3SDM 3.20 FX3 Series — FX3 Extended Inner Barrel 3-Piece Forged Wheels — Big Brake Compatible
The 3SDM 3.20 FX3 Series brings the FX3 extended-inner-barrel construction to the 3.20 spoke design — delivering the same face geometry as the 3.20 FR while adding the brake clearance required for large performance calliper kits. The FX3 face-mount system extends the inner barrel further inward than a standard FR wheel, providing approximately 25–40mm of additional clearance behind the wheel face for Brembo, Alcon, AP Racing, or factory big-brake systems. The 3.20 spoke design is known for its balanced, multi-spoke aesthetic, and the FX3 construction opens this design to vehicles running upgraded callipers or high-performance factory brake packages that require space behind the face. Built entirely to order at the 3SDM facility in England.
Available Sizes
Every wheel in this series is built to order, available in the full diameter range from 18" through 24". Widths and offsets are fully custom per vehicle specification:
- 13" — compact and vintage applications; classic car fitments and custom narrow-body builds
- 14" — small sports and track vehicles; restoration projects and period-correct custom builds
- 15" — classic European sports cars; club racing and lightweight custom platforms
- 16" — entry-level sports cars, hot hatches, and track-day compact builds
- 17" — sports compacts and performance hatchbacks; custom project vehicles requiring smaller diameter profiles
- 18" — compact sports cars, hot hatches, and track-day applications requiring minimum unsprung weight
- 19" — sports saloons, coupés, and GT cars; the most popular diameter for road-focused performance builds
- 20" — SUVs, executive saloons, and performance coupés; suits standard and air-ride suspension platforms
- 21" — luxury GT cars, Porsche fitments, and bespoke builds requiring a larger wheel profile
- 22" — premium SUVs and large coupés; popular in staggered rear fitments for maximum stance
- 23" — custom show builds and modified platforms requiring a commanding presence
- 24" — maximum-diameter fitments for bespoke vehicles and high-ride-height custom projects
Width range: 7.0" to 14.0" in custom increments. All offsets (ET values) are specified per axle — front and rear can differ for staggered fitments. Centre bore and bolt circle diameter are machined to your vehicle's exact specification. A specification sheet is provided with every order.
Need a Different Size or Bolt Pattern?
As a fully bespoke 3-piece forged wheel, there are no fixed size constraints. If your vehicle requires a diameter, width, offset, or bolt pattern not covered by the standard range, our team will specify it for you. Start with the Hodoor World AI Wheel Design Service to receive an instant fitment recommendation tailored to your vehicle — then confirm the specification with our experts:
We will verify brake and suspension clearances, check offset and wheel arch compatibility, and recommend the optimal specification before production begins.
Technical Specifications
The 3.20 FX3 Series uses a face-mount 3-piece forged construction with an extended inner barrel system engineered specifically for vehicles running large brake calliper kits:
| Specification | Details |
| Construction | 3-piece forged aluminium — separate face, outer rim hoop, and extended inner barrel |
| Series Designation | FX3 (Face-Mount with Extended Inner Barrel) — additional clearance behind wheel face |
| Face Material | 6061-T6 forged aluminium alloy, CNC-machined after forging |
| Barrel | Spun aluminium outer rim hoop (face-mount) + extended inner rim hoop for maximum BBK clearance |
| Hardware | Stainless steel barrel bolts with anodised caps; anti-corrosion treated |
| Available Diameters | 13" | 14" | 15" | 16" | 17" | 18" | 19" | 20" | 21" | 22" | 23" | 24" |
| Available Widths | 7.0"–14.0" (custom increments available) |
| Centre Bore | Custom machined to vehicle specification |
| Bolt Patterns (PCD) | All standard and custom patterns — 4, 5, and 6-stud configurations |
| Offset Range | Custom ET specified per axle |
| Brake Clearance Advantage | ~25–40mm additional clearance vs. equivalent FR specification |
| Standards | JWL / VIA compliant; TÜV certification available on request |
| Origin | Designed and assembled in England |
| Warranty | 2-year structural warranty; finish warranty varies by coating type |
Finish & Colour Options
The 3-piece forged construction allows independent finishing of the face and barrel — enabling two-tone and contrast finishes that are impossible to achieve on monoblock wheels. Every finish is applied in-house at the 3SDM facility. Available options include:
- Gloss Black — deep powder coat; the most popular choice for aggressive and modified builds
- Brushed Aluminium / Brushed Silver — hand-brushed aluminium texture with UV-protective clear lacquer; a motorsport classic
- Polished — full mirror polish on face and/or barrel; premium show finish requiring periodic maintenance
- Gloss White — clean contrast finish; particularly effective on dark vehicles or for show builds
- Satin Black — flat matte black powder coat; stealth aesthetic, durable and low-maintenance
- Gunmetal / Dark Grey — satin or gloss metallic grey; understated performance look
- Bronze / Champagne Gold — warm metallic tone; popular in the modified and stance communities
- Candy Finishes — translucent candy apple red, candy blue, candy purple, and other candy hues via specialist powder
- Custom RAL / Vehicle Match — any RAL or BS colour, precisely matched to bodywork or interior accents on request
- Two-Tone Face & Barrel — contrasting face and barrel colours; only achievable on 3-piece forged wheels
- Brushed with Colour Tint — brushed aluminium base with a translucent colour overlay for a premium bespoke effect
Finish samples (physical swatches) and digital renders in your chosen finish are available on request before order confirmation. Contact [email protected] to arrange samples.
Vehicle Fitment Guide
This series suits a wide range of performance, luxury, and modified vehicles. As a bespoke forged wheel, it can be specified for any platform. Typical fitment examples:
- BMW 3 / 4 Series (F30/F32/G20/G22) — 18"–19", 8.5–9.5J, 5×120, ET30–ET40
- BMW M3 / M4 (F80/F82/G80/G82) — staggered 19"–20", 9J front / 10–10.5J rear, 5×120
- BMW M5 / M6 (F10/F13) — staggered 20"–21", 9.5J front / 10.5–11J rear
- BMW X5M / X6M (F85/F86/G05/G06) — 21"–22", 10–11J, 5×120
- Mercedes C-Class / E-Class AMG (W205/W213) — 19"–20", 5×112, ET35–ET45
- Mercedes GLE / GLS (W166/W167) — 21"–22", 9.5–11J, 5×112; low-ET options for air suspension builds
- Audi A4/A5/RS4/RS5 (B8/B9) — 18"–20", 8.5–9.5J, 5×112, staggered rear available
- Audi RS6/RS7 (C8) — 20"–22", 9.5–11J, 5×112
- Porsche 911 (991/992) — staggered 20"–21", 5×130, ET55 front / ET47 rear
- Porsche Cayenne / Panamera — 20"–22", 5×130, 10–11J
- Volkswagen Golf R / GTI (Mk7/Mk8) — 18"–19", 5×112, ET40–ET45
- Nissan GT-R (R35) — staggered 20", 5×114.3, 9.5J front / 10.5J rear
- Ferrari / Lamborghini / McLaren — bespoke fitments to factory spec with custom PCD and hardware
- Ford Mustang (S550/S650) — 19"–20", 5×114.3, deep-dish rear options for modified builds
Vehicle fitment examples are for guidance only. Exact specifications depend on suspension setup, tyre size, and any arch or body modifications. For a confirmed fitment check, contact [email protected] with your vehicle details and current tyre sizes.
Other Bolt Patterns Available
The centre disc of every 3-piece forged wheel is machined independently, meaning any bolt pattern can be specified without tooling changes. Available configurations include:
- 4-stud: 4×98, 4×100, 4×108, 4×114.3
- 5-stud: 5×100, 5×108, 5×110, 5×112, 5×114.3, 5×115, 5×120, 5×120.65, 5×127, 5×130
- 6-stud: 6×114.3, 6×127, 6×139.7
- Custom: Any bolt circle diameter on request — for competition, classic, or unique vehicle applications
Hub-centric rings are supplied where required to achieve a snug hub-centric fit. Note that PCD selection affects the position of bolt holes relative to the face design — confirm PCD compatibility with our team at [email protected] before finalising your order.
3SDM 3.20 FX3 vs. Other 3SDM Models
| Model | Series | Brake Clearance | Best Application |
| 3SDM 3.20 FX3 | FX3 (this wheel) | Extended — ~25–40mm additional | 3.20 design with big brake kits |
| 3SDM 3.20 FR | FR | Standard clearance | 3.20 design, standard brakes |
| 3SDM 3.08 FX3 | FX3 | Extended — same clearance | Big brake, 3.08 face design |
| 3SDM 3.04 FX3 | FX3 | Extended — same clearance | Big brake, 3.04 face design |
| 3SDM 3.06 FX3 | FX3 | Extended — same clearance | Big brake, 3.06 face design |
Choose the 3.20 FX3 when you want the 3.20 face design alongside big brake kit compatibility. For the same 3.20 aesthetic without a big brake requirement, the 3.20 FR is the appropriate choice. Contact [email protected] for construction guidance.
Explore the Full 3SDM Forged Lineup
Hodoor World is an authorised supplier of the complete 3SDM 3-piece forged range:
Can't Find the Right Wheel? Build Your Own
If no existing 3SDM model matches your design vision, Hodoor World offers access to a fully bespoke custom wheel manufacturing service. We can produce entirely original forged wheel designs — custom spoke patterns, unique finishes, proprietary structural specifications — engineered specifically for your vehicle or brand. Custom manufacturing is suitable for individual bespoke builds, tuning house programmes, motorsport team livery wheels, and automotive OEM projects.
How to Order Your 3SDM 3.20 FX3
- Enquire: Email [email protected] or call +44 7488 818747 with your vehicle make and model, current tyre size, and preferred diameter and finish. You can also start with the AI Wheel Design Service for an instant fitment recommendation.
- Fitment check: Our team verifies suspension clearances, brake compatibility, and arch fitment. We specify ET, width, and centre bore precisely and check for any known fitment challenges for your vehicle.
- Specification sheet & quote: You receive a formal quotation covering wheel specification, finish, production lead time, and delivery cost to your location.
- Deposit and production: A 50% deposit (or full payment on smaller orders) secures your production slot. Production typically takes 8–12 weeks at the 3SDM facility in England. Rush slots may be available — ask our team.
- Quality inspection: Each wheel is inspected, balanced, and certified before dispatch. Sets ship in reinforced protective packaging with torque documentation and fitting instructions.
We accept bank transfer and major payment methods. Enquire at [email protected] about payment plans for larger orders.
Frequently Asked Questions
- What does FX3 mean?
- FX3 designates a specific barrel construction within the 3SDM 3-piece forged range. The face is bolted to the outer rim (face-mount), and the inner barrel is extended further inward than on a standard FR wheel. This additional depth provides clearance behind the face for large brake callipers, rotors, and associated hardware.
- How much additional brake clearance does the 3.20 FX3 provide?
- The FX3 inner barrel extension provides approximately 25–40mm of additional clearance behind the wheel face compared to an equivalent FR specification. Exact clearance depends on the ET (offset) and width selected. Our team can calculate exact clearance figures for your brake kit if you provide the calliper and rotor dimensions.
- Is the FX3 heavier than the FR version?
- The FX3 barrel construction adds a small amount of weight due to the extended inner hoop. The difference is typically 0.3–0.7kg per wheel depending on diameter and width. For most road applications this is negligible; for race weight-sensitive builds, the FR series may be preferred if brake clearance is not required.
- What lead time should I expect?
- Standard production lead time is 8–12 weeks from confirmed order and deposit. Rush production may be available — contact [email protected] to check current availability.
- Can I order a staggered fitment?
- Yes — staggered front/rear setups are standard for 3-piece forged wheels. Each axle is specified independently. It is common to specify an FR barrel on the front axle and FX3 on the rear axle when only the rear brake kit requires extra clearance — ask our team for guidance.
- Can the wheel be refinished?
- Yes. The 3-piece construction allows the face to be separated from the barrel for independent refinishing at any time — significantly cheaper and faster than refinishing a monoblock wheel.
- Are all finishes available on the FX3 as on the FR?
- Yes — all finishes available on the FR series are equally available on the FX3 series. The barrel and face can be finished independently for two-tone or contrast effects.
Discover Hodoor World
Hodoor World is a specialist supplier of premium forged wheels, sourcing directly from 3SDM and other leading manufacturers to provide authentic factory-built wheels with expert fitment guidance and international delivery capabilities.
Wheel Care & Maintenance
Maintaining your 3SDM 3.20 FX3 3-piece forged wheels correctly will preserve both the structural integrity and the finish for years of use:
- Cleaning: Use pH-neutral, alloy-safe wheel cleaners. Avoid acid-based or abrasive products on polished, brushed, or bare aluminium surfaces. A soft brush and non-caustic shampoo is ideal for powder-coated faces.
- Barrel bolt torque: Check barrel bolt torque to the specified value (provided in the documentation supplied with your wheels) after the first 500 miles, and every 12 months or 10,000 miles thereafter. This is a simple check with a torque wrench.
- Refinishing: The 3-piece construction allows the face to be separated from the barrel for independent refinishing — a significant advantage over monoblock wheels. Professional refinishing is available without full wheel replacement.
- Polished surfaces: Maintain polished faces or barrels with a dedicated metal polish and UV-protective sealant applied regularly. Polish before oxidation sets in to prevent pitting.
- Storage: When stored off-vehicle, stack wheels horizontally with foam separators. Clean and apply a protective wax before storage to prevent corrosion from salt residue.
- Tyre pressures: Always maintain correct tyre pressures. Extended running on significantly under-inflated tyres can overload the rim bead seat and cause permanent deformation.
3SDM 3.20 FX3 — International Delivery
Hodoor World ships 3SDM wheels worldwide. All sets are professionally packaged with individual protective wrapping per wheel, reinforced cartons, and foam inserts to prevent transit damage.
- United Kingdom — standard and express tracked courier, typically 1–3 working days after production completion
- European Union — DDP (Delivered Duty Paid) options available; customers receive wheels without customs complications
- United States & Canada — door-to-door air and sea freight; air transit typically 5–10 working days
- Middle East — delivery to UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, and Oman; air freight available
- Asia Pacific — Japan, South Korea, Australia, Singapore, Hong Kong, New Zealand, and more
- Rest of World — we ship to most countries globally; contact us for a landing cost including duties
All international shipments include export documentation, insurance, and end-to-end tracking. For a full landed cost to your location, contact [email protected] with your delivery address.