// wheel.scad

// I don't actually need spoked wheels


// ISO standard numbers refer to the tyre bead diameter in
// millimetres; the outer diameter of the rim is about 14mm 
// more. Rim width varies but 22mm is common. The wheel sizes 
// I'm interested in are ISO 406 and ISO 451. Fronmt hubs (and 
// the hubs I'm planning to use are all front hubs) typically
// have an over locknut dimension of 100mm, but the lefties, 
// which I plan to use, are narrower: 50mm flange to flange, and
// 65mm overall (with a 5mm spacing to the inner side of the
// fork leg).
//
// Outer diameter over the inflated tyre is obviously larger than
// the rim diameter but how much larget depends on the tyre; 
// for road tyres, 20mm seems about typical.

module wheel (iso=451) {
    radius=(iso/2)+7;
    
    // rim
    color("grey")
    difference() {
        cylinder(h=22, r=radius, center=true);
        translate([0,0, -11])
            cylinder(h=26, r=(radius-10));
    }
    
    // carbon cones covering the spokes
    color("black")
        translate([0,0, 4])
        cylinder(h=26.6, r1=radius, r2=22.5);
    color("black")
            mirror([0, 0, -1])
        translate([0,0, 4])
                cylinder(h=14.4, r1=radius, r2=29);   
    
    // tyre
    color("black")
    rotate_extrude(convexity = 10)
    translate([radius +10, 0, 0])
        circle(r = 12, $fn = 100);
    
    // hub
    color("grey")
    translate([0, 0, -40])
    cylinder(h=65, r=22.5);
    
    // axle 
    color("silver") {
        translate([0, 0, -45])
            cylinder(h=70, r1=12.5, r2=7.5);
        translate([0, 0, -85])
            cylinder(h=40, r=12.5);
    }
    
}

// wheel();