a short length of steel with one end flattened to form a blade, used as a crowbar for removing tires from wheel rims.
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Origin of tire iron
First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for tire iron
They wants to know if you can't be afther lending 'em a tire-iron?The Portal of Dreams|Charles Neville Buck