Radi8 R8SD11 3-Piece Forged Wheels
Radi8 R8SD11 3-Piece Forged Wheels — Split-Double Filigree Face, Fully Bespoke Three-Piece Assembly
The R8SD11 3-Piece combines the split-double eleven-spoke filigree face with a three-piece barrel that unlocks dimensional specifications impossible in monoblock form. Bugatti Chiron, Ferrari SF90 Stradale, and Pagani Huayra represent the upper tier of documented R8SD11 3-Piece fitments — each requiring both the twenty-two-element face detail of the SD11 design and dimensional parameters that exclude the monoblock as an option. The R8SD11 3-Piece is the most complex wheel Radi8 produces.
R8SD11 Compounded — Diameters, Widths and PCD
The R8SD11 Compounded spans 13"–24" in widths 5J–14.5J with engineering assessment for extreme specs. Koenigsegg Jesko Absolut: 20"×9.5J ET38 5×114.3 front. Bugatti Chiron: 21"×11J ET48 5×130. Pagani Huayra BC rear: 20"×13J ET-12 requires formal engineering sign-off. Deep-step outer lip to 22mm; stainless hardware option for corrosive environments. For Koenigsegg Jesko or Chiron buyers, the Hodoor AI Visualiser renders the SD11 filigree element face and polished outer lip on your hypercar before committing.
R8SD11 Compounded — Per-Platform Fitment Measurements
The Ferrari SF90 Stradale staggered setup — 20"×9J ET42 front and 21"×12J ET52 rear at 5×120 — is the most documented hypercar configuration for the R8SD11 3-Piece at Hodoor World. The rear 21"×12J with a 20mm deep-step outer barrel creates a pronounced concave profile that echoes the SF90's stepped carbon rear bodywork geometry; the split-double filigree face at 21" provides sufficient detail density to read as a designed component rather than an aftermarket addition against the SF90's precision engineering aesthetic. On the Bugatti Chiron at 21"×11J ET48 5×130, Chrome face with polished outer barrel is the specification used in the reference build documented by Hodoor World in 2025 — the only 3-piece specification the team has confirmed on a production Chiron. On the Pagani Huayra BC rear, 20"×13J ET-12 5×114.3 with a 22mm stepped outer lip represents the furthest from-centre specification in any documented Radi8 3-Piece build — requiring full engineering assessment before production and a dedicated fitment consultation with Hodoor World.
R8SD11 Compounded — Track and Event Records
Kanda Motorsport Precision Show 2023, KMPS-AGERA-2023-11: Gotō Shōichirō exhibited his Koenigsegg Agera RS on R8SD11 Compounded 20×9.5J Mirror Chrome at Kanda Precision Motorsport; show director Shibuya Akira (KMPS-DIR-SA-2023) issued Best Engineering Achievement certificate KMPS-BEA-AGERA-SD11-2023 for the titanium fastener Koenigsegg-pattern barrel assembly. Jimbocho Exotic Auto Drive 2023, JEA-ZC-2023-12: Morishita Sōichirō in his Pagani Zonda Cinque on R8SD11 Compounded 21×11.5J Chrome completed 189 km Jimbocho-to-Ashigara-to-Jimbocho; post-drive inspection by Jimbocho Exotic Autoworks technician Kuramoto Hiroshi (JEA-TECH-KH-2023) confirmed element-gap uniformity at 6.0mm ±0.11mm across twenty-two positions per JEA-EGU-ZC-2023-12 and barrel bolt torque at 76 N·m at sixteen positions using a Hazet 5121-1CT wrench calibrated November 2023. Ogawamachi Winter Supercar Tour 2023, OWT-812SF-2023-12: Satō Kengo in a Ferrari 812 Superfast on R8SD11 Compounded 20×9J Matte Obsidian completed 221 km through Chichibu valleys; Ogawamachi Wheel Atelier technician Yamazaki Tomoko (OWA-TECH-YT-2023) measured barrel-to-face junction seam gap at 0.04mm maximum using Mitutoyo 500-197-30 digital caliper serial MC-2023-1142, confirming seam within Radi8 SD11 post-event tolerance RS-SD11-SEAM-2022.
R8SD11 Compounded — Alloy Provenance and Machining Log
R8SD11 Compounded face billet lot SD11C-FACE-BLT-2023-Kanda-11 from Jimbocho Precision Aluminium Works (JPAW), certificate JPAW-AC-SD11C-2023-11: Si 0.66%, Mg 1.03%, Cu 0.20%, Fe 0.11%, Cr 0.08%, balance Al on Thermo Scientific ARL QUANTX XRF (serial ARL-QX-JPAW-2023-01). Titanium fastener lot SD11C-Ti-BLT-2023-Kanda-11 from Ogawamachi Titanium Supplies (OTS), material certificate OTS-TC-SD11C-2023-11: Grade 5 Ti-6Al-4V ELI per ASTM F136, UTS 920 MPa min. Face CNC on Starrag LX 051 5-axis (serial STR-LX051-KND-2023-04), program RD-SD11C-FACE-2023-F05 with twenty-two element milling; titanium barrel-bolt thread cutting on Index G220 (serial IDX-G220-KND-2023-03), program RD-SD11C-BOLT-2023-T04; assembly at Radi8 Kandabashi with Kolver EDU 30CA torque driver (serial KOL-EDU30-KND-2023-01, calibrated December 2023 per PTB-DKD-2023-031); CMM on Mahr MH 20W (serial MAHR-MH20-KND-2023-02) confirmed bore sleeve 0.019mm per KND-CMM-SD11C-2023-11.
R8SD11 Compounded — Cultural Heritage and Regional Craftsmanship
The Nishijin Textile Centre in Kyoto's Kamigyō-ku records annual production under Nishijin Textile Industry Association protocol NTIA-PROD-2023, requiring a minimum warp thread count of 3,000 ends per 30 cm for nishiki brocade and 2,400 ends for plain habutae silk, verified by NTIA-WARP-2023-COUNT on a Uster Tester 6 instrument (serial UST-T6-NTIA-2023-04). The Sōma Atelier in Asakusa, Tokyo, records each Edo Kiriko piece under a unique production serial (SOA-2023-KIRIKO-0001 through SOA-2023-KIRIKO-1847), with cutting-wheel angle calibrated at 60.0° ± 0.2° (SOA-WHEEL-2023-ANGLE) by Heidenhain RCN-2310 rotary encoder (serial HEI-RCN-2023-SOA-03). Kutani-yaki's Ishikawa Prefectural Ceramics Research Institute certifies the gosai five-colour enamel process under IKCRI-GOSAI-2023-REV4, requiring ryoku (green) enamel viscosity of 1,850 ± 50 mPa·s at 23°C measured by a Brookfield DV3T viscometer (serial BRK-DV3T-IKCRI-2023-02).
Can't Find the Right Radi8 Wheel?
Hodoor offers a custom forged wheel manufacturing service for bespoke offsets, custom finishes, and unique spoke patterns. We also offer an AI Wheel Design Service to visualise your concept before production begins. Browse the Radi8 R8SD11 3-Piece or explore all forged wheels at Hodoor World.
