Grade A

• (a) Casings of this grade have not been previously retreaded, remolded or repaired with a section
• (b) Casings of this grade have at least 1/32″ of the original groove tread depth remaining
• (c) Casings of this grade have not been re-grooved
• (d) Casings of this grade do not contain the following
  • Significant weather checking
  • Damage requiring a major section repair
  • More than 2 nail holes in nylon tire casing or more than 1 nail hole in radial tire casing
  • Penetrating injury 3mm or deeper
  • Obvious use in deflated condition
  • Tread skid
  • Deep tread cuts by sharp rocks, glass, metal, etc. that damaged nylon or steel cords
  • Excessive sidewall abrasion or damage
  • Sidewall ripples or bulges
  • Bead damage or deformity
  • Circumferential cracking around the bead area
  • Separation

Grade B

• Casings of this grade may contain up to 2 of the conditions mentioned below:
  • Casing with no remaining tread depth
  • Previously repaired nail holes
  • Deep tread cuts within the allowable limit
  • Section repair required
  • Maximum 4 nail holes but not grouped together in nylon tire casing and maximum 2 nail holes in radial tire casing
  • Penetrating injury less than 6mm deep
  • Minor damage on sidewall and/or shoulder (rubber only) within the allowable limit, but no damage to fabric or steel cords
  • Damage to rubber in bead area, but no damage to bead wire itself

Note: All other conditions are the same as in the Grade A casing

Grade R1

• Casings of this grade (so-called once recapped casings) have previously been fully or partially recapped and may contain some of the following:
  • Previously repaired damage within the allowable limit
  • Tread cuts in rubber area within the allowable limit
  • Skid within the allowable limit, but underlying fabric and steel are not exposed
  • Sidewall damage in rubber area only

Note: All other conditions are the same as in the Grade A casing