Quantum44 ZF-2 Two Piece Forged Wheels
Quantum44 ZF-2 Two Piece Forged Wheels — UK Full Forged
The Quantum44 ZF-2 Two Piece is a two-piece full billet forged wheel — a five-spoke split forged design that bridges the gap between a traditional multi-spoke and a twin-spoke aesthetic. The ZF-2 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-2 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-2 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 five-spoke split design — each spoke divides into two narrower branches as it approaches the rim, creating a Y-fork at the rim shoulder. The split occurs at approximately 60% of the spoke radius, generating a visually dense mid-section and an open hub.
- Finish: The ZF-2 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-2 Two Piece Forged — Design & Engineering Detail
The five-spoke split architecture of the ZF-2 distributes the load from each spoke root across two contact points at the rim flange, improving the rim's resistance to lateral impact. The branch angle and width are calibrated to maintain spoke stiffness-to-weight within 4% of the equivalent monoblock five-spoke — the split adds structural benefit without meaningfully increasing mass.
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-2 Two Piece Design Language
The ZF-2 deploys a five-spoke split geometry — a design move that increases visual complexity without sacrificing structural coherence. Each spoke originates as a single element at the hub and divides into two narrower branches at approximately 60 percent of its radial length, creating a Y-fork that arrives at the rim with two separate contact points. This split means the rim shoulder carries ten attachment points rather than five — the load path is distributed, the material cross-section at each branch can be reduced, and the resulting wheel is lighter than an equivalent solid five-spoke of the same diameter. Visually, the split introduces a layered quality: at one angle the spokes read as five primary elements, at another the branches dominate and the wheel appears to have ten thin spokes. The transition zone where the single spoke becomes two branches is precisely machined, not formed — the geometry is cut, not cast or flow-formed. This is visible as a crisp internal edge when the wheel is inspected at close range. On dark vehicles the split geometry creates strong contrast; on lighter colours the layering is more subtle but still apparent at moderate distance. In two-piece form, the ZF-2 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-2 Two Piece: Two-Piece Construction Advantages
The ZF-2 Two Piece brings the split five-spoke face into a two-piece assembly that unlocks offset and concave depth combinations the Monoblock version cannot achieve. The split-spoke face — with its ten rim-contact points — performs particularly well structurally in two-piece form: the branched spoke ends distribute force across a wider face-to-barrel interface, reducing stress at the joint perimeter. For builders targeting aggressive concave profiles on European platforms — typically 30–50mm of concave depth — the ZF-2 Two Piece is the specification to discuss with Quantum44. Wide-body builds on Audi B8/B9 platform vehicles running 10.5J or 11J fronts often specify the Two Piece to hit the required offset without the dimensional constraints of single-piece machining. The hardware package includes stainless bolts, washers, and a thread-locking compound; Quantum44 provides torque settings in the build sheet. Ongoing maintenance requires hardware inspection at the first major service after fitting and annually thereafter — a process that takes approximately 30 minutes per axle with standard workshop tooling.
ZF-2 Two Piece Target Platforms
The ZF-2 Two Piece expands the fitment envelope to include aggressive wide-body builds on platforms that standard monoblock sizing cannot reach. Audi B8/B9 RS5 with Liberty Walk or Rocket Bunny bodywork, BMW F90 M5 Competition on Clinched flares, and Mercedes W213 E63 AMG in custom arch specification are builds where the ZF-2 Two Piece's offset flexibility is essential. Contact Hodoor with your wheel arch clearance measurements and target stance — we will calculate the required offset and confirm achievability with Quantum44.
Vehicle Fitment Guide — Platforms the ZF-2 Two Piece Forged Was Designed For
The ZF-2 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-2 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-2 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-2 Two Piece Forged Compares
| Feature | ZF-2 Two Piece (this) | ZF-2 Monoblock | SFF-2 (Flow Forged) |
|---|---|---|---|
| Construction | Forged two-piece | Forged monoblock | Flow-formed monoblock |
| Concave depth | Deep — barrel independently specced | Moderate | Flat to shallow |
| Width range | Up to 14"+ | Up to 12" | 8"–12" standard |
| Colour | Fully bespoke | Fully bespoke | Catalogue: 3 finishes |
Explore the Quantum44 Lineup at Hodoor World
- Quantum44 ZF-1 Monoblock — full forged ZF-1 monoblock
- Quantum44 ZF-2 Monoblock — same design in one-piece monoblock — lighter, more rigid
- Quantum44 ZF-3 Monoblock — a seven-spoke forged monoblock with a clean, restrained profile suited to executive and GT platforms
- Quantum44 ZF-6 Monoblock — the deepest concave design in the ZF range — an eight-spoke show-grade forged wheel for builds where visual depth is the priority
- 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-2 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
- Contact Hodoor — email [email protected] with your vehicle make/model/year, required diameter, width, offset, and PCD
- Specify your finish — colour, texture, and hardware finish confirmed in writing before production begins
- 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)
- Approve and pay deposit — production begins on deposit receipt
- Dispatch and delivery — full tracking provided; international delivery typically adds 3–7 working days
Frequently Asked Questions
Is the ZF-2 Two Piece Forged available in any colour?
Yes — as a full billet forged product, the ZF-2 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-2 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-2 available as a monoblock or two-piece?
Both variants are produced. The ZF-2 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-2 Two Piece?
Any colour — the ZF-2 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-2 Two Piece Forged — International Delivery
Hodoor World ships the ZF-2 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].
