Under FMCSA regulations, what is the minimum brake lining/pad thickness before a vehicle must be placed out of service?
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A
Linings must be replaced before metal-to-metal contact; specific minimums vary by axle position per 49 CFR 393
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B
1/8 inch for all axle positions
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C
1/4 inch for all positions
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D
Lining thickness is not regulated federally