With proper maintenance and care, retreaded tyres will provide the same amount of service as comparable new tyres. Retreads tread life varies from the same as a comparable new tyre to 75% - 85% of a new tyre. The variables here, relative to a comparable new tyre are, 1. Retreads often start with less tread depth, 2. Due to casing conditions, the retread footprint may be smaller/narrower then the new tyre, 3. Trailer tyres are removed from service for reasons other then wear out over 80% of the time, especially with in-line haul service.