Weight of wheel

[NaN]

It is calculated from tire dimensions. The densities are chosen to match real world tire/rim weight.

Code:

    // calculate wheel inertia/mass
    float tire_radius = tire.GetRadius();
    float tire_width = tire.GetSidewallWidth();
    float tire_thickness = 0.05;
    float tire_density = 8E3;
    
    float rim_radius = tire_radius - tire_width * tire.GetAspectRatio();
    float rim_width = tire_width;
    float rim_thickness = 0.01;
    float rim_density = 3E5;
    
    float tire_volume = tire_width * M_PI * tire_thickness * tire_thickness * (2 * tire_radius  - tire_thickness);
    float rim_volume = rim_width * M_PI * rim_thickness * rim_thickness * (2 * rim_radius - rim_thickness);
    float tire_mass = tire_density * tire_volume;
    float rim_mass = rim_density * rim_volume;
    float tire_inertia = tire_mass * tire_radius * tire_radius;
    float rim_inertia = rim_mass * rim_radius * rim_radius;