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The information on this page is intended to provide an overview or generalization of casing grades and when a casing can and can not be recapped. The grading is based on Japanese Radial Casings.
Casing has never been retreaded (Virgin)
- No cuts or breaks No repairs or impact breaks - No exposed steel
- No existing repairs
- Sidewalls are in good condition
- No weather cracking
- No distortion of tubeless bead surfaces
- Not regrooved
Same as Grade A with exceptions of:
- Minor cuts and chips with some exposed steel in the tread area
- Maximum of two nail holes in tread area only
- Must be 1 1/2 inches in from the tread edge with maximum diameter of 3/8 inch
Previously treaded once in full, in top tread, or in bead to bead
- Maximum two nail holes in tread area only
- Must be 1 1/2 inches in from tread
- All other conditions are same as Grade A
These are the major inspection points to determining if a casing is a good candidate
- Initial inspection of the tire for side wall damage and checking for separation in belts
- A non destructive inspection checking for nail holes or improper repairs
- Checking for casing separation normally caused by over or under inflation of the tire
- Buffing off all of the remaining tread face
- Digging or cutting out imbedded objects such as nails or rocks known as Skiving
- Sealing the buffed and skived tire
- Inside patching any holes from the removed (skived) objects
- Filling the skived out hole with partially cured rubber (as needed)
