When setting up a race car, achieving a perfectly "square" chassis and rear axle is the absolute foundation of consistent handling. Even a fraction of an inch of misalignment in the wheelbase or axle tracking will cause a car to bind in the corners or dog-track down the straightaways. The Longacre 50820 Plumb Bob Kit is the traditional, foolproof tool that professional chassis builders and DIY racers rely on to establish true vertical reference points and accurately map their suspension geometry directly onto the shop floor.
Unlike generic, lightweight hardware store plumb bobs that sway easily, these Longacre bobs are specifically designed for the garage environment. The kit includes two solid steel bobs and the required setup string. They are ideal for dropping vertical lines from the chassis rails, ball joints, or axle tubes to the ground, allowing mechanics to accurately measure wheelbase, check track width, or string the car to measure toe and rear-end squareness.
Key Features
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Complete Setup Kit: Includes two high-density steel plumb bobs and the necessary setup string, providing everything a mechanic needs to start dropping chassis points immediately without hunting for extra parts.
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Heavyweight Steel Construction: Made from solid steel, these heavy bobs resist swinging in breezy pit lanes or drafty garages, ensuring the string drops dead-straight for pinpoint-accurate chalk or tape marks on the floor.
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Racing-Specific Application: The absolute best, most cost-effective way to "square the rear end" of a dirt late model, modified, or drag car to ensure the thrust angle is perfectly aligned with the front centerline.
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Multi-Use Versatility: While heavily used in motorsports pit stalls, these are equally valuable for custom tube-chassis fabrication, roll cage building, or any precision measurement work requiring a true vertical line.
