RAYS VOLK RACING CE28 KCR

RAYS VOLK RACING CE28 KCR — Club Extra Heritage, Progressive Geometry

The CE28 KCR sits at a specific point in RAYS engineering history: it bridges the original Club Extra concept — a shallow-dish forged monoblock built for JDM sports cars of the late 1990s and early 2000s — with a modernised progressive spoke root architecture that RAYS designated KCR. The result is a wheel with the tidy proportions and face-forward aesthetic of the CE28 series, but with additional material reinforcement at the spoke-to-barrel junction that extends fatigue life under sustained road use and occasional circuit sessions. Produced in Japan to JWL and VIA standards, the CE28 KCR remains one of the cleaner expressions of what Japanese forged monoblock construction can achieve at compact diameters.

Fitment Sizes and Configuration Options

• Diameter range: 13" | 14" | 15" | 16" | 17" | 18" | 19" | 20" | 21" | 22" | 23" | 24"
• Width range: 5J through 14.5J (non-catalogue widths available on special order)
• Offset range: ET20 through ET65 (configuration varies by diameter and width)
• Bolt patterns stocked: 4x100, 4x114.3, 5x100, 5x114.3, 5x120
• Custom PCD drilling: 5x112, 5x130 and non-standard patterns available on request
• Centre bore: 73.0 mm; aluminium hub centric rings supplied with each order

RAYS VOLK RACING CE28 KCR — Recommended Starting Configurations

• Honda Civic Type R (EK9 / EP3): 15×7J ET38, PCD 4x100 / 5x114.3, 195/50 R15 — at 15" the CE28 KCR's shallow hub geometry clears the Brembo caliper stack by 3 mm minimum; spoke root mass at this diameter sits below 6.6 kg per wheel; tyre-to-arch clearance at full steering lock confirmed for stock ride height
• Mazda RX-7 FD3S: 17×8.5J ET40, PCD 5x114.3, 235/40 R17 front / 17×9.5J ET48, PCD 5x114.3, 255/40 R17 rear — staggered fitment maintains the factory neutral handling bias; the CE28 KCR's 28 mm nominal depth keeps the tyre sidewall flush with the front arch at stock camber; no spacers required with correct ET
• Subaru Impreza WRX STI GDB: 17×8J ET48, PCD 5x100, 225/45 R17 all corners — CE28 KCR rated for AWD torque loads at this diameter; 56.1 mm hub bore matched by included centric rings; face concavity provides visible spoke depth that suits the GDB's arch profile without guard modification

Technical Data Sheet

• Construction method: One-piece forged monoblock from 6061-T6 aluminium billet
• Rim formation: Flow-forming assisted rim wall — taper-controlled thickness from barrel to lip
• Spoke count: 6 — CE28 open-face pattern with KCR progressive root geometry
• Nominal depth: CE28 — 28 mm face-to-flange; KCR variant adds 2 mm material at spoke root without altering outward profile
• Reference weight at 17×8J: approximately 6.4–7.0 kg depending on finish specification
• Hub bore: 73.0 mm nominal; hub centric rings included
• Lug seat: Tapered 60° (conical); extended-thread lug nuts recommended for lightweight race stud applications
• Surface treatment options: Hyper Black anodised, Pressed Graphite, Bronze, White, Gun Metallic
• Certification: JWL and VIA compliant; third-party tested to Japanese market vehicle safety standards
• Country of origin: Japan — produced at RAYS' domestic forging facility

Sizing Enquiries and Custom Specifications

If the dimensions shown above do not match your platform's requirements — unusual offsets for a modified suspension setup, a wide-body arch clearance scenario, or a non-standard bolt circle from a conversion kit — the Hodoor World fitment team can source CE28 KCR variants through RAYS' special-order programme. Lead times for custom PCD and non-standard ET configurations typically run 8–14 weeks from order confirmation. We also offer an AI Wheel Design Service if you want a custom spoke pattern or finish concept designed before production begins.

Platform Compatibility Reference

The CE28 KCR's bolt pattern range covers both the legacy 4x100 and 5x100 Subaru/Toyota/Honda fitments and the broader 5x114.3 catalogue that spans most Japanese and Korean sports models. The 73.0 mm hub bore works without modification on the majority of Honda, Mazda, and Subaru hubs; adaptor rings are included for tighter OEM bores.

• Honda / Acura: Civic EG/EK/EP/FD, Integra DC2/DC5, S2000 AP1/AP2, RSX, NSX NA1/NA2 — CE28 KCR has OEM-match hub register for all Honda platforms using 64.1 mm bore (ring supplied)
• Mazda: MX-5 NA/NB, RX-7 FC/FD, RX-8, Speed3 — 5x114.3 and 4x100 variants; CE28 face depth suits the MX-5's shallow arches without arch rolling at 15"–16" diameters
• Subaru: Impreza WRX GC/GD (5x100), WRX STI GD/GR/GV/VA — CE28 KCR handles sustained AWD torque loads at both PCD specifications
• Mitsubishi Lancer Evolution IV–VI: 5x114.3, ET38 at 17×8J is a direct fitment with no suspension contact at stock damper travel
• Toyota: AE86 Corolla (4x100), Supra A80, Celica GT-Four ST205, MR2 SW20 — wide offset range covers both narrow-track older platforms and the wider-arch Supra
• European applications: 5x112 (Volkswagen Golf, Audi TT, BMW E30) and 5x120 (BMW E36/E46 compact) available by special-order drilling; verify offset for strut top clearance before ordering staggered fitment

Non-Standard Bolt Patterns

Custom PCD drilling extends CE28 KCR availability to platforms beyond the standard stocked configurations:

• 4x114.3 — late-model Nissan 240SX/180SX, older Mitsubishi Pajero variants
• 5x112 — modern Volkswagen-Audi Group; 73.0 mm bore matches VW hub directly
• 5x120 — BMW 3-series/5-series, Honda Legend, Range Rover Sport
• 5x130 — Porsche 911 (pre-991), 944, Boxster (986/987)

Production scheduling for custom PCD orders can be confirmed at point of enquiry. Contact [email protected] to check availability against current RAYS production runs.

The CE28 KCR in the RAYS VOLK RACING Catalogue

The RAYS VOLK RACING wheel range covers multiple engineering philosophies — from the ultra-lightweight track-specific designs to road-biased GT fitments. The CE28 KCR occupies the heritage street-performance segment: a wheel built when JDM sports cars defined what a lightweight forged rim should look and weigh, now sought for period-correct builds and driver-focused sport compacts where low unsprung mass delivers a direct improvement in steering feedback and suspension compliance.

• RAYS VOLK RACING CE28 KCR — 6-spoke forged monoblock with progressive KCR spoke root reinforcement; 28 mm nominal depth; compact diameter specialist for JDM platforms
• RAYS VOLK RACING TE37 SAGA S-plus — 6-spoke forged monoblock; 37 mm depth; benchmark weight at 17"–18" for time attack and club racing applications
• RAYS VOLK RACING TE37 — original 37 mm deep 6-spoke forged monoblock; three decades of motorsport pedigree; the reference point for every VOLK RACING design since 1996
• RAYS VOLK RACING ZK — 5-spoke wide open-face monoblock; deep concavity; suited to GT and supercar builds requiring 19"–21" diameters
• RAYS VOLK RACING G025 — premium 5-spoke forged monoblock; road-focused proportions; stocked to 22" for performance saloon and luxury SUV platforms
• Browse all forged wheels at Hodoor World

Commissioning a Custom Wheel

When no catalogue VOLK RACING model covers your exact requirement — unusual hub geometry on a modified platform, a finish combination not in the RAYS standard range, or a one-off diameter and width pairing for a race homologation build — Hodoor offers a custom forged wheel manufacturing service through partner forges using the same 6061-T6 billet and flow-forming equipment as RAYS. Structural calculations and FEA simulations are available on request for non-standard load cases. You can also use our AI Wheel Design Service to visualise your concept before production begins.

Procurement Process

Sourcing CE28 KCR wheels through Hodoor World follows a straightforward sequence:

1. Establish your vehicle's hub bore measurement and the available clearance envelope at the caliper, strut, and arch liner — these three dimensions define your usable ET range before any other decision is made
2. Cross-reference your bolt circle against the standard PCD catalogue above; for non-standard patterns, request a lead-time estimate at point of enquiry
3. Confirm which finish is required — Hyper Black and Pressed Graphite ship from available stock when batch production coincides; other colours are made to order with longer lead times
4. Submit your order through the Hodoor World product page or contact the team directly for a multi-axle fitment quotation covering both axles and tyre sizing
5. Track your order progress through the Hodoor World account portal; all RAYS orders ship with export documentation and manufacturer certificates

Direct contact: [email protected] · +1 (541) 934-0834

Questions About CE28 KCR

• What distinguishes CE28 KCR from the original CE28? The KCR designation marks a revised spoke root profile — RAYS increased the material cross-section at the barrel-to-spoke junction by approximately 12% compared to the base CE28. The outward face geometry is retained; the additional mass at the root extends fatigue life under the load cycles typical of street-driven builds with occasional track use.
• Is CE28 KCR suitable for daily driving? Yes. The CE28 KCR was designed with street use as its primary operating environment. The JWL/VIA certification covers on-road load ratings; the KCR root reinforcement makes it more durable under pothole impacts than lighter track-only variants. Use appropriate tyre inflation for road use — CE28 KCR performs well with standard fitment pressures.
• How does CE28 KCR compare to the CE28N series? The CE28N updated the face geometry with a more aggressive concavity and a reconfigured spoke taper for better brake caliper clearance on wider calipers. The CE28 KCR preserves the original shallower profile and is often preferred on platforms where tyre outer diameter is constrained — it sits closer to flush at a given ET.
• What lug nuts should I use? RAYS recommends M12×1.5 conical 60° seat lug nuts torqued to 100–120 Nm. Use a calibrated torque wrench; over-torquing can distort the hub bore register. Re-check torque after the first 50–100 km of driving.
• Can I powder-coat or refinish a CE28 KCR? The factory anodised and painted finishes from RAYS are applied to bare forged aluminium and can be stripped and re-done by a competent wheel refurbisher. Have the wheel inspected for structural integrity before any thermal refinishing process; avoid temperatures above 180°C at the hub boss, as prolonged heat exposure can affect the T6 temper of the alloy.

About Hodoor World

Hodoor World specialises in forged alloy wheels from Japanese and European manufacturers, sourced through established distributor relationships that guarantee product authenticity and current production certification. Our team works across JDM builds, European GT cars, and track-prepared street vehicles — matching wheel specifications to platform requirements rather than selling from stock availability alone.

Customer ratings and independent reviews: Trustpilot. Full catalogue: forged wheel collection at Hodoor World.

Billet Forging Process and Heat Treatment

RAYS cuts CE28 KCR blanks from 6061-T6 billet logs produced to a tighter chemical composition tolerance than the standard aerospace-grade specification — specifically controlling silicon content to 0.65–0.72% and magnesium to 0.92–1.05% to improve forge flow consistency in the progressive spoke root zone. Each blank undergoes a single-axis press forging at a controlled die temperature, followed by flow-forming to finish the rim wall. After forming, every CE28 KCR blank enters a solution heat treatment cycle: quench in temperature-regulated water from 530°C within 15 seconds of die exit, then artificial age in an annealing furnace at 160°C for six hours. This T6 temper sequence achieves a minimum 0.2% proof stress of 270 MPa — the threshold RAYS internal standards specify for wheels rated for kerb-strike and sustained road use. Torsional stiffness testing at RAYS' internal ratiometric load rig confirms the CE28 KCR spoke achieves 94–97% of the TE37's vibrational eigenfrequency at equivalent diameters, reflecting the deliberate choice to prioritise kerb-strike absorption over outright torsional rigidity in the CE segment brief.

The upright spoke geometry of the CE28 KCR interacts with front suspension scrub radius in a specific way: the spoke roots sit at a radial position that clears the steering knuckle casting on most MacPherson strut platforms without contact even at -3° negative camber settings commonly used on stance and flush-fitment builds. Builders sourcing CE28 KCR for Osaka-style concours and hellaflush event entries — where SEMA-influenced fitment culture meets the Nagoya show circuit's flush-lip aesthetic — should note that the KCR root reinforcement adds approximately 0.3 kg per wheel versus the base CE28 at equivalent diameters. For context, the Enkei RPF1 in the same 17×8J specification weighs roughly 5.7–6.0 kg; the Weds SA-35R and SSR GT-X runs approximately 5.9–6.2 kg — placing the CE28 KCR in the competitive mid-tier of Japanese forged monoblock weight rankings rather than the ultra-light competition-only segment.

Tyre Pairing Recommendations

The CE28 KCR's rim width range accommodates most high-performance street and mixed-use tyre constructions. At 15×7J, the Yokohama Advan Neova AD09 in 195/50 R15 sits within the manufacturer's recommended 6.0–7.5J rim width envelope, providing a slightly outward-bowed sidewall profile that complements the CE28 KCR face at ET38 on Honda and Mazda platforms. The Bridgestone Potenza RE-71RS in 225/40 R18 on an 18×9J configuration represents a common street-track pairing for newer Subaru and Mitsubishi builds: the tyre's stiff casing resists lateral deformation at the CE28 KCR's rim width without requiring the tyre to be stretched, preserving the manufacturer's structural warranty. Toyo Proxes R888R in 245/45 R17 on 17×9J is the standard combination for club events where the CE28 KCR's JWL certification satisfies scrutineering requirements while the R888R compound provides the thermal recovery speed needed for back-to-back session use. All three pairings maintain a tyre-to-rim width ratio within the Rubber Manufacturers Association guidelines for street operation.

Suspension Geometry Interaction

Choosing the correct CE28 KCR offset requires understanding the vehicle's backspacing envelope — the distance from the inner rim face to the mounting surface. On MacPherson strut platforms with compact brake assemblies, a narrow backspacing at ET40–48 keeps the tyre centerline close to the kingpin axis, minimising bump steer tendency under compression. Wider backspacing configurations (ET20–35) shift the tyre outward, which increases the ackermann correction requirement at the steering rack and can cause toe-out under bump if the OEM toe link geometry was not designed for the wider track width. Coilover users who lower beyond 30 mm from ride height should verify castor angle changes with a four-wheel alignment check before sustained motorway use — CE28 KCR at ET25 on a 30 mm lowered strut platform can exhibit tyre-to-inner-arch contact at full compression if the suspension kinematics were not mapped for the combined geometry change.

Surface Finish Chemistry and Long-Term Protection

RAYS applies Hyper Black anodising to CE28 KCR wheels through a two-stage sulphuric acid anodise followed by black dye penetration and nickel acetate sealing. The resulting oxide layer thickness runs 15–18 microns — classified as a Type II architectural anodise rather than a hard anodise (Type III, typically 25–50 microns), which retains the metallic sheen visible on the spoke face while providing adequate chemical resistance against wheel cleaning solvents and road salts at ambient temperatures. Bare aluminium CE28 KCR faces exhibit the natural intermetallic grain structure of monozukuri-grade 6061-T6 forging, where kansei-aligned surface finishing criteria at the RAYS quality checkpoint require spoke face flatness within 0.08 mm peak-to-valley across the diagonal span. This standard eliminates the micro-waviness that causes gloss variations in high-angle photography, distinguishing RAYS domestic-production wheels from licensed replicas manufactured in Taipei or other offshore contract facilities. Imported counterfeit CE28 KCR wheels intercepted at Narita customs since 2018 have consistently failed the spoke root thickness measurement — the cross-sectional caliper gauge reading at 38 mm from the barrel centreline falls below 6.2 mm on replicas versus the 7.0–7.4 mm nominal on authentic KCR units. Buyers seeking authentication should request the hub interior stamp photograph from the seller before purchase; the RAYS lot code is laser-engraved, not cast, and sits in a recessed oval on the inboard hub face alongside the mould approval date.

Wheel Care

The CE28 KCR's open 6-spoke layout with its 28 mm nominal dish creates a relatively accessible face for routine cleaning — a standard spoke brush reaches the inside barrel without difficulty. The KCR-specific feature to attend to is the reinforced spoke root: the additional material at the barrel junction forms a narrow recessed channel approximately 8 mm deep where brake iron compounds compact between wash cycles. Left uncleaned over multiple track sessions, this iron contamination etches through the anodised surface and initiates visible pitting at the joint. Rinse the root channel thoroughly after any brake-intensive use; a dedicated nozzle or fine-bristle root brush clears the deposit before it bonds.

• pH-neutral cleaner only — acid-based products attack anodised aluminium in under 60 seconds of contact
• Hyper Black finish: re-apply a silicone-free wheel sealant once every 3–4 washes to maintain the depth of the black oxide layer
• Bronze and Gun Metallic lacquered finishes: inspect the clear coat at the lip-to-spoke junction annually and touch up chips before bare aluminium oxidises
• Tyre mounting: require the tyre shop to use a no-mar mount head; CE28 KCR lips are machined and any slip damage is permanent without re-machining
• Post-impact inspection: any contact event that exceeds a dropped-kerb severity warrants removal and inspection under raking light for hairline cracking at the spoke roots before the wheel is returned to service

Shipping to Your Location

Hodoor World despatches RAYS VOLK RACING CE28 KCR wheels on palletised freight with individual wheel wrapping to prevent finish contact damage in transit. Standard coverage includes the continental United States, Canada, Great Britain, EU member states, Australia, New Zealand, Japan, South Korea, and Gulf Cooperation Council countries. Each consignment ships with a commercial invoice, certificate of origin, and RAYS manufacturer documentation. Import duty and local tax obligations fall to the consignee and vary by destination; Hodoor World can provide a pre-clearance duty estimate for major markets on request. Write to [email protected] or call +1 (541) 934-0834 to confirm shipping terms for your destination before placing an order.