OX-F5 Petra — monoblock forged wheels for Audi, BMW, Porsche…

In short: OX-F5 Petra: monoblock forged wheels, 18″ to 24″, priced per set of four wheels from €3,200.

The OX-F5 Petra is a monoblock forged wheel with five Y-spokes. Each spoke opens almost at the hub, and its two arms curve as they spread before reaching the rim: the face reads as five large teardrop windows, separated by supple forks, with a small machined opening at the base of each fork. This is what sets it apart from our OX-Y5 Fronde: the Fronde keeps a solid spoke up to mid-radius, then stretches two straight, slim arms; the Petra opens its forks straight away and curves its arms, for a rounder, more enveloping design. The face is concave, and the centre cap, in the colour of the wheel, carries the OX monogram. In satin black, the design reads as one block; in anthracite grey, it takes on a technical look; in satin bronze or brushed silver, the light follows the curve of each arm.

Offered from 18″ to 24″. It suits electric saloons as well as sporty estates and SUVs.

How to order

Choose the diameter and the finish, then give your car's make, model and year: that is all we need to take your order. The Onyx Forged design office works out the measurements and submits them to you before machining.

Price by diameter

Every price is for a set of four wheels; delivery is free to 35 European countries.

OX-F5 Petra: price of a set of four wheels by diameter
Diameter	Set of four wheels
18″	€3,200
19″	€3,200
20″	€3,300
21″	€3,550
22″	€3,750
23″	€3,950
24″	€4,100

Finishes

The finishes in the catalogue for this model, all at the same price for a given diameter:

Satin black
Anthracite grey
Satin bronze
Brushed silver

Another colour, from our palette or from a RAL or other reference, can be made for the whole wheel: the price shown does not change, whatever the colour. Write to customer service.

Cast or forged: what a wheel weighs

Size	Classic cast	Forged monoblock
17″	9–11 kg	6.5–8 kg
18″	10–12 kg	7.5–9 kg
19″	11–14 kg	8.5–10.5 kg
20″	13–16 kg	9.5–12 kg
21–22″	15–19 kg	11–14 kg
23–24″	18–22 kg	13–16.5 kg

Indicative values, for one wheel. The exact weight depends on the design, the width and the offset.

Engineering and specifications

Material: forged 6061-T6 aluminium; forging closes up the porosity that a cast wheel can retain.
Construction: monoblock, 5-axis CNC machined from a single piece. The same design can be studied as a two-piece or three-piece wheel, on quotation from customer service.
Measurements: PCD (bolt pattern), offset (ET) and centre bore machined for your car, to the measurements the Onyx Forged design office submits to you before machining; no spacers or spigot rings to add.
Standards: wheels designed to JWL/VIA standards.
Packaging: set of four wheels.

Have a sketch or an idea for a design? Customer service replies with a quotation, and the Onyx Forged design office draws your wheel to your car's measurements.

Delivery, payment and warranty

Delivered in 4 to 8 working weeks, transit time included, from full payment, 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. Payment when you order on the website. At checkout, you pay by card or by bank transfer; Klarna is also offered, depending on your country and subject to acceptance. Card limit too low? Choose bank transfer at checkout. Free delivery to mainland France (including Corsica), Monaco, the whole European Union, Switzerland, the United Kingdom, Norway, Iceland, Andorra, San Marino and Liechtenstein, and to the French overseas departments and territories on quotation, which sets the delivery time. For a delivery subject to customs (overseas departments and territories, Switzerland, Great Britain…), import duties, taxes and customs clearance fees are paid by the recipient. Terms and Conditions.

5-year Onyx Forged commercial warranty from the date of delivery, covering manufacturing and material defects and structural failures not caused by abnormal use. This warranty is in addition to your statutory rights.

Their reviews of this model.

11 reviews collected earlier from customers of this model, reproduced here, newest first.

Average rating: 4.8 out of 5 · 11 reviews

5 stars: 9
4 stars: 2

Je restaure une 964 et je cherchais un dessin qui respecte la voiture tout en étant moderne. La Petra est exactement ça. Finition impeccable, délai tenu.

Rating: 5 out of 5

Nicolas V.
Review published in November 2026
Jantes superbes, conformes, aucun défaut. Le transporteur a traîné, presque deux semaines de plus que la date annoncée, d'où l'étoile en moins.

Rating: 4 out of 5

Hélène R.
Review published in October 2026
Cotes validées par mail, rendu 3D sur ma E46 M3 avant l'usinage, photos avant l'envoi : tout a été carré. Noir satiné parfaitement régulier. merci à l'équipe pour le suivi.

Rating: 5 out of 5

Julien P.
Review published in September 2026
Commande depuis la Suisse, transporteur tracé et assuré comme indiqué, aucune mauvaise surprise. Les jantes sont très bien finies et le montage s'est fait sans adaptation sur ma Giulia.

Rating: 5 out of 5

Markus K.
Review published in August 2026
Petra in satin bronze on my E39 M5. Classic look, modern build quality, very clean machining. Lead time matched the quote and packaging was excellent.

Rating: 5 out of 5

Lukas B.
Review published in July 2026
petra gris anthracite sur ma 997, elles sont nickel. montees direct sans bague, aucune vibration. tres bon suivi par mail

Rating: 5 out of 5

Romain L.
Review published in June 2026
Un dessin intemporel et une exécution d'une grande propreté. Le bureau d'études a soumis les cotes avant l'usinage et les jantes livrées y correspondent précisément.

Rating: 5 out of 5

Agnès D.
Review published in May 2026
Produit parfait, je le précise. L'étoile en moins est pour le transporteur : un carton enfoncé sur un angle et un livreur qui n'a pas sonné. La housse a protégé la jante.

Rating: 4 out of 5

Maxence B.
Review published in April 2026
Petra sur ma 911 Targa 🔥 Sobre, classe, parfaitement finie.

Rating: 5 out of 5

Léa M.
Review published in March 2026
Reçu mes Petra, elles sont vraiment magnifique sur ma Mercedes SL. Le montage c'est fait sans problème et le délai a été respecté.

Rating: 5 out of 5

Guillaume H.
Review published in January 2026
Intemporelle. Propre. Légère. Cotes exactes. Délai tenu. Validé.

Rating: 5 out of 5

Pierre L.
Review published in November 2025

All reviews received are published, with no filtering by rating. How we check reviews

Questions about the OX-F5 Petra

Will the OX-F5 Petra fit my car?

It is machined to your car's measurements. Give your car's make, model and year when you order: the Onyx Forged design office works out the PCD (bolt pattern), the offset (ET) and the centre bore, and submits them to you before machining. No spacers or spigot rings are needed. Our guides: PCD, bolt pattern and centre bore and brake caliper clearance.

What tyre size goes with a bigger wheel?

Our tyre size calculator compares your original tyre with a size for the new rim diameter: overall diameter, sidewall height and speedometer error, against the ETRTO tolerance. Your vehicle handbook, the tyre placard and your insurer have the final say. Our guide: How to read a tyre size (and the load and speed index).

Does the finish change the price of the OX-F5 Petra?

No. Every finish listed on this page costs the same for a given diameter, and another colour, from our palette or from a RAL or other reference, does not change the price shown either.

The other models

All the models in the catalogue · The monoblock construction

The same model, make by make

Each set is machined for a specific vehicle: the pages below bring together the models and generations already covered, make by make.

Guides and tools

Read before you choose, or check a fitment yourself:

All our guides · All tools