RAYS VOLK RACING TE37 ULTRA Forged Wheels
RAYS VOLK RACING TE37 ULTRA — TE37 Engineering for the Premium Performance Segment
The RAYS VOLK RACING TE37 ULTRA extends the TE37 family's engineering DNA into a dimension the original wheel never addressed: large-diameter, high-PCD fitment for premium performance cars and capable SUVs. Introduced in 2014, the TE37 ULTRA was RAYS Engineering's answer to demand from Porsche 911 owners, BMW M-series enthusiasts, and performance SUV drivers who wanted the TE37's forged monoblock pedigree without compromising the offset and hub dimensions their vehicles require. The result is a wheel that carries the six-spoke TE37 identity visually while incorporating the structural and dimensional reinforcements demanded by heavier, higher-torque platforms.
Available Sizes
- Diameters: 13" | 14" | 15" | 16" | 17" | 18" | 19" | 20" | 21" | 22" | 23" | 24"
- Available Widths: 5J to 14.5J
- Primary Applications: 19"–24" diameters for premium performance vehicles
- Bolt Patterns: 5×112, 5×120, 5×130, 5×114.3 and others on request
- Center Bore: 71.6mm (Porsche-spec) and 73.1mm standard; alternatives available
The TE37 ULTRA M-SPEC designation refers to a specific spoke and hub geometry variant developed for BMW M-series applications, with calliper clearance optimised for M Sport and M Performance brake systems. Standard TE37 ULTRA and M-SPEC variants are both available through our sourcing programme.
Need a Different Configuration?
Premium performance vehicles frequently carry unique dimensional requirements — Porsche's 5×130 bolt pattern on 20" diameter, BMW M's recessed hub face, or the oversized centre bore of certain Audi RS models. Our team maintains current specifications for TE37 ULTRA variants across all major European performance platforms and can confirm fitment before order placement. We also offer an AI Wheel Design Service if you want a custom spoke pattern or finish concept designed before committing to production.
Technical Specifications
- Construction: 1-piece forged monoblock (A6061-T6 aluminium alloy)
- Manufacturing: RAYS MAT (Multi Axial Technology) large-diameter die forging
- Spoke Design: 6-spoke TE37 geometry, reinforced hub-face construction
- Weight Range: 8.5 kg (19×9J) to 13.2 kg (22×11J)
- Surface Treatment: RAYS alumite-base with premium polyurethane clear
- Available Finishes: Diamond Dark Gunmetal, Gloss Black, Hyper Silver, Pressed Graphite
- Hub Face: Reinforced for high-torque platforms up to 500 Nm per axle
- Available Widths: 5J to 14.5J
- JWL-VIA Certified: Yes; TÜV certification available for EU market
Watch the RAYS VOLK RACING TE37 ULTRA in Action
Vehicle Fitment Guide
The TE37 ULTRA is purpose-designed for premium performance platforms that exceed the typical parameters of compact sports car applications. Confirmed popular fitments:
- Porsche 911 (991/992 generation): 20×9J ET+57 front / 20×11.5J ET+65 rear | 5×130 — staggered GT3-inspired fitment
- BMW M3 (F80/G80): 19×9.5J ET+40 | 5×120 — M Sport calliper clearance confirmed
- BMW M5 (F90/G60): 20×10J ET+40 | 5×120
- Audi RS6/RS7 (C8): 22×10J ET+35 | 5×112 — large-executive performance fitment
- Mercedes-AMG GT (C190): 20×9.5J ET+45 | 5×112
- Lamborghini Huracán: 20×9J ET+33 front | 5×112 — supercar application
- Porsche Cayenne Turbo: 22×10J ET+50 | 5×130
European platform hub-centric rings are included with applicable orders. Staggered fitment sets require separate front and rear size specifications — contact [email protected] for staggered-set pricing.
Other Bolt Patterns Available
- 5×108 — Jaguar F-Type, Land Rover Defender
- 5×112 — Audi, VW, Mercedes-Benz, Lamborghini Huracán platforms
- 5×120 — BMW M-series, Honda Civic Type R
- 5×130 — Porsche 911/718/Cayenne/Panamera all generations
- 5×114.3 — Nissan GT-R R35, Lexus ISF/RCF, Mitsubishi platforms
TE37 ULTRA Heritage: Scaling a Legend
The development brief that produced the TE37 ULTRA in 2014 was straightforward to articulate but technically demanding to execute: maintain the structural integrity and visual identity of the TE37 while scaling all dimensions to accommodate premium performance vehicles with larger wheel diameters, higher vehicle weights, and more powerful braking systems. RAYS Engineering's challenge was that the TE37's original design was optimised around 15"–18" diameters for Japanese sports cars weighing 1,000–1,400 kg. A Porsche 911 Turbo S weighs 1,640 kg and corners at lateral g-forces a Civic cannot approach; a BMW M5 Competition generates braking torques that would test any wheel's hub-face integrity.
RAYS addressed this by engineering the TE37 ULTRA with significantly thicker spoke roots and a reinforced hub-face casting that incorporates material in the spoke-hub transition zone specifically calculated to handle the increased torque and bending moments of large-displacement, high-torque platforms. The spoke geometry was reshaped to maintain the TE37's visual proportions at 19"–22" diameters without appearing bloated — a subtle but technically important exercise in scaling spoke width, depth, and separation to preserve the visual rhythm of the original design at larger diameters.
The M-SPEC variant, developed in direct collaboration with BMW M performance program teams, incorporated specific calliper clearance measurements taken from BMW M Sport and M Performance brake packages to guarantee zero interference fitment on M2, M3, and M4 applications with upgraded braking systems. This level of platform-specific engineering is characteristic of RAYS' approach to premium segment products.
Large-Diameter Forging Engineering
Forging wheels at 20"–24" diameters presents challenges that do not exist at 17"–18": the die size and press tonnage required scale non-linearly with diameter, and the aspect ratio of spoke length to cross-section becomes more extreme as diameter increases. RAYS' Shizuoka facility was upgraded with a larger-capacity forging press specifically to accommodate TE37 ULTRA production in the 20"–24" range — an investment that reflects the company's commitment to maintaining full-factory production quality across the premium segment.
Post-forging CNC machining on the TE37 ULTRA employs the same 5-axis milling centres used for smaller RAYS products, with toolpath programming specifically developed for the TE37 ULTRA's larger spoke lengths. The dimensional precision achieved — ±0.05mm across spoke faces — ensures the kind of balance performance expected by owners of Porsche and BMW vehicles, where wheel-induced vibrations are especially perceptible due to those vehicles' exceptional chassis communication.
TE37 ULTRA vs Large-Platform Competition
| Model | Construction | Weight 20×9.5J | Platform | Max Diameter |
|---|---|---|---|---|
| RAYS VOLK RACING TE37 ULTRA | Forged monoblock | ~9.8 kg | Porsche/BMW M/AMG | 24" |
| BBS FI-R | Forged monoblock | ~10.5 kg | BMW/Porsche/AMG | 21" |
| HRE Flowform FF01 | Flow-formed | ~10.2 kg | European GT | 22" |
| Forgeline GS1R | Forged monoblock | ~10.0 kg | GT/track | 21" |
Explore the RAYS VOLK RACING Lineup
- RAYS VOLK RACING TE37 — the original six-spoke forged monoblock, optimised for Japanese sports car fitments
- RAYS VOLK RACING TE37 SAGA — 25th anniversary TE37 with deepened concave and refined spoke proportions
- RAYS VOLK RACING TE37SL — street-durable TE37 variant with reinforced double-flange construction
- RAYS VOLK RACING TE37 SONIC — aerodynamic six-spoke engineered for Super GT high-speed applications
- RAYS VOLK RACING G25 — premium gran turismo multi-spoke for BMW and Japanese luxury GT platforms
- RAYS VOLK RACING G50 — five-spoke forged luxury for the finest premium sedan and coupe fitments
- Browse all forged wheels at Hodoor World
Can't Find the Right Size?
Staggered Porsche fitments, unusual M-series offset combinations, and supercar-specific specifications are all achievable. Hodoor offers a custom forged wheel manufacturing service with direct RAYS Japan production access for non-catalogue TE37 ULTRA configurations. You can also use our AI Wheel Design Service to visualise your concept before production begins.
How to Order the RAYS VOLK RACING TE37 ULTRA
- Confirm your vehicle's bolt pattern, hub bore, and minimum calliper clearance requirement
- Specify whether you require standard TE37 ULTRA or M-SPEC variant for BMW M applications
- Select diameter, width, and finish; note whether staggered front/rear sizing is required
- Submit enquiry to [email protected] — our team will provide calliper clearance confirmation
- Approve configuration and complete order — deposit required for custom and staggered sets
- Track delivery at hodoor.world
TE37 ULTRA Frequently Asked Questions
Q: What is the difference between TE37 ULTRA and TE37 ULTRA M-SPEC?
A: The M-SPEC (M-Specification) variant incorporates a modified inner hub-face geometry and spoke inset specifically engineered to clear BMW M Sport and M Performance brake callipers in 19"–20" applications. The standard TE37 ULTRA uses a universal geometry that may require spacers or professional fitment verification on BMW M models with upgraded braking systems. If you drive a BMW M vehicle, specify M-SPEC at order placement.
Q: Is the TE37 ULTRA appropriate for Porsche 911 GT3 RS?
A: The TE37 ULTRA is dimensionally compatible with Porsche 911 applications in 5×130 bolt pattern. For GT3 RS with carbon-ceramic brakes, calliper clearance verification is essential before ordering — contact our fitment team with your exact calliper specification. Note that Porsche centre-lock variants require a different conversion; standard five-bolt TE37 ULTRA is for conventional Porsche bolt pattern cars only.
Q: Does the TE37 ULTRA come with extended hardware for BMW hub-centric fitment?
A: Yes, European market TE37 ULTRA orders for BMW applications include hub-centric rings bridging from 73.1mm to BMW's hub bore. Extended bolts or adapter plates are not required for standard BMW fitments; they are bolt-on compatible with OEM BMW wheel bolt specifications.
Q: What is the maximum load rating of the TE37 ULTRA in 22" diameter?
A: RAYS publishes JWL-compliant load ratings with each product. For 22" applications, the TE37 ULTRA is rated for vehicle axle loads consistent with production GT cars including Porsche Cayenne and BMW M5. For exact load rating figures applicable to your specific vehicle and tyre combination, contact our technical team.
Discover Hodoor World
Hodoor World serves discerning buyers who demand RAYS Engineering quality on premium European and Japanese performance platforms. Our catalogue includes RAYS VOLK RACING, Brixton, Forgeline, Work Wheels, and other world-class forged wheel manufacturers. Visit hodoor.world for the full collection.
Wheel Care and Maintenance
TE37 ULTRA wheels on premium vehicles deserve premium maintenance protocols:
- Use pH-neutral wheel cleaner — avoid any cleaner that is not specifically safe for coated aluminium alloy
- On high-performance cars with large brake packages, clean after every spirited drive or track session
- Ceramic coating on all wheel surfaces is strongly recommended — it significantly reduces brake dust adhesion on large-diameter wheels that accumulate dust rapidly
- Annual professional wheel inspection and re-torque of wheel bolts is recommended for track-used vehicles
- For winter storage or salt-belt use, apply a dedicated wheel corrosion inhibitor to all exposed surfaces
- Torque to vehicle manufacturer specification — BMW M vehicles typically specify 120–130 Nm; Porsche typically 130 Nm
International Delivery
Hodoor World delivers RAYS VOLK RACING TE37 ULTRA sets globally. Large-diameter sets for European platforms are a logistics speciality — we ship to Germany, UK, Switzerland, France, USA, Canada, and all major markets with DDP service available. In-stock orders dispatch in 2–5 business days; special configurations from RAYS Japan production take 8–12 weeks. For staggered sets and non-catalogue specifications, contact [email protected] for consolidated freight options that reduce per-wheel shipping cost.
