Installation instructions: http://data.radiumauto.com/PublicDocs/19-0015.PDF

These fasteners 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 has 94% the yield strength of a metric Grade 10.9 steel fastener and is over 43% lighter.

Picture shows weight comparison of 16 bolts: steel lug bolts (2lb, 9.9oz), and Radium Ti bolts (1lb 7.9oz).



Mechanical Properties:

- Grade 5 6AL-4V Titanium.
- Yield Strength: 890MPa.
- Ultimate Tensile Strength: 952MPa.
- Shear Strength: 550MPa.
- Density: 4428 kg/m^3.

Lug Bolt Features:

- Material: Grade 5 Titanium.
- Threads: Rolled M12x1.5mm.
- Thread Length: 28mm.
- Taper: 60 Degree Conical.
- Hex Head Size: 17mm.

*The factory Lotus Elise/Exige/211 uses 22mm or sometimes 25mm. The factory Lotus Evora uses 28mm Length Lug Bolts. The factory BMW M3 uses 25mm Length Lug Bolts.



Radium Titanium Lug Bolts are track tested.



A non marring 17mm socket is recommended, but not mandatory. They are available by many manufacturers for less than $15USD. Here is a link to one from Titan Tools.

Universal product for all Evo Models. Please select from the options on the right.

Stock images used. Actual product may vary.