This paragraph has a coupled of things I don't understand:

A large number of native-owned cars have their front wheels toed in at the top. This is apparently king-pin wear, since their owners never give them any attention beyond gas, oil and water, so long as they will run.

  1. What does it mean for the front wheels to be toed in at the top?
  2. What does king-pin wear mean?
  • ozebiz.com.au/racetech/theory/align.html Also look up automotive steering king-pin. -- wear and tear of the king-pin.
    – Jim
    Commented Mar 17, 2015 at 21:18
  • 1
    A "king pin", on older style cars and many trucks, is the main hinge pin for the front wheel steering. Terms like "toe-in" unfortunately have several different interpretations, depending on who is talking.
    – Hot Licks
    Commented Mar 17, 2015 at 21:25
  • Strictly speaking, it means that the writer doesn't know much about auto mechanics :-) Toe-in is when the front of the wheels are closer together than the back. What is meant here appears to be camber: en.wikipedia.org/wiki/Camber_angle
    – jamesqf
    Commented Mar 18, 2015 at 1:08

1 Answer 1


A king-pin is a component of a beam suspension. (used frequently in heavy duty trucks) It is the pin that connects various components at the hub.

If the wheel is "toed in at the top" the wheel is farther in at the top than the bottom. Typically if you hear of a modern car with "toe in," it means the front of the tire is farther in than the back.

"King-pin wear" would mean that the pin was wearing and getting lose. Extra "toe in at the top" would indicate that the pin was no longer holding all of the suspension parts in their correct positions.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.