Definition
A protective rubber-coated fabric strip applied around the bead area of an aircraft tire that contacts the wheel rim. It shields the bead and tire body from wear, heat, and abrasion caused by the rim during installation, inflation, and flight loads.
Plain English
A tough rubber-and-fabric layer on the inner edge of an aircraft tire that protects the tire from being rubbed and damaged where it sits against the metal wheel.
Context Anchor
Seen in aircraft tire construction, tire inspection, and maintenance discussions about the area where the tire fits onto the wheel.
Derivation
From the verb 'chafe,' meaning to wear away or irritate by rubbing. The chafer is named for the job it does — it takes the chafing so the tire structure doesn't have to.
Why Pilots Care
Prevents early failure of tires, hoses, and control cables, reducing risk of in-flight issues and costly unscheduled repairs.
Intuition Check
Do not read chafer as the damage itself. A chafer is the protective part that helps prevent rubbing damage.
Example Sentence 1
During the tire inspection, the mechanic checked the chafer for signs of wear where the tire seats against the wheel rim.
Example Sentence 2
During the inspection the mechanic checked the chafer strips along the brake lines for signs of abrasion.