Quantum44 ZF-1 Two Piece Forged Wheels

Quantum44 ZF-1 Two Piece Forged Wheels — UK Full Forged

The Quantum44 ZF-1 Two Piece takes the Y-spoke design of the ZF-1 Monoblock and opens it into a two-piece construction, separating the forged face from the barrel to enable deeper concave profiles and rim widths that exceed the practical limits of single-piece machining. The face retains the full billet forged specification — 6061-T6 aluminium, multi-axis CNC-machined, yielding strength above 276 MPa. The barrel is joined via stainless steel aerospace-grade fasteners. Where the Monoblock is the choice for performance and everyday driving, the Two Piece is the choice when stance depth and width are the brief. Quantum44 manufactures both variants in England, building each set to the customer's specified diameter, width, offset, PCD, and finish.

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-1 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: full billet forged 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: the same three-pronged Y-spoke face as the ZF-1 Monoblock, combined with a separately constructed barrel that enables deeper concave profiles and wider rim widths than a single-piece machining envelope allows.
• Finish: Two-piece construction allows independent finishing of the forged face and the spun or flow-formed barrel section. Common approaches: polished face with painted barrel, brushed face with chrome barrel, or full painted in a single colour. Hardware finish specified separately.
• Hub-centric fit: Yes — bore machined to vehicle hub diameter
• Origin: Manufactured in England, United Kingdom

ZF-1 Two Piece Forged — Design & Engineering Detail

The ZF-1 Two Piece comprises a forged face section — identical design language to the ZF-1 Monoblock — joined to a separate barrel via aerospace-grade stainless steel hardware. The barrel is flow-formed or CNC-machined to the required width and step depth. This split construction is what enables true deep-concave profiles on wheels wider than 11": the face and barrel offset can be independently set during assembly, giving the builder full control over the final stepped appearance.

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-1 Two Piece Design Language

The ZF-1 is built around a three-pronged Y-spoke architecture — one of the most resolved geometric statements in the ZF range. Each spoke begins as a single shaft at the hub, tracing a straight radial path before terminating at the rim with a sharply chamfered edge that casts a defined shadow line under ambient light. The face geometry is deliberately restrained: no decorative milling, no false depth. The hub cap sits flush rather than recessed, and the spoke width is calibrated so that the three-spoke layout appears neither sparse nor overcrowded at standard viewing distance. What the ZF-1 communicates is engineering confidence — a design that has been reduced to its structurally necessary elements and no further. The chamfer angle is consistent across all three spokes, creating a visual continuity that reads clearly from 10 metres and holds interest at close range. In Gloss Black with polished face machining, the shadow play from the chamfers makes the spokes appear three-dimensional. In solid finishes the same geometry reads as graphic and architectural — two very different aesthetics from one design. In two-piece form, the ZF-1 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-1 Two Piece: Two-Piece Construction Advantages

The ZF-1 Two Piece separates the Y-spoke face from the barrel, enabling a deeper concave profile and wider rim widths than a single-piece machining envelope would permit. The face is machined from a 6061-T6 forged blank; the barrel is formed separately and machined to interface precisely with the face's rear flange. Assembly uses aerospace-grade stainless steel hardware torqued to specification. The joint line is visible at the inner barrel and on the outer rim lip — this is a design feature, not a finish defect. Two-piece construction enables Quantum44 to offer the ZF-1 face in a wider range of offsets than the Monoblock: the barrel can be manufactured at varying depths, and the face attached to achieve the specific ET required for flush or stepped fitment. This is particularly relevant for wide-body builds where exact flush fitment requires offset precision beyond what standard catalogue monoblock sizes offer. The barrel can also be refinished independently if it sustains kerb damage — the face remains undamaged and the build cost of a replacement barrel is lower than a full wheel replacement.

ZF-1 Two Piece Target Platforms

In two-piece form, the ZF-1 extends its fitment range to vehicles that require non-standard offsets or wider rim widths. Wide-body BMW M3/M4 builds on GTS or aftermarket flares, Audi RS3 8Y with widened arches, and Volkswagen Golf R with aggressive stance fitment are common ZF-1 Two Piece applications. The two-piece assembly also suits restomod and track builds where the face design needs to match an existing set while different axles require different offsets — the ZF-1 Two Piece can be built to exact ET for front and rear independently.

Vehicle Fitment Guide — Platforms the ZF-1 Two Piece Forged Was Designed For

The ZF-1 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, M6 — 5×120; deep concave works particularly well with aftermarket arches or factory wide-body M variants
• Audi RS: RS4, RS5, RS6, RS7 — 5×112; two-piece allows wider rear than monoblock without arch clearance compromise
• Porsche: 911 (991, 992), GT3, Turbo — 5×112 or 5×130; two-piece supports the wider-than-stock rim dimensions popular on Porsche stance builds
• Mercedes-Benz AMG: C63, E63, GT — 5×112; deep concave rear pairs with lowered suspension typical on AMG applications
• Lamborghini / Ferrari (custom): centre-lock and bolt-pattern variants built to specification — contact us for supercar applications

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-1 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-1 Two Piece Forged Compares

Explore the Quantum44 Lineup at Hodoor World

• Quantum44 ZF-1 Monoblock — same Y-spoke design in one-piece — lighter, more rigid construction
• Quantum44 ZF-2 Two Piece — two-piece with multi-spoke face — split-spoke architecture
• Quantum44 ZF-3 Two Piece — two-piece with tight multi-spoke face — mesh-influenced design
• Quantum44 ZF-4 Two Piece — two-piece with open flowing spoke geometry
• 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-1 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-1 Two Piece Forged available in any colour?
Yes — as a full billet forged product, the ZF-1 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-1 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.

How deep can the concave be on the ZF-1 Two Piece?
The concave depth depends on the barrel step specification and the tyre sidewall clearance on your vehicle. On wide-tyre applications (255/35 R20 or similar), a step of 25–40 mm is commonly achieved. On narrower tyres with higher sidewalls, deeper steps are possible. Quantum44 will advise on the maximum achievable depth for your specific fitment — provide your tyre size and target wheel width when enquiring.

Is the two-piece construction as strong as monoblock?
For road use, yes — the aerospace-grade stainless steel hardware used to join the ZF-1 Two Piece face to the barrel is rated well beyond the loads any road wheel experiences. Two-piece construction is used across the premium wheel industry on wheels that see track and motorsport use. The monoblock has a marginal advantage in pure structural stiffness (no joint), which matters in high-performance circuit driving; for road and occasional track use, the two-piece is fully appropriate.

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-1 Two Piece Forged — International Delivery

Hodoor World ships the ZF-1 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].