haulrecordFMCSA data

Violation codes / 393.75A2

49 CFR 393 · Parts and accessories

393.75A2

What it means

Tire-tread and/or sidewall separation

What the rule actually says

This violation cites 49 CFR 393.75, tires. The regulation reads:

(a) No motor vehicle shall be operated on any tire that—

(1) Has body ply or belt material exposed through the tread or sidewall,

(2) Has any tread or sidewall separation,

(4) Has a cut to the extent that the ply or belt material is exposed.

(b) Any tire on the front wheels of a bus, truck, or truck tractor shall have a tread groove pattern depth of at least 4/32 of an inch when measured at any point on a major tread groove. The measurements shall not be made where tie bars, humps, or fillets are located.

(c) Except as provided in paragraph (b) of this section, tires shall have a tread groove pattern depth of at least…

The section continues.

49 CFR 393.75, Tires. Read the full section on eCFR

Quoted verbatim from the Electronic Code of Federal Regulations. Nothing here is a paraphrase, and nothing here is legal advice on a citation.

Times recorded24,1365% as often as 393.9, the most cited
How common138thof the 200 most cited codes, out of 2,372 that exist
Regulation393.75Parts and accessories

How often this comes up

This violation was recorded 24,136 times across the roadside inspections in the FMCSA file, making it the 138th most frequently cited code. Whether a given instance puts a vehicle or driver out of service is decided at the roadside by the inspector, not by the code itself, so the same violation can end a trip or simply be noted.

It sits under 49 CFR Part 393, which covers parts and accessories. To see it in context, look up a carrier and read its inspection history: the same code appearing repeatedly is a different signal from a single occurrence.

Look up a carrier's inspection record

Other parts and accessories violations

Counts are from the FMCSA Inspections and Violations file via data.transportation.gov. This describes how the violation is recorded, and is not legal advice on a citation.