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A wheel alignment adjusting device in which adjustment of a toe angle can be effected accurately, precisely, easily, and in a short time. A wire is anchored to a supporting frame at which an endless track is provided. An intermediate portion of the wire is trained around a pulley of a rotary encoder

A wheel alignment adjusting device in which adjustment of a toe angle can be effected accurately, precisely, easily, and in a short time. A wire is anchored to a supporting frame at which an endless track is provided. An intermediate portion of the wire is trained around a pulley of a rotary encoder. A rotational angle of the supporting frame is transmitted to the rotary encoder with the rotational angle magnified. Accordingly, a minute angle can be measured accurately.

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1. A wheel alignment adjusting device, comprising:a unit which includes a wheel rotating device which rotates a wheel of a vehicle loaded on the wheel alignment adjusting device; a base which ratatably supports said unit on a horizontal surface; a rotational angle detecting device which is mounted t

1. A wheel alignment adjusting device, comprising:a unit which includes a wheel rotating device which rotates a wheel of a vehicle loaded on the wheel alignment adjusting device; a base which ratatably supports said unit on a horizontal surface; a rotational angle detecting device which is mounted to one of said unit and said base and which detects a rotational angle by rotating a rotational shaft of said rotational angle detecting device; and a wire member, one portion of the wire member being trained around the rotational shaft and another portion of the wire member being anchored to a predetermined position being of another of said unit and said base, the predetermined position being separated, in a radial direction, from a rotational center of said unit by a distance which is greater than a radius of the rotational shaft.