Thread: Front steer on a Deuce

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The best way to measure for adequate ground clearance is to simulate a flat/blown tire. This is sometimes called a "scrub-line" test. The object is to have enough clearance so when a flat or blow-out occurs, nothing would come into contact with the ground and potentially cause the car to lose control.

Scrub Line: On both the front and rear suspension of the vehicle, stretch a taut string from the bottom of each wheel rim to the bottom of each of the other three tires at the road surface. If any part of the steering, suspension, or chassis is below this string, the vehicle will fail scrub line. Allow an additional ¼ inch assuming the tire will not come off the rim if the tire should go flat. Items exempt from scrub line check will include body sheet metal, bumpers, exhaust system, oil and transmission pan.