from The Century Dictionary and Cyclopedia
- n. A tire-bolt; a conical-headed screw countersunk in the metal of a tire and passing radially through the felly, and held up by a nut on the inside over a curved washer-plate. It is intended to hold the tire in place sidewise and lengthwise, when the wheel is so light that a powerful shrinkage of the tire on the rim causes the wheel to go out of shape.
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