These new RADIUM Engineering lug bolts are machined from forged 6AL-4V (Grade 5) Titanium alloy rod. They feature a 60 degree tapered conical seat compatible with most OEM and aftermarket wheels. The threads are rolled, not machined, for superior strength and wear resistance. Grade 5 Titanium is 94% the yield strength of metric grade 10.9 (OEM lug bolt steel) and are also over 43% lighter than steel.
Bottom Left: Set of 16 Steel Lotus Elise Lug Bolts: 2lb 9.5oz
Bottom Right: Set of 16 Titanium Radium Lug Bolts: 1lb 7.9oz
Radium Lug Bolt Mechanical Properties:
Grade 5 6AL-4V Titanium
Yield Strength: 890MPa
Ultimate Tensile Strength: 952MPa
Shear Strength: 550MPa
Elongation: 15%
Reduction of Area: 31%
Density: 4428 kg/m^3
For comparison, some other common lug nut/bolt materials:
Grade 5 Alloy Steel
Yield Strength: 634MPa
Ultimate Tensile Strength: 827MPa
Shear Strength: 496MPa
Density: 7861 kg/m^3
Grade 8 Alloy Steel
Yield Strength: 896MPa
Ultimate Tensile Strength: 1034MPa
Shear Strength: 620MPa
Density: 7861 kg/m^3
7075 Aluminum
Yield Strength: 503MPa
Ultimate Tensile Strength: 572MPa
Shear Strength: 331MPa
Density: 2823 kg/m^3
Our titanium fasteners come in Anodized Green or Nano Ceramic Hardened Gray with a laser etched logo.
They are a direct swap and simple installation for the Lotus ELISE, EXIGE and EVORA.
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