Retreading

Retreading is the process of restoring a worn tire by replacing or rebuilding its tread while preserving the tire’s original casing. It is commonly used for commercial vehicle tires and fleets that require high mileage and lower operating costs. A retreaded tire can provide a similar performance level to a new tire when the casing is in good condition.

The retreading process starts with a thorough inspection of the tire casing to assess structural integrity and repair any bruises, cracks, or other defects. If the casing passes, the worn tread is removed and the casing is prepared for retreading. There are two main retreading methods. In precure (PCR) retreading, a pre-cured tread band is applied to the buffed casing with bonding cement and then cured in a vulcanization chamber to form the finished tread. In full-cure, or mold-cure, uncured tread rubber is built onto the casing and cured in a mold to create the tread pattern. Some systems also use a cushion gum layer to improve bonding and ride characteristics. After curing, the tire undergoes final inspection and testing.

Casing suitability is a key factor; not all tires are retreadable, and certain defects disqualify a tire from retreading. Retreading is most common for trucks, buses, and aviation ground-support tires, but is also used for some passenger and specialty tires. Standards and certifications from national authorities and industry bodies govern retread quality and safety to ensure reliable performance.

Environmentally, retreading reduces waste and material extraction, lowers cost per mile, and conserves energy, contributing to more sustainable tire use without sacrificing safety when performed to prescribed guidelines.