{"product_id":"titanium-m12-conical-lug-bolts-bmw-pitch-1-5mm","title":"Titanium bolts M12×28 35mm Conical Seat Lug Bolt Sets for BMW cars, Pitch 1.5mm, by Tianswer","description":"\u003cp\u003e\u003cstrong\u003eMotorsport-grade Aerospace Ti-6Al-4V Grade 5 titanium M12 × 1.5mm 60° conical cone seat wheel lug bolts engineered for classic BMW E-chassis, performance track cars, and European sports coupes, offering a 45% rotational mass reduction over factory steel hardware.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003ePackage Options \u0026amp; Vehicle Axle Configurations\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSet of 5 (1 Wheel):\u003c\/strong\u003e 5-bolt package for single-wheel replacement, spare tire setup, or fitment testing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSet of 10 (Front or Rear):\u003c\/strong\u003e 10-bolt package for one complete axle (front or rear 2 wheels).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSet of 20 (Full Car):\u003c\/strong\u003e 20-bolt complete car package for all 4 wheels on 5-lug classic BMW platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUnsprung \u0026amp; Rotational Mass Reduction for Classic BMW Driving Dynamics\u003c\/h3\u003e\n\u003cp\u003eRenowned BMW sports coupes like the E30 M3, E36, and E46 M3 rely heavily on suspension agility and tactile road feedback. Replacing heavy factory steel lug bolts (~75–85 grams each) with Tianswer Grade 5 titanium wheel bolts (~36–42 grams each) removes approximately 800 grams of unsprung rotating mass across all four hubs. This reduction lowers rotational inertia at axle speed, allowing dampers to react quicker over track kerbs and rough pavement while enhancing tactile steering precision.\u003c\/p\u003e\n\n\u003ch3\u003ePrecision 60° Conical Cone Seat \u0026amp; 17mm Hex Head\u003c\/h3\u003e\n\u003cp\u003eAccurately CNC-machined with a standard 60-degree taper cone seat, these bolts guarantee 100% concentric seating and uniform clamp load against factory BMW OEM alloy wheels and popular motorsport wheels (BBS, Apex ARC-8\/FL-5, Enkei, Volk Racing, and OZ Racing). The 17mm external hex head provides full tool engagement with standard thin-wall automotive sockets, preventing scratched wheel finishes and rounded bolt corners.\u003c\/p\u003e\n\n\u003ch3\u003eDirect Fitment for Classic BMW E-Chassis \u0026amp; European Sports Cars\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct, precision drop-in replacement for European vehicles utilizing M12 × 1.5 wheel hubs with 60° cone seats, including:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBMW 3 Series:\u003c\/strong\u003e E30 (5-lug M3), E36 (318i, 325i, 328i, M3), E46 (323i, 325i, 328i, 330i, M3), E90 \/ E92 \/ E93 (328i, 335i, M3)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBMW 1 Series:\u003c\/strong\u003e E82, E88 (128i, 135i, 1M Coupe)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBMW 5 \u0026amp; 6 Series:\u003c\/strong\u003e E28, E34, E39, E60 (525i, 528i, 530i, 540i, M5), E63 \/ E64 (645Ci, 650i, M6)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBMW Z Series:\u003c\/strong\u003e Z3 (Roadster, Coupe, M), Z4 (E85, E86 3.0si, M Coupe\/Roadster)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOther European Platforms:\u003c\/strong\u003e Lotus Elise \/ Exige (specifying M12x1.5 conical), vintage Porsche 924 \/ 944 conversions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShank Length Options: OEM Stock (28mm) vs. Spacer Fitment (35mm)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28mm Shank Length:\u003c\/strong\u003e Direct OEM factory replacement for stock wheel offsets without wheel spacers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e35mm Shank Length:\u003c\/strong\u003e Extended shank length specifically intended for vehicles running 5mm to 8mm wheel slip-on spacers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHot-Forged Head \u0026amp; Rolled M12 × 1.5 Threads\u003c\/h3\u003e\n\u003cp\u003eEach bolt is manufactured from certified Grade 5 (Ti-6Al-4V) titanium bar stock featuring hot-forged heads and precision CNC rolled threads. Thread rolling burnishes the root radius and maintains an uninterrupted metallic grain flow, delivering exceptional tensile strength (≥ 950–1050 MPa) and resistance to fatigue failure under heavy braking torque and track-day thermal expansion.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications \u0026amp; Dimensions\u003c\/h3\u003e\n\u003cp\u003e\n  \u003cstrong\u003eMaterial:\u003c\/strong\u003e Certified Aerospace Ti-6Al-4V (TC4) Titanium Alloy, Grade 5\u003cbr\u003e\n  \u003cstrong\u003eThread Diameter:\u003c\/strong\u003e M12\u003cbr\u003e\n  \u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 1.5mm Metric Pitch (Classic BMW OEM Spec)\u003cbr\u003e\n  \u003cstrong\u003eAvailable Shank Lengths:\u003c\/strong\u003e 28mm (OEM Stock) and 35mm (For 5–8mm Spacers)\u003cbr\u003e\n  \u003cstrong\u003eSeat Type:\u003c\/strong\u003e 60-Degree Conical (Cone \/ Taper) Seat\u003cbr\u003e\n  \u003cstrong\u003eHead Style:\u003c\/strong\u003e 17mm External Hex Head\u003cbr\u003e\n  \u003cstrong\u003eHead Outer Diameter:\u003c\/strong\u003e 23mm\u003cbr\u003e\n  \u003cstrong\u003eHead Height:\u003c\/strong\u003e 21mm\u003cbr\u003e\n  \u003cstrong\u003eWeight:\u003c\/strong\u003e ~36g (28mm), ~42g (35mm)\u003cbr\u003e\n  \u003cstrong\u003eYield Strength:\u003c\/strong\u003e ≥ 880 MPa | \u003cstrong\u003eTensile Strength:\u003c\/strong\u003e ≥ 950–1050 MPa\u003cbr\u003e\n  \u003cstrong\u003eAvailable Finishes:\u003c\/strong\u003e Natural Titanium, PVD Vacuum-Coated Gold, Rainbow, Burn Blue, PVD Deep Black\n\u003c\/p\u003e\n\n\u003ch3\u003eInstallation, Anti-Seize \u0026amp; Torque Recommendations\u003c\/h3\u003e\n\u003cp\u003eThoroughly clean wheel hub threads of all dirt and rust before mounting. Always thread each bolt by hand for at least 6.5 to 7 full rotations to verify smooth engagement into the hub before using tools. Apply a thin, uniform film of high-temperature titanium anti-seize paste or copper lubricant to the threads (keep the conical seat face dry and clean). Using a calibrated manual torque wrench with a plastic-sleeved 17mm socket, tighten in a star pattern to 110–120 N·m (81–88 lb-ft). Re-check torque after the first 100 km (60 miles). Never use pneumatic or electric impact wrenches. For more insights on unsprung mass and wheel dynamics, read our technical guide: \u003ca href=\"\/vi-vn\/blogs\/technical-resources\/the-science-of-unsprung-weight-why-titanium-lug-bolts-matter-for-high-performance-cars\"\u003eThe Science of Unsprung Weight: Why Titanium Lug Bolts Matter for High-Performance Cars\u003c\/a\u003e.\u003c\/p\u003e","brand":"Tianswer","offers":[{"title":"Rainbow \/ M12×28mm \/ Set of 5 (1 Wheel)","offer_id":46188645024001,"sku":"TS-M12-LUG-BMW-P150-28-RB-5PK","price":54.56,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M12×28mm \/ Set of 10 (Front or Rear)","offer_id":50776670175489,"sku":"TS-M12-LUG-BMW-P150-28-RB-10PK","price":109.12,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M12×28mm \/ Set of 20 (Full Car)","offer_id":50776670208257,"sku":"TS-M12-LUG-BMW-P150-28-RB-20PK","price":218.24,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M12×35mm \/ Set of 5 (1 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