Quantum44 ZF-6 Two Piece Forged Wheels

Quantum44 ZF-6 Two Piece Forged Wheels — UK Full Forged

The Quantum44 ZF-6 Two Piece is a two-piece full billet forged wheel — the deepest concave design in the ZF range — an eight-spoke show-grade forged wheel for builds where visual depth is the priority. The ZF-6 Two Piece separates the forged face from a separately manufactured barrel, enabling deeper concave profiles and rim widths beyond the practical limit of single-piece machining. Quantum44 builds every set to order at its UK facility, specifying diameter, width, offset, PCD, and finish to the customer's exact brief. The ZF-6 carries Quantum44's standard forged specification: 6061-T6 aluminium, multi-axis CNC machining, and structural testing to European load standards.

Available Sizes

• Diameters: 13" | 14" | 15" | 16" | 17" | 18" | 19" | 20" | 21" | 22" | 23" | 24"
• Available Widths: 8.0" – 14.0"
• Standard catalogue sizes: 18", 19", 20", 21", 22"
• PCD options: 5×112, 5×120, 5×114.3, 5×130 — standard; any PCD — built to order
• Offset (ET): Multiple ET options; staggered front/rear configurations supported
• Centre bore: Hub-centric, sized to vehicle specification

Need a Different Size or Bolt Pattern?

The ZF-6 Two Piece Forged is available beyond the standard catalogue. If your vehicle requires a specific diameter, width, offset, or PCD not listed, contact us at [email protected] and we will confirm availability and lead time. We also offer an AI Wheel Design Service if you want a custom spoke concept or finish visualised before production begins.

Technical Specifications

• Manufacturing process: Two Piece
• Material: 6061-T6 aerospace-grade forged aluminium billet
• Machining: Multi-axis CNC — face, spokes, and hub flanges in one programme
• Yield strength: ≥276 MPa (standard for 6061-T6 solution heat-treated and aged)
• Design: a deep concave eight-spoke design — the most visually aggressive in the ZF range. Spokes are wide at the base, thinning progressively, with machined recesses between each pair that deepen the concave bowl. The ZF-6 is the range's show-grade design.
• Finish: The ZF-6 Two Piece is finished to client specification. Options include gloss or satin painted (any RAL/BS colour), brushed with anodising, polished face with painted barrel, and full polished. Two-piece construction allows independent finishing of face and barrel.
• Hub-centric fit: Yes — bore machined to vehicle hub diameter
• Origin: Manufactured in England, United Kingdom

ZF-6 Two Piece Forged — Design & Engineering Detail

The ZF-6 achieves its concave depth through a deeper barrel offset relative to the face plane — in monoblock form this requires a longer machining envelope, and in two-piece form the barrel step depth is set independently. The eight-spoke count provides sufficient rim support at the deep concave geometry, where additional spokes are needed to maintain rim stiffness when the face is recessed significantly inward.

Why Full Billet Forged? The Technical Case

Full billet forging starts with a solid block of 6061-T6 aluminium. Under high press tonnage, the billet is shaped, establishing a grain structure aligned with the finished part's stress paths. Subsequent CNC machining removes material to achieve the final geometry. The result is a wheel with no porosity, no inclusions, and a consistent grain structure — properties that cannot be replicated in cast, semi-cast, or flow-formed processes. Yield strength exceeds 276 MPa, compared to 180–220 MPa in gravity-cast alloys. Billet forging is the manufacturing process used in motorsport, aerospace structural components, and the top tier of the custom wheel industry. The weight reduction vs. cast is real and measurable: a forged 20×10 monoblock typically runs 1.5–2.5 kg lighter than a cast equivalent in the same design, reducing unsprung rotating mass and improving the entire dynamics envelope — steering response, braking stability, ride quality, and acceleration.

ZF-6 Two Piece Design Language

The ZF-6 is the most visually extreme design in the Quantum44 forged range. Eight wide spokes sweep into a deeply concave face profile — the deepest concave of any ZF model — with machined recesses between spoke pairs that reinforce the impression of a wheel receding into the hub. The spoke width at the base is deliberately exaggerated, creating a solid-feeling lower section that transitions abruptly into the rim lip. The concave depth of the ZF-6 is not achievable in a single-piece conventional casting — it requires the forging and machining process that only billet production enables. At the concave's deepest point, the face is set back substantially from the rim plane, which creates a pronounced shadow under most lighting conditions that makes the wheel appear three-dimensional in ways that a flat or mildly dished design cannot. The ZF-6 is Quantum44's statement piece — the model that defines the brand's technical capability and visual ambition. It is equally at home on a show car running a full air suspension slam setup and on a track-prepped vehicle where the wide spoke base provides genuine structural advantage under lateral load. In two-piece form, the ZF-6 face gains additional aesthetic flexibility: the barrel is manufactured separately, allowing deeper concave profiles and wider reverse lips than single-piece machining permits. The face design remains identical to the Monoblock version, but the two-piece assembly means the barrel offset can be adjusted during the build rather than fixed at manufacturing stage.

ZF-6 Two Piece: Two-Piece Construction Advantages

The ZF-6 Two Piece achieves a concave depth that is not physically possible in a single-piece wheel at this diameter. The face is machined with maximum forward concave, and the barrel is manufactured as a separate deep-lip component that provides the structural connection to the hub face and tyre bead seat. The assembly creates a stepped cross-section — face plane and barrel lip at significantly different depths — that is the defining visual character of an extreme concave build. For show car applications this is precisely the specification required. The ZF-6 Two Piece in maximum concave configuration is produced to order; current available concave depth range and the maximum lip width achievable at each diameter should be confirmed with Quantum44 before ordering. Fitment at extreme concave typically requires a vehicle with modified wheel arches, air suspension, and careful attention to tyre sidewall clearance. Hodoor can advise on fitment feasibility for your specific vehicle — contact [email protected] with your wheel arch dimensions.

ZF-6 Two Piece Target Platforms

The ZF-6 Two Piece is the specification for show cars and extreme concave builds. The visual result — a deep concave face against a long-lip barrel — is the defining characteristic of UK-style extreme fitment. Target applications include air-ride BMW M6/M8, full-custom Lamborghini Urus on widened arches, and VIP-style Japanese import saloons on 5x114.3. The Two Piece construction of the ZF-6 unlocks concave depths not achievable in single-piece machining; the exact maximum depth available depends on the target diameter and width. Hodoor will liaise with Quantum44 on your behalf to confirm the maximum concave achievable for your specification — contact [email protected] before ordering.

Vehicle Fitment Guide — Platforms the ZF-6 Two Piece Forged Was Designed For

The ZF-6 Two Piece Forged is built to order and fits any platform — PCD, offset, and centre bore are specified at order. Most commonly fitted to:

• BMW M-series: M3, M4, M5, M8 — 5×120; the ZF-6 suits performance platforms where the spoke design's structural and aesthetic character is a primary consideration
• Audi RS-series: RS4, RS5, RS6, RS7 — 5×112; confirm ET against wide-arch body kit if applicable
• Porsche: 911 (991, 992), Cayenne — 5×112 or 5×130 depending on model year and variant
• Mercedes-Benz AMG: C63, E63, S63, AMG GT — 5×112; common for track-oriented builds
• Custom / bespoke: Lamborghini, Ferrari, McLaren — centre-lock and custom-PCD variants available on request

Correct fitment is the buyer's responsibility — verify PCD, ET, centre bore, and tyre size against your vehicle specification before ordering. Hodoor World offers a pre-order fitment advisory service on request.

Other Bolt Patterns — Available to Order

In addition to the standard PCDs, the ZF-6 Two Piece Forged is available in the following bolt patterns to order:

• 5×108 — Ford ST/RS, Volvo V40/V60/V90, Jaguar F-Type, Citroën DS
• 5×114.3 — Honda Civic Type R, Lexus IS/RC, Nissan 370Z/GT-R, Infiniti Q50, Kia Stinger, Hyundai i30N
• 5×120 — BMW, Rolls-Royce, Land Rover Defender, Range Rover
• 5×130 — Porsche 911 (all variants), Cayenne (pre-2018), Panamera
• 5×112 — Audi, Mercedes-Benz, Volkswagen, Lamborghini (some models)
• Centre-lock — Porsche GT3/GT3 RS, Ferrari, Lamborghini — specify on enquiry

Non-standard PCD lead time is typically 4–6 weeks. Contact [email protected] with your vehicle details.

How the ZF-6 Two Piece Forged Compares

Explore the Quantum44 Lineup at Hodoor World

• Quantum44 ZF-1 Monoblock — full forged ZF-1 monoblock
• Quantum44 ZF-2 Monoblock — a five-spoke split forged design that bridges the gap between a traditional multi-spoke and a twin-spoke aesthetic
• Quantum44 ZF-3 Monoblock — a seven-spoke forged monoblock with a clean, restrained profile suited to executive and GT platforms
• Quantum44 ZF-6 Monoblock — same design in one-piece monoblock — lighter, more rigid
• Quantum44 SFF-2 — flow forged alternative — 20–21", three finishes, immediate availability
• Browse all forged wheels at Hodoor World

Can't Find the Right Wheel? Order Custom Forged

If the ZF-6 Two Piece Forged is close but not quite right — different finish, unusual offset, or a spoke pattern beyond the Quantum44 catalogue — Hodoor offers a custom forged wheel manufacturing service. We work with Quantum44 and other UK and European manufacturers to build one-off and short-run sets to exact specification. Lead time typically 4–8 weeks. You can also use our AI Wheel Design Service to visualise your concept before production begins.

How to Order

1. Contact Hodoor — email [email protected] with your vehicle make/model/year, required diameter, width, offset, and PCD
2. Specify your finish — colour, texture, and hardware finish confirmed in writing before production begins
3. Receive a quote and lead time — Quantum44 provides a confirmed build spec and production lead time (typically 4–6 weeks for monoblock, 4–8 weeks for two-piece)
4. Approve and pay deposit — production begins on deposit receipt
5. Dispatch and delivery — full tracking provided; international delivery typically adds 3–7 working days

Frequently Asked Questions

Is the ZF-6 Two Piece Forged available in any colour?
Yes — as a full billet forged product, the ZF-6 Two Piece Forged is finished to specification. Any painted, brushed, or polished finish can be specified. Contact [email protected] for details.

What PCDs does the ZF-6 Two Piece Forged support?
Standard PCDs are 5×112, 5×120, 5×114.3, 5×130. Additional bolt patterns are available to order — any PCD — built to order. Contact [email protected] with your vehicle's PCD to confirm.

How do I know what offset to choose?
Offset (ET) determines how far the wheel face sits from the hub mounting face. A correct ET ensures the tyre clears the suspension components and sits flush within the arch. The right ET depends on your vehicle's hub, brake caliper, and suspension geometry. Contact [email protected] with your vehicle details for a recommendation before ordering.

Is the ZF-6 available as a monoblock or two-piece?
Both variants are produced. The ZF-6 Two Piece features a separately constructed barrel, enabling deeper concave profiles and wider rim widths than the monoblock version. Both share the same face design. Order the Monoblock if you prioritise minimum wheel mass or want the single-piece construction for motorsport applications.

What colours are available on the ZF-6 Two Piece?
Any colour — the ZF-6 is finished to specification. Common choices include: Gloss Pearl White, Satin Carbon Grey, Brushed Titanium with clear, Polished face/Gloss Black barrel, Full Polished. Two-piece construction allows contrasting face and barrel finishes. Submit your spec to [email protected] for a quote.

Does Hodoor World offer a fitment advisory service?
Yes. If you are unsure about PCD, ET, width, or tyre sizing for your vehicle, contact us at [email protected] before ordering. We will confirm the correct specification for your platform.

Discover Hodoor World: Your Ultimate Car Customisation Destination

Hodoor World is an independent specialist in premium and custom forged wheels, sourcing directly from UK, European, and US manufacturers. Our catalogue spans flow-formed, fully forged, and multi-piece programmes — all with fitment advisory, direct dispatch, and global shipping. Browse the full selection at hodoor.world, read verified reviews on Trustpilot, or contact us at [email protected] for purchasing advice.

Wheel Care

Full billet forged wheels with a painted or polished finish require regular cleaning to maintain appearance and protect the surface. Rinse after each drive in wet or road-salt conditions. Use a pH-neutral wheel cleaner — acid-based products will attack anodised and polished finishes. Apply a ceramic wheel sealant every 3–4 months to protect the topcoat. For polished wheels, a dedicated metal polish applied monthly will prevent oxidation. Torque wheel nuts to your vehicle manufacturer's specification (typically 110–140 Nm for M14×1.5 fasteners on performance platforms) after fitment and again after 50 km.

ZF-6 Two Piece Forged — International Delivery

Hodoor World ships the ZF-6 Two Piece Forged worldwide. As a made-to-order product, production lead time is 4–8 weeks before dispatch. International shipping typically adds 3–7 working days. All orders ship with full tracking; customs declared at accurate value. Import duties and local taxes are the recipient's responsibility. For freight quotes to specific destinations, contact [email protected].