9, 10, 18]225/45 R17 [9, 10, 18]17″ [9, 10, 18]8.5J [9, 10, 18]ET 50 [9, 10, 18]255/40 R17 [9, 10, 18]
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 17 inches, staggered fitment (3.0si roadster and coupé), original equipment17″ [19, 20, 21, 22]8J [19, 20, 21, 22]ET 46 [19, 20, 21, 22]225/45 R17 [19, 20, 21, 22]17″ [19, 20, 21, 22]8.5J [19, 20, 21, 22]ET 50 [19, 20, 21, 22]255/40 R17 [19, 20, 21, 22]
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 17 inches, staggered fitment (2.0i, 2.5i and 2.5si from 2005 to 2007), original equipment17″ [8, 11, 12, 13, 14, 15, 16]8J [8, 11, 12, 13, 14, 15, 16]—225/45 R17 [8, 11, 12, 13, 14, 15, 16]17″ [8, 11, 12, 13, 14, 15, 16]8.5J [8, 11, 12, 13, 14, 15, 16]ET 50 [8, 11, 12, 13, 14, 15, 16]255/40 R17 [8, 11, 12, 13, 14, 15, 16]
Z4 roadster 2.0i, 2.2i, 2.5i, 2.5si, 3.0i and 3.0si, and Z4 coupé 3.0si (110 to 195 kW), 18 inches, staggered fitment, original equipment18″ [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]8J [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]ET 47 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]225/40 R18 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]18″ [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]8.5J [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]ET 50 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]255/35 R18 [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]
Z4 M roadster and Z4 M coupé (252 kW), 18 inches, staggered fitment, original equipment18″ [23, 24]8J [23, 24]ET 42 [23, 24]225/45 R18 [23, 24]18″ [23, 24]9J [23, 24]ET 30 [23, 24]255/40 R18 [23, 24]

“—”: no source sure enough to show it yet. 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 BMW Z4 E85 and E86

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 (16″) 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 BMW Z4 E85 and E86

Frequently asked questions: wheels for the BMW Z4 E85 and E86

What are the original wheel offsets for a BMW Z4 E85 or E86?

According to its Swiss vehicle type records: 7J with an offset of 47 at all four corners in 16 inches; in 17 and 18 inches, a staggered fitment, 8J with an offset of 47 (46 for the 3.0si in 17 inches) at the front and 8.5J with an offset of 50 at the rear. The Z4 M has its own staggered fitment in 18 inches: 8J with an offset of 42 at the front, 9J with an offset of 30 at the rear. [6, 19, 23]

Which tyres, and which load index, for a BMW Z4 E85 or E86?

In 16 inches, 225/50 R16 with a load index of 92 at all four corners, i.e. 630 kg per tyre; in 18 inches, 225/40 R18 with a load index of 88 at the front, i.e. 560 kg, and 255/35 R18 with a load index of 90 at the rear, i.e. 600 kg. For the Z4 M, 225/45 R18 at the front and 255/40 R18 at the rear, with no load index in its record. [6, 23, 25, 26]

What load per wheel for a BMW Z4 E85 or E86?

The highest permissible load in its Swiss vehicle type records is 790 kg on the front axle and 890 kg on the rear axle (Z4 3.0si coupé, records 1BB392 and 1BB562), i.e. 395 and 445 kg per wheel; for the Z4 M coupé (record 1BB393), 855 and 935 kg, i.e. 427.5 and 467.5 kg per wheel. The 255/35 R18 rear tyre with a load index of 90 carries 600 kg. [20, 22, 24, 25, 26]

Which bolt pattern, which centre bore and which bolts for a BMW Z4 E85 or E86?

The bolt pattern is 5x120, the centre bore 72.6 mm, and the wheels are held by M12 x 1.5 wheel bolts, Z4 M included, according to koleso.ee and SCC. The tightening torque is not published: the sources consulted do not agree. [1, 2, 3, 4, 5]

Same fixing measurements

As original equipment, these cars have the same PCD, centre bore, thread and fixing as the BMW Z4 E85 and E86: PCD 5x120, centre bore 72.6 mm, thread M12 x 1.5, fixing: wheel bolts.

Same fixing measurements; original diameters and offsets: see each car's page. Bolt seat, width and brake clearance: our design office checks them for your car before machining.

Sources for the measurements and answers

  1. koleso.ee, BMW Z4 I (E85) [2002 .. 2005] (secondary source, consulted on 8 November 2026)
  2. SCC Fahrzeugtechnik (spurverbreiterung.de), BMW Z4 (E85), type Z85, 2002-2006 (secondary source, consulted on 8 November 2026)
  3. koleso.ee, BMW Z4 I (E85/E86) LCI [2006 .. 2008], including the M 3.2i (secondary source, consulted on 8 November 2026)
  4. SCC Fahrzeugtechnik (spurverbreiterung.de), BMW Z4 M Coupe (E85), type M85, 2006-2008 (secondary source, consulted on 8 November 2026)
  5. SCC Fahrzeugtechnik (spurverbreiterung.de), BMW Z4 M Roadster (E85), type M85, 2006-2008 (secondary source, consulted on 8 November 2026)
  6. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB196 (BMW Z4 Roadster 2.5i, Z85; BT31, 141 kW, Offen mit Verdeck / Hardtop, February 2003): 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. 1BB237 (BMW Z4 Roadster 2.2i, Z85; BT11, 125 kW, Offen mit Verdeck / Hardtop, September 2003): 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. 1BB323 (BMW Z4 Roadster 2.0i, Z85; BZ11, 110 kW, Offen mit Verdeck / Hardtop, April 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  9. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB324 (BMW Z4 Roadster 2.2i, Z85; BT11, 125 kW, Offen mit Verdeck / Hardtop, April 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  10. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB325 (BMW Z4 Roadster 2.5i, Z85; BT31, 141 kW, Offen mit Verdeck / Hardtop, April 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  11. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB384 (BMW Z4 Roadster 2.5i, Z85; BU11, 130 kW, Offen mit Verdeck / Hardtop, December 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  12. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB385 (BMW Z4 Roadster 2.5si, Z85; BU31, 160 kW, Offen mit Verdeck / Hardtop, December 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  13. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB387 (BMW Z4 Roadster 2.0i, Z85; BZ11, 110 kW, Offen mit Verdeck / Hardtop, December 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  14. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB558 (BMW Z4 Roadster 2.0i, Z85; BZ11, 110 kW, Offen mit Verdeck / Hardtop, October 2007): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  15. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB559 (BMW Z4 Roadster 2.5i, Z85; BU11, 130 kW, Offen mit Verdeck / Hardtop, October 2007): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  16. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB560 (BMW Z4 Roadster 2.5si, Z85; BU31, 160 kW, Offen mit Verdeck / Hardtop, October 2007): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  17. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB197 (BMW Z4 Roadster 3.0i, Z85; BT51, 170 kW, Offen mit Verdeck / Hardtop, February 2003): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  18. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB326 (BMW Z4 Roadster 3.0i, Z85; BT51, 170 kW, Offen mit Verdeck / Hardtop, April 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  19. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB386 (BMW Z4 Roadster 3.0si, Z85; BU51, 195 kW, Offen mit Verdeck / Hardtop, December 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  20. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB392 (BMW Z4 3.0si Coupé, Z85; DU51, 195 kW, Limousine, March 2006): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  21. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB561 (BMW Z4 Roadster 3.0si, Z85; BU51, 195 kW, Offen mit Verdeck / Hardtop, October 2007): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  22. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB562 (BMW Z4 3.0si Coupé, Z85; DU51, 195 kW, Limousine, October 2007): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  23. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB383 (BMW Z4 M Roadster, M85; BT91, 252 kW, Offen mit Verdeck / Hardtop, December 2005): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  24. Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BB393 (BMW Z4 M Coupé, M85; DU91, 252 kW, Limousine, March 2006): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 8 November 2026)
  25. Fiches-auto.fr, tyre load index table (index → kg) (reference table, for a conversion, consulted on 3 October 2026)
  26. 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 BMW Z4 E85 and E86

  • Forged 6061-T6 aluminium
  • 5-axis CNC machining
  • Designed to JWL/VIA standards
  • Fitment worked out for your BMW Z4 E85 and E86

Z4 E85 and E86: 5x120, a 72.6 mm hub, M12 x 1.5 bolts

The first BMW Z4, roadster (E85) from the 2.0i to the 3.0si, coupé (E86) 3.0si and Z4 M, whose first Swiss vehicle type record dates from February 2003, is 5x120 on a 72.6 mm hub, with M12 x 1.5 wheel bolts: koleso.ee and SCC give these measurements, Z4 M included, each cited in the table. The tightening torque is not published: the sources consulted do not agree. The Z4 E89, which succeeds it, keeps the bolt pattern and has its own page.

16 inches at all four corners, 17 and 18 inches as a staggered fitment

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 on the Z4 E85 and E86 a 7J x 16 wheel with an offset of 47 on both axles, fitted with 225/50 R16 tyres. In 17 and 18 inches, the fitment is staggered: 8J with an offset of 47 at the front, 8.5J with an offset of 50 at the rear, on 225/40 R18 and 255/35 R18 tyres for the 18-inch fitment. In 17 inches, the rear tyre changes from 245/40 R17 to 255/40 R17 from the 2005 records onwards, and the front wheel of the 3.0si has an offset of 46; some records permit 46 or 47 at the front, and the table then leaves the cell blank.

The Z4 M: 8J and 9J in 18 inches

The Z4 M, the 252 kW roadster and coupé, has its own staggered fitment: 8J x 18 with an offset of 42 at the front on 225/45 R18 tyres, 9J x 18 with an offset of 30 at the rear on 255/40 R18 tyres, according to its two records of December 2005 and March 2006.

The load per wheel

The highest permissible load in the records of the Z4 E85 and E86 is 790 kg on the front axle and 890 kg on the rear axle (3.0si coupé), i.e. 395 and 445 kg per wheel; that of the Z4 M coupé is 855 and 935 kg, i.e. 427.5 and 467.5 kg per wheel. This is the load the wheel must carry, and the tyre keeps at least the load index of the original fitment: 92 for the 225/50 R16, 88 for the front 225/40 R18, 90 for the rear 255/35 R18 (reading a tyre). Braking sets the smallest possible wheel diameter: the guide wheels and brakes explains why.

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 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 BMW Z4 (E85/E86)

Our design office establishes your car's measurements from its exact version, stated on the registration certificate, and presents them to you before machining. Each set is cut from forged 6061-T6 aluminium, machined on a 5-axis CNC centre, in monoblock, two-piece or three-piece construction; 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 BMW Z4 E85 and E86: free 3D render, on request.

Useful guides

Other BMW Z4 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 BMW Z4, or all BMW models.