Glossary

Zipper failure

Last reviewed: 2026-05-20

A sudden lateral sidewall separation that occurs when a tubeless tire run severely underinflated or flat is reinflated. The internal structure may have separated without visible exterior signs, then releases rapidly when pressure is applied.

Use an inflation cage and follow OSHA-required procedures (29 CFR 1910.177) when reinflating any tire that may have been run flat or severely low.

Real-World Use

A shop technician reinflating a tire that arrived completely flat places it in a restraining cage per OSHA requirements, knowing that zipper failure risk is elevated whenever prior underinflation history is unknown.

Reference Sources

Sources used for context and verification of regulatory thresholds, inspection criteria, and compliance references on this page.

Gov 29 CFR 1910.177 - Servicing multi-piece and single piece rim wheels (Electronic Code of Federal Regulations, reviewed 2026-05-20)

What to Pair It With

Read this term with the full tire sidewall, vehicle rating information, manufacturer documentation, and the actual condition of the tire.

This site is for general information only. It does not replace professional tire service, DOT compliance advice, tire manufacturer instructions, vehicle manufacturer recommendations, or fleet policy.