PUR RS42 (Rs Series)

PUR RS42 — Asymmetric Stepped-Face Forged Monoblock

The PUR RS42 introduces a bold design vocabulary to the RS Series through its asymmetric stepped-face spoke architecture — a construction where the spoke face plane shifts inward at a defined point, creating a dramatic three-dimensional profile that reads as mechanically complex from any angle. Forged from a single billet of 6061-T6 aerospace aluminum at PUR's California manufacturing facility, the RS42 combines the mass and strength advantages of the forged monoblock route with a visual language that distinguishes it from every other wheel in the RS lineup. It is equally at home on a show car that never sees a wet road and a daily-driven performance vehicle that covers ten thousand miles per year.

Available Sizes and Specifications

The RS42's stepped-face geometry is offered across a size matrix that covers the full spectrum from standard sport fitments to aggressive widebody configurations.

• Diameters: 18", 19", 20", 21", 22", 23"
• Widths: 8.5J to 13J (0.5J increments)
• Offsets: ET10 to ET55 (custom offsets available on request)
• PCD: 5×112, 5×114.3, 5×120, 5×130, dual-drill available
• Center bore: 72.6 mm; hub-centric rings supplied for other hub diameters
• Hardware: extended-thread titanium hardware optionally supplied

Need a Different Size?

PUR builds every RS42 to order, which means non-catalogue specifications — including unusual width and offset combinations for track builds or extreme widebody applications — are fully achievable. We also offer an AI Wheel Design Service if you want a custom spoke pattern or finish concept designed before production begins.

Technical Specifications

Stepped-Face Construction and Design

The RS42's defining feature is the abrupt step in the spoke face plane. Unlike wheels that achieve a concave appearance through a gradual inward sweep from rim to hub, the RS42 uses a deliberate geometric discontinuity — a step of defined height — to create a multi-plane face. The outer portion of each spoke face is set proud of the inner portion, creating a shadow line that visually separates the two planes and gives the wheel a structural, almost machined-from-solid appearance. This geometry is only achievable by multi-axis CNC machining from a forged blank; no casting or flow-forming process can produce the sharp internal corners required. PUR's engineers modeled the step transition through FEA to confirm that stress concentrations at the corner do not reduce fatigue life relative to a conventional spoke profile.

Asymmetric Spoke Layout

In addition to the stepped face, the RS42 features a subtly asymmetric spoke arrangement. While the wheel uses five primary spokes — as with most RS Series designs — the angular spacing between adjacent spokes is not uniform. Instead, PUR's design team varied the inter-spoke angles by up to 5 degrees to create a dynamic visual rotation effect. This means the wheel appears to be in motion even when stationary, and the absence of rotational symmetry makes the wheel identifiable at a glance without needing to read the centercap logo.

Finish Options

The RS42 is available across PUR's full finish portfolio, with the stepped face lending itself particularly well to two-tone treatments:

• Gloss Black / Brushed Step — glossy outer plane, brushed inner plane for maximum contrast
• Satin Silver / Polished Step — satin spoke body, mirror-polished step face
• Matte Gunmetal — full dark powder coat for aggressive stealth aesthetic
• Candy Bronze / Milled Face — amber-tinted powder with CNC-milled brightness cut
• Gloss White / Machined Barrel — white spoke, natural machined barrel
• Custom Two-Tone — specify any RAL/Pantone combination for outer and inner spoke planes

Vehicle Fitment Guide

The RS42's show-stopping visual design makes it particularly popular on builds intended for automotive shows, social media content, and flagship personal vehicles.

• BMW M5 Competition (F90) — 20×9.5 ET33 front, 20×10.5 ET23 rear, 5×120
• Mercedes-AMG E63 S (W213) — 20×9 ET32 front, 20×10 ET20 rear, 5×112
• Audi S8 (D5) — 21×9.5 ET22 front, 21×10.5 ET18 rear, 5×112
• Porsche Panamera Turbo S (971) — 21×9.5 ET64 front, 21×11.5 ET62 rear, 5×130
• Range Rover Sport SVR (L494) — 22×9.5 ET38 front, 22×10 ET35 rear, 5×120
• Cadillac CT5-V Blackwing — 20×9.5 ET32 front, 20×10.5 ET25 rear, 5×120
• Rolls-Royce Wraith Widebody — 22×10 ET20 front, 22×12 ET15 rear, 5×112

Other Bolt Patterns Available

Beyond the two primary bolt circle standards, the RS42 is available for:

• 5×120 — BMW 5-series, X5, X6; Land Rover; GM high-performance
• 5×130 — Porsche complete range including Cayenne and Panamera
• 5×108 — Ford GT, Jaguar F-Type, Aston Martin Vantage
• 5×112 / 5×114.3 dual-drilled — a popular combination for VAG/Japanese crossover builds
• Custom bolt patterns for bespoke or race-prepared vehicles on request

Comparison: PUR RS Series Models

PUR RS Series Lineup

• PUR RS01 — Five-spoke forged monoblock
• PUR RS02 — Twin-five mesh forged monoblock
• PUR RS29 — Split Y-blade forged monoblock
• PUR RS29.EVO — Evolved aerodynamic blade forged monoblock
• PUR RS36 — Six-spoke turbine forged monoblock
• PUR RS42 — Asymmetric stepped-face forged monoblock
• Browse all forged wheels at Hodoor World

PUR Wheels — American Forged Heritage

PUR (Precision UltraLightweight Racing) was an American premium wheel manufacturer that operated from the early 2000s through the mid-2010s, earning a strong reputation for aerospace-grade 6061-T6 forging and motorsport-driven design. Based in the United States, PUR produced mono-piece and multi-piece forged wheels spanning their RS, LX Luxury, LG Legacy, and Limited Edition series — each engineered to specific performance or aesthetic mandates. The RS42 (RS) exemplifies PUR's approach to forged monoblock construction: precision-machined from a single billet or assembled from matched forged components, then finished to individual customer specification. While PUR no longer produces new models, their wheels retain strong collector value and fitment relevance across both performance and luxury platforms. Visit the PUR Wheels YouTube channel for available archival brand footage.

Custom Forged Program

The RS42's stepped-face concept is a natural starting point for completely custom designs. Hodoor offers a custom forged wheel manufacturing service. You can also use our AI Wheel Design Service to visualise your concept before production begins. Previous custom RS42-inspired builds have explored double-step profiles, counter-rotating asymmetry, and multi-tone anodized finishing across the step planes.

How to Order

To order the PUR RS42, submit an inquiry through Hodoor World with your vehicle specifications, desired size, offset, finish, and any custom requirements. Our team will confirm fitment compatibility, review clearance for the stepped face depth, and provide a firm quote. A deposit secures your production slot and the balance is due prior to shipping. Complete documentation — commercial invoice, packing list, certificate of origin — is provided for international orders.

Frequently Asked Questions

Is the stepped-face design structural or purely cosmetic? The step is structural — it is machined into the billet spoke from the forged blank, not applied as a decorative panel. This means the step depth is consistent across the full wheel and contributes to the overall bending stiffness of the spoke.

Does the asymmetric spoke spacing cause vibration? No. The asymmetric angle variation is within a range that does not produce harmonic imbalance at road-legal speeds. Each RS42 is dynamically balanced as part of PUR's quality control process before dispatch.

Can I order the two-tone finish with different colors on inner and outer planes? Yes. Two-tone finishing requires two separate painting operations and adds approximately one week to the standard production lead time.

How deep is the step on a 20×10 fitment? The step depth is approximately 12–15 mm on a 20×10 ET20 configuration. Exact figures vary by size; PUR can supply specific measurements on request.

Is the RS42 available with a polished inner barrel? Yes. Mirror-polished inner barrel is a standard option on all RS42 sizes.

What care does the step require? The step creates an internal corner that can trap brake dust. A thin detailing brush is recommended for reaching into the corner during regular cleaning. Otherwise, standard wheel cleaning procedures apply.

Discover Hodoor World

Hodoor World provides collectors and enthusiasts in the Asia-Pacific region with access to premium forged wheels from boutique American and European manufacturers. The catalogue covers both current production and discontinued heritage models — a valuable resource when searching for wheels that are no longer sold through standard dealer channels. Fitment accuracy is verified for right-hand-drive markets and Japanese domestic specification vehicles. Search the forged wheel catalogue by diameter, width, and bolt pattern.

All products ship internationally with full tracking. Import duty estimation for Japan, South Korea, Singapore, Hong Kong, and Australia is available at the checkout stage.

Wheel Care and Maintenance

• Rinse after every drive — road grime, brake dust, and winter salt accelerate surface oxidation; plain water and a soft cloth remove the majority of contaminants before they bond.
• pH-neutral cleaner only — forged aluminium reacts poorly with acid-based tyre cleaners and high-alkaline wheel sprays; always check the pH rating before application.
• Soft-bristle brush — for the spoke channels and barrel interior; steel-wool or abrasive pads will scratch the machined surface and remove polish.
• Dry thoroughly — especially the hub-bore area and lug seat; standing water in these zones causes galvanic corrosion at the hub interface over time.
• Apply wheel sealant — a dedicated ceramic or polymer sealant every 4–6 months creates a sacrificial layer that makes future cleaning faster and protects the finish from UV fade.
• Inspect hub-centric fit — at every tyre rotation, check that hub-centric rings (if used) are intact and have not cracked; a failed ring introduces micro-vibration that can crack the bore over time.
• Torque lug fasteners to spec — over-torquing distorts the seat; under-torquing allows movement. A torque wrench check after the first 50 km following any removal is best practice.

International Delivery

Hodoor World ships the PUR RS42 internationally to all major markets. Current primary destinations include: Japan, South Korea, Singapore, Hong Kong, Taiwan, Malaysia. Asia-Pacific luxury and sport car market — popular on JDM builds, Korean performance sedans, and regional supercar collections.

All shipments are sent fully insured and tracked from dispatch to delivery. Wheels are wrapped in protective foam and packed in reinforced export cartons suitable for air and sea freight. For time-critical orders, express air freight options are available on request.

Import duties and taxes vary by destination. Hodoor provides pre-shipment duty estimates for all listed markets; buyers can review full landed-cost breakdowns at checkout. For commercial or fleet orders of four or more sets, contact our B2B team for consolidated freight pricing. Questions about customs, lead time, or installation? Use the Hodoor contact form and a specialist will respond within one business day.