Generated using the following Eukleides script, followed by judicious tweaking in en:Inkscape and manually editing the XML.

box(-2, -2, 10, 10)
cc = point(4,4)
Ci = circle(cc, 3)
Co = circle(cc, 4)
base = line(point(0,0), point(2,0))
vert = segment(point(4, 0), point(4,40))
ang = line(cc, 60:)
draw(Co)
draw(Ci)
mark(point(Ci, 60:), cc, point(4,6), backarrow, 3)
color(lightgray)
draw(base)
draw(vert)
mark(point(0,0), point(4,0), cc, right)
color(red)
draw(ang, dashed)
draw(segment(point(ang, -2), point(ang, 2)))
color(black)
draw(cc)

draw(point(ang, 2), box)
draw(point(ang, -2), box)
draw(point(vert, 2), cross)
draw(point(vert, 6), cross)

本作品已被作者英语维基百科的Ktims释出到公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： Ktims无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。Public domainPublic domainfalsefalse

• 2006-03-14 15:35 Ktims 600×600×0 (12061 bytes) Diagram indicating caster angle. The solid red segment indicates the steering axle, with the dashed red line indicating the pivot line. The gray shaded section would be the vehicle's tire.