Volk Racing 21C Spec-SR Wheel

Volk Racing 21C Spec-SR Wheel

RAYS presents the Volk Racing 21C Spec-SR as a new ‘C’ for the 21st century, inheriting the DNA of Gr.C while leveraging modern design and analysis. Executed as a forged one-piece with step rims and widths suited to wide-body applications, it exemplifies what is achievable only through RAYS’ proprietary forging process. This limited specification debuts a special Luminous Bronze finish, evolving the design with a nostalgic character set against contemporary engineering — tailored for select iconic cars of the 1980s.

Dimple Design

• The dimpled spoke motif is a RAYS signature inherited from the Volk Racing Gr.C. Building on this hallmark, Volk Racing applies state-of-the-art design and analysis to evolve the concept, positioning the 21C as a new ‘C’ for the 21st century.

Bubble Back Processing

• Attention extends to the reverse side of the spokes. As expected, the cross section adopts a U shape, while the areas opposite each dimple are raised to secure sectional thickness — delivering optimized strength and rigidity.

Rim & Face

• Five rim depths from S (39mm) to LLL (108mm) and three face designs with varying concavity are offered. Executed as a forged one-piece with step-rim widths up to 12-inches, the 21C demonstrates what is achievable only through RAYS’ forging methodology.

A.M.T.

• ‘RAYS ENG. / FORGED / MADE IN JAPAN’ lettering is engraved on the center section using RAYS’ patented A.M.T. (advanced machining technology), underscoring the precision of the finish.

Shining Bronze Color

• A black base layered with a super-bright bronze topcoat creates dynamic tonal shifts depending on how the light hits. The high contrast between the diamond-cut rim and the super-luminous disc delivers a striking, unmistakable presence.

Features

• One-piece forged construction
• Gr.C-inspired dimpled spoke
• Stepped-rim architecture with deep-lip visuals and performance-focused geometry
• U-shaped spoke cross section
• Lightweight with high rigidity and impact resistance
• Five rim depths (S, M, L, LL, LLL)
• Three face profiles with size-specific concavity
• Shining Bronze Metal/Diamond-Cut Rim finish
• Supports wide-body applications
• Optimized strength-to-weight and rigidity
• Made in Japan quality and consistency
• Patented A.M.T. (advanced machining technology) branding machined directly on 3D curved surfaces
• Exceeds Japan’s JWL and VIA safety standards with RAYS’ own JWL+R Spec-2 rating
• Sold as a single wheel

Specifications

• Construction: Forged 1pc
• RAYS Original Test: JWL+R Spec-2
• Included: Polished air valve
• Color: Shining Bronze Metal/Diamond-Cut Rim
• Diameters:
  • 18in
• Widths:
  • 8.5in
  • 9in
  • 9.5in
  • 10.5in
  • 11in
• Bolt Patterns:
  • 5-100
  • 5-114.3
• Offsets:
  • -30 through +35

Notes

• Center caps not included, but are optional
• Sold as a single wheel

About RAYS / Volk Racing

Established in 1973, RAYS is a Japanese manufacturer and one of the world’s leading producers of high-quality, high-performance aluminum alloy wheels for both motorsports and street use. The company is best known for its flagship brand, Volk Racing, which has become synonymous with forged wheels designed for racing applications. With a strong commitment to engineering excellence and innovation, RAYS uses cutting-edge technology, such as its patented Advanced Machining Technology (A.M.T.), to create wheels that are not only lightweight and incredibly strong but also aesthetically striking. The company’s focus on durability, safety, and performance has earned them a prestigious reputation and a dominant presence in the global motorsports arena, from Formula 1 to the World Endurance Championship.