Tire retreading is an established industry that began in the early 1900s and grew steadily. Today, there are approximately 850 retread plants throughout North America. These plants vary in size, from small operations producing 20 retreaded tires per day to the very large plants processing 1,000 or more retreads per day. Additionally, there are plants that retread only specialized tires, such as those for off-the-road, farm and construction equipment. Altogether, these plants retread millions of tires a year, using millions of pounds of synthetic and natural rubber.
Grade A Radial Casings
- Virgin casings have never been retreaded
- No cuts or breaks
- Sidewalls are in good condition
- No existing repairs
- No distortion of tubeless bead surfaces
- No weather cracking
- No repairs or impact breaks
- No exposed steel
- Not regrooved
Grade B Radial Casings
All of the Grade A casing specifications with the addition of:
- Small percentage of tires may have maximum of two nail holes in tread area only
- Date of manufacture (DOT number) indicates tire to be between five and seven years old
- Minor cuts and chips (but no exposed steel in the tread area to avoid rust developing)
- Must be 1.5 inches in from the tread edge with maximum diameter of 3/8"
Grade C Radial Casings
- Previously retreaded once in full or top tread or bead-to-bead, with a maximum of two nail holes in tread area only. Holes must be at least 1.5 inches in from tire edge. All other conditions are the same as Grade A. DOT date code must not be any older than 7 years.
- No impact breaks or run flat conditions.
- Thread - No exposed steel. Must have remaining tread measuring a minimum of 1/32" evenly over all tread surfaces. Not regrooved.
- Sidewall - Sidewalls must be in good condition, with no visible oxidation, damage or bulges. No oil or petroleum damage or discoloration.
- Bead - Tubeless bead surfaces must not have any damage or distortion.