| 摘要 |
PROBLEM TO BE SOLVED: To provide a slide rule for wheel alignment, capable of simply finding the outside diameter of a tire, whereby a tow angle can be converted to a tow distance. SOLUTION: A board 1 and a rotary plate 2 are rotatably connected to each other. The board 1 is provided with a tire outside diameter scale 6, an outside diameter and section height scale 7, a tire width scale 9, and a tow distance scale 10. The rotary plate 2 is provided with a wheel size scale 13, a tire oblateness scale 15, a tow angle scale 17 and a cursor line 16, and further provided with windows 11, 12 for seeing the outside diameter and section height scale 7, the tire width scale 9 and the tow distance scale 10 of the board 1. According to the tire width, the tire oblateness and the wheel size indicated on the tire, the rotary plate 2 can be rotated to find the tire outside diameter. The tow angle can be converted to the tow distance.
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