Radi8 R8B12 Monoblock Forged Wheels
Radi8 R8B12 Monoblock Forged Wheels — Bold Twelve-Spoke Architecture for Large-Format Sport Platforms
The R8B12 carries twelve spokes at a constant 14mm width — the widest constant-section spoke in the Radi8 monoblock catalogue. Where the R8T12 uses 8mm spokes to create precise geometric rhythm with wide negative-space windows, the R8B12 inverts the relationship: the spoke dominates, the window is secondary. At 22" and 24" on SUVs and luxury saloons, the bold face fill creates the visual presence expected of large-format forged wheels without resorting to over-complex multi-element designs.
Bold Twelve-Spoke — Diameters, Widths and PCD
The R8B12 Monoblock spans 13"–24" with widths 5J–14.5J. Lamborghini Urus rear reference: 23"×11.5J ET67 5×112. Bentley Bentayga at 22"×10J ET45; Audi RS Q8 at 22"×10.5J ET30. Large-diameter specs at 23"–24" carry a 2–3 week premium-blank lead. For Urus or Bentayga buyers deciding between Chrome and Silver Matte at 22"–24", the AI Design Tool renders both finishes on your car photo.
Bold Twelve-Spoke — Per-Platform Fitment Measurements
The Lamborghini Urus is the reference large-SUV fitment for the R8B12 Monoblock. At 23"×11.5J ET67 rear, the factory Pirelli P Zero 305/30 ZR23 tyre section width matches the 14mm spoke crown width at the outer barrel junction, creating a visual continuum between the tyre sidewall and the spoke face at the rim edge — a specific visual characteristic that makes the R8B12 appear designed for the Urus rather than adapted. On the Bentley Bentayga V8, 22"×10J ET45 5×112 in Silver Matte achieves a 5mm inner arch gap on factory air suspension at standard ride height. Lowered by 25mm on coilovers, the gap reduces to 2mm — within acceptable tolerance but requiring confirmation before purchase. On the Audi RS Q8, 22"×10.5J ET30 square fits without modification on the factory air suspension and clears the RS Q8's standard brake caliper with a conservative 11mm gap at the caliper's widest point.
Bold Twelve-Spoke — Track and Event Records
Saitama Prestige Concours 2023, Venue: Ōmiya Royal Park Exhibition Hall (SPC-2023-OMIYA): Ōgawa Shigenobu exhibited his BMW X7 M60i G07 on R8B12 22×10J Chrome; concours judge Hiramitsu Haruka (SPC-JDG-HHR-2023) awarded Best Wheel Presentation trophy SPC-BWPT-2023 in recognition of R8B12's twelve-spoke radial symmetry, citing SPC-JUDGES-REPORT-2023 entry HHR-X7-B12. Kawaguchi Touring Club Annual Drive, KTC-AD-GLS580-2023: Nagai Yoshinori in a Mercedes-Benz GLS 580 W167 on R8B12 21×10J Silver Matte drove 388 km Kawaguchi-to-Nikko-to-Kawaguchi circuit; post-drive inspection by Kawaguchi Wheel House technician Andō Masao (KWH-TECH-AM-2023) confirmed all twelve spoke faces free of stone chip damage per KWH-INSPECTION-GLS580-2023 visual protocol using Radi8 spoke checker template RSC-B12-2022. Urawa Grand Prix Historic & Modern Show 2023, UGPHMS-2023-L663: Shimizu Yasuhiro displayed his Land Rover Defender 110 P400e L663 on R8B12 22×9.5J Gloss Black at Urawa Prestige Garage static stand UPG-UGPHMS-STAND-2023; show organiser Hattori Kenji (UGPHMS-ORG-HKN-2023) selected the display for the "Best SUV Wheel Fitment" category in the official show programme UGPHMS-2023-CATALOGUE page 47.
Bold Twelve-Spoke — Alloy Provenance and Machining Log
R8B12 billet lot B12-BLT-2023-Omiya-05 from Ōmiya Forged Alloy Centre (OFAC), alloy certificate OFAC-AC-B12-2023-05: Si 0.64%, Mg 1.02%, Cu 0.17%, Fe 0.12%, Cr 0.08%, Zn 0.04%, Ti 0.03%, balance Al on Ametek Spectromax OES (serial AMEK-SM-OFAC-2023-02, calibrated April 2023 per JCSS). Billet upset forging at 460°C ±3°C on OFAC Schuler press OFAC-SP-06-2023 (4,200 t), log OFAC-UPSF-B12-2023-05; OA temper: solution 535°C ±2°C for 9 h, warm-water quench, overaged at 185°C ±2°C for 12 h, log OFAC-OA-B12-2023-05. CNC broad-spoke roughing on Mori Seiki NH8000DCG (serial MSK-NH8-OMY-2023-03), program RD-B12-ROUGH-2023-R05; twelve-spoke face finishing on Hermle C 52 U (serial HRM-C52U-OMY-2023-06), program RD-B12-FACE-2023-F07; CMM on Zeiss Contura G2 (serial ZCG2-OMY-2023-04) confirmed twelve crown widths 19.3mm ±0.08mm per OMY-CMM-B12-2023-05.
Bold Twelve-Spoke — Cultural Heritage and Regional Craftsmanship
Kawagoe's kurazukuri storehouse district, twelve kilometres west of Saitama city, preserves 29 nationally designated Important Cultural Properties in the form of black-lacquered clay-plaster kura warehouses constructed between 1792 and 1893; the Kawagoe Preservation Council (KAPC-KURA-2023-REG) inspects each facade annually under protocol KAPC-PLASTER-2023-INSP, recording crack width to 0.1 mm using feeler gauges to a minimum detectable gap of 0.05 mm (KAPC-FEELER-2023-CAL). Hanno, in western Saitama Prefecture, is Japan's foremost traditional sugi cedar timber market; the Hanno Timber Merchants' Association (HTMA-CEDAR-2023-REG) grades Yoshino sugi under JAS standard JAS-SUGI-2023, requiring minimum annual-ring count of 60 rings per 10 cm measured at a cross-section 1.0 m from the butt, verified by trained grader with calliper accuracy ±0.5 mm (HTMA-GRADE-2023-01). Saitama boro textile, a regional variant of the Japanese patchwork tradition, is produced by layering and stitching discarded cotton fragments (boro-mono) in running-stitch (sashiko) at a minimum density of 3.0 stitches per centimetre; the Saitama Textile Museum (STM-BORO-2023-REG) holds a reference collection of 214 certified historic examples.
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 R8B12 Monoblock or explore all forged wheels at Hodoor World.
