Mounting on the truck
ALgrease
Before mounting, lubricate the spigots or the wheel hub bore with ALgrease. This minimizes corrosion between the wheel and hub. Do not lubricate the face of the wheel or hub. ALgrease or equivalent lubricants are heat resistant and are safe for aluminium and tyres. They can also be used for mounting tyres and valves. Other lubricants that are water-based or contain heavy metals can cause corrosion and should not be used. ALgrease can be ordered from your Alcoa distributor.
For further information a separate ALgrease leaflet is available.
Torque
Always use the correct torque:
Cap nuts: recommended by truck/ axle manufacturer.
Valves: 9.0-14.6 Nm.
Check the torque of valves and cap nuts frequently.
Disc thickness & thread engagement
The mounting flange of Alcoa wheels is thicker (21 to 28 mm) than the mounting flange of steel wheels (11 to 13 mm) and requires different mounting hardware.
Therefore either use:
To ensure correct mounting there must be enough thread engagement:
If less, the stress on the threads may cause cracking or breaking of the stud. This could cause loss of the wheel with serious injuries and damage as a result.
Hub centring & cap nuts
All European Alcoa wheels are hub centred type wheels. European Alcoa wheels have cylindrical boltholes and are not suitable for bolt centring with conical or spherical nuts. These types of mounting systems must never be used on European Alcoa wheels. If used, the warranty is voided and severe consequences, such as cracking or wheel failure could result. Even worse, this could lead to wheel loss leading to serious injury or death.
Only two piece cap nuts with an integral, freely turning washer designed for hub centring mounting systems must be used for fastening European Alcoa wheels
For single and dual mounting, the spigots should be in contact with the wheels for at least 3 mm. Longer spigots make mounting easier
Following sleeved cap nut types are available: M22 x 1.5, M20 x 1.5, M18 x 1.5, 7/8"-14 UNF and 7/8"-11 BSF
Tyres
European Alcoa wheels have a 15° bead seat angle and only accommodate tubeless tyres with a 15° bead. Never use tube type tyres or tyres with different angled beads on European Alcoa wheels.
Technical data sheet
For reference see our latest Technical Data sheet with details about: disc thickness, number of mounting holes, bolt hole diameters, hub or centre hole diameter and bolt circle diameter.
Tyre mounting
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