Dumb iron

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A dumb iron is a "curved side piece of a chassis, to which the front springs are attached."^[1]

Dumb irons are mainly featured on vehicles built before 1950, which had their front axle suspended on leaf springs. At the front of the car, dumb irons project forward, providing a location to attach the front of the leaf springs; The modern alternative is a suspension mount.

References

^ "Definition of dumb iron in English". Oxford Dictionaries. Retrieved 2025-06-30 – via Internet Archive.

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[1] "Definition of dumb iron in English". Oxford Dictionaries. Retrieved 2025-06-30 – via Internet Archive.

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