Precision Forged & Heavy-Duty 20-Inch Alloy Solutions
Engineered by Shanghai Rimax Industry Co., Ltd. (Kipardo), our multi-piece forged and low-pressure cast wheels undergo 100% radial run-out verification, CNC structural balancing, and rigorous JWL/VIA load endurance tests.
Anatomy of an ODM 20 Inch 3 Piece Modular Rim
Unlike cast monoblock wheels, a three-piece modular architecture allows fine-grain mechanical decoupling of the outer rim lip, the inner barrel, and the forged central disc. This empowers tier-1 custom wheel builders to reach millimetric offsets and bespoke widths.
Outer Rim Lip (Spun 6061-T6)
Cold-spun from aerospace-grade aluminum blanks, outer lips are engineered with stepped or reverse profiles. Surface hardening delivers high resilience against curb impacts while accommodating multi-step diamond cutting, mirror high-luster polishing, or custom anodized finishes.
Center Disc (10,000-Ton Forged)
Forged under a 10,000-ton hydraulic press from isotropic 6061-T6 billets, the continuous grain structure guarantees maximum yield strength. Disc engineering is custom CNC-machined to clear massive 6-piston and 8-piston Big Brake Kits (BBK) without requiring structural hub spacers.
Inner Barrel & Perimeter Sealing
Formed using CNC rotary spin-forging, the inner barrel maximizes structural hoop stiffness while minimizing un-sprung rotational mass. Modular assembly incorporates medical/aviation-grade elastomeric perimeter seals and titanium or Grade 12.9 high-tensile fasteners.
Industry Trends & Enterprise Procurement Drivers
The global aftermarket is experiencing an unprecedented surge in demand for 20-inch 3-piece modular configurations. Driven by high-performance EV platforms, luxury restomod engineering, and widebody stance dynamics, procurement strategies are shifting toward flexible ODM manufacturing.
High-Torque EV Dynamics
Heavy battery packs and instant torque demand wheel load ratings exceeding 950 kg to 1100 kg. 20-inch modular wheels provide the sweet spot for aerodynamic profiling, large rolling diameters, and reinforced bead seats to prevent high-torque tire slippage.
SKU Fragmentation Control
Instead of tooling dedicated monoblock molds for every PCD, ET, and width, enterprise buyers use standardized inner/outer rim halves. By machining central discs on-demand, distributors drastically reduce inventory holding capital while delivering infinite fitment flexibility.
Restomod & Bespoke Tuning
Classic performance chassis (e.g., Porsche 911, Nissan Skyline GT-R, muscle cars) undergo wide-track conversions requiring deep-dish stepped lips up to 5 or 6 inches. 3-piece modular engineering provides extreme negative offsets impossible to achieve via traditional casting.
Rapid Field Servicing
For fleet motorsport programs and high-end consumers, curbside wheel damage does not require discarding the entire wheel. Damaged outer lips or inner barrels can be individually replaced and resealed, protecting client investment and brand reputation.
Macro Solutions: From 3D FEA Model to Dynamic Assembly
Shanghai Rimax Industry Co., Ltd. operates an integrated ODM manufacturing ecosystem. Our engineering workflow bridges digital topology optimization with multi-axis CNC machining, hermetic sealing chemistry, and calibrated multi-spindle bolt torquing.
Topology & FEA Stress Mapping
Finite Element Analysis (FEA) simulates radial loads up to 2.5x gross vehicle axle weight, validating spoke transition radii and eliminating destructive stress concentrations before metal is cut.
10,000-Ton Isothermal Forging
High-purity 6061 billet material is heated and pressed to compact the alloy's crystalline structure, aligning microscopic grain flows along the mechanical load lines for ultimate toughness.
T6 Solution & Quench Hardening
Parts undergo 535°C solution heat treatment followed by high-speed agitation water quenching within 10 seconds, then artificial aging at 175°C to achieve full T6 structural temper.
Multi-Axis High-Speed CNC
Precision multi-axis CNC milling centers cut the center disc bolt patterns, lug bores, weight-saving back-pocket pockets, and outer perimeter register seats with 0.01mm positional accuracy.
Automated Surface Pretreatment
Multi-stage ultrasonic degreasing, eco-friendly zirconium nano-passivation, and electro-deposition powder primer coat ensure over 1,000 hours of continuous salt-spray corrosion resistance.
Multi-Piece Modular Caulking
Outer lip and inner barrel mating registers receive robotic bead application of aviation polysulfide or polyurethane elastomeric sealants, maintaining flexibility under -40°C to 120°C extremes.
Computer-Torqued Fasteners
Grade 12.9 or Grade 5 Titanium fasteners are installed using calibrated multi-spindle digital torque-angle equipment, preventing uneven clamping forces and flange deformation.
Helium Mass Spectrometer Testing
Completed 3-piece assemblies undergo pressurized helium chamber leak checks, confirming zero porosity or seam leakage prior to final optical runout inspection and protective crating.
Wheel Architecture Engineering Matrix
Evaluate performance characteristics across traditional low-pressure casting, flow-forming, 1-piece monoblock forging, and modular 3-piece forged wheels to strategically plan your catalog's price-to-performance tiers.
| Evaluation Parameter | Low-Pressure Cast | Flow-Formed (Rotary) | 1-Piece Monoblock Forged | ODM 20" 3-Piece Forged |
|---|---|---|---|---|
| Alloy Material Grade | A356.2 Aluminum Alloy | A356.2 Modified / A356-T6 | Aerospace 6061-T6 Billet | 6061-T6 Spun Rim + Forged Disc |
| Tensile Strength (UTS) | 220–250 MPa | 260–290 MPa | 310–340 MPa | 315–350 MPa |
| Typical 20x10 Weight | 14.5 – 16.5 kg | 12.2 – 13.8 kg | 10.0 – 11.2 kg | 10.8 – 11.9 kg (Optimized) |
| Offset & Width Flexibility | Fixed tooling mold | Fixed center, variable barrel | CNC programmable (single block) | Infinite (Modular rim halves) |
| Outer Lip Configuration | Monolithic cast lip | Rolled barrel edge | Integral machined profile | Step Lip / Reverse Lip / Rolled |
| Post-Impact Repairability | Non-repairable (Structural risk) | Barrel straightening only | Limited cosmetic refinishing | Modular part-by-part replacement |
| Tooling Lead Time | 45–60 days (Steel mold) | 35–50 days (Die + Mandrel) | 5–10 days (CNC Program) | 7–12 days (Rapid disc machining) |
Global Compliance & Rigorous Homologation
To guarantee friction-free importation and consumer safety, Shanghai Rimax Industry Co., Ltd. validates all wheel structures against North American SAE J2530, Japanese JWL/VIA, and European TÜV standards.
Dynamic Cornering Fatigue
Simulating extreme lateral G-forces during high-speed cornering, assemblies endure over 100,000 cycles at bending moments exceeding standard road thresholds without micro-fracturing or perimeter bolt tension loss.
Dynamic Radial Fatigue
Wheels are loaded against a rotating drum at speeds up to 100 km/h, simulating continuous rolling contact over 500,000 to 1,000,000 revolutions under 2.25x load factor to confirm long-term hoop durability.
13° & 30° Dynamic Impact
A calibrated drop hammer strikes the wheel rim flange at 13° and 30° angles. This verifies structural ductile yield without brittle catastrophic fracturing, sudden tire deflation, or hub pad detachment.
Standard Kipardo Commercial Guarantee
Every modular wheel engineered by Rimax is backed by our benchmark 5-Year / 100,000 KM Structural Warranty and a comprehensive 2-Year Warranty on all powder coating, anodized, and diamond-cut finishes.
Technology Roadmap: 2025–2030 Innovations
As automotive electrification accelerates and unsprung mass optimization becomes paramount, Rimax's R&D engineering center is advancing next-generation modular wheel technologies.
Carbon-Composite Hybrid Barrels
Merging dry carbon-fiber outer rim halves with 6061-T6 forged center discs reduces rotational inertia by up to 35% compared to all-metal designs, drastically improving EV acceleration efficiency and steering response.
AI Generative Topology Optimization
Utilizing neural network algorithms to calculate internal spoke hollows and stress trajectories. This allows us to mill organic, lattice-reinforced back-pads that shave unnecessary grams while increasing spoke bending resistance.
Acoustic Resonator Integration
To counteract EV interior cabin drone caused by road vibration entering large 20-inch wheels, our advanced barrels integrate Helmholtz resonator channels to dampen tire cavity noise by up to 5 dB(A).
Frequently Asked Questions for Wheel Importers
Critical engineering, production lead-time, and logistics answers for wholesale buyers, brand distributors, and custom motorsport procurement managers.
What is the core structural advantage of a 3-piece modular forged wheel over a monoblock wheel?
How does Shanghai Rimax prevent air leakage at the multi-piece rim seam?
What are the Minimum Order Quantities (MOQ) and production turnaround times for custom ODM forged wheels?
Can Kipardo engineer custom 3-piece wheels to clear specific aftermarket Big Brake Kits (BBK)?
What certifications and export documentation does Rimax provide for international customs and homologation?
What fastener hardware options are available for 3-piece assemblies?
Specialty 4x4 Off-Road & Concave Forged Product Range
Expand your market coverage across heavy-duty 4WD truck fitments, concave monoblock series, and multi-piece modular collections with factory-direct wholesale pricing from Rimax.
