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9628501a

Texas Specification No. 962-85-01A
(Supersedes Texas Specification No. 962-85-01A,
Formerly Texas Specification No. 060-91-01)
Effective Date: March 5, 1990
Date of Last Revision: October 16, 1998
Specification for Retreading and Repairing of Truck, Grader, and other Off-the-Highway Tires
1. SCOPE: This specification establishes minimum requirements for the retreading and repairing of truck, grader, and other off-the-highway tires of the radial and bias design.

2. APPLICABLE SPECIFICATIONS AND STANDARDS: Reference to specifications, standards, test methods, and other documents shall be to the issues in effect on the date of the Invitation for Bids. Copies of the referenced documents may be obtained from the issuing organizations at the addresses shown. The following publications form a part of this specification to the extent specified herein:

2.1. Federal Documents: Superintendent of Documents, U. S. Government Printing Office, Washington, DC 20402:
2.1.1. Federal Specification No. ZZ-T-441F -- Tires, Pneumatic: Retread and Repair.
3. DEFINITIONS: Terminology used in this specification is intended to be generic in nature and consistent with meanings that have been defined through general use and/or accepted trade practices. Where variant meanings may exist, the applicable interpretation shall be determined by the General Services Commission (GSC).
3.1. Retreading (Recapping): The method of replacement of worn rubber on a tire tread by the processes in the industry.

3.2. Full-Treading (Full Capping): The process whereby the worn tread rubber is removed by either rasping or buffing off the top of the tread and over the shoulder as far as the new rubber is to extend.

3.3. Top-Treading (Top Capping): The process whereby only the top of the old tread is removed and the new rubber is applied only to the top of the tread.

3.4. Undertread: The rubber between the base of the tread design and the buffed carcass (tire body).

3.5. Breaker: A strip of rubber and fabric under the tread. This serves as an extra protection to the carcass by distributing the road shock over a greater portion of the tire.

3.6. Tread Depth: The distance measured near the center line of the tire from the base of the tread design to the top of the tread.

3.7. Sectional or Reinforcement Repair: Repairs made with tire patches or repair unit to an injury which requires replacement of the cord body strength and when an injury is through one-fourth or more of the total number of tire plies. The outside of the tire shall be built up with tread repair and repair cushion stock.

3.8. Spot Repairs: Repairs made to injuries on the outside of the tire when not more than one-fourth of the total number of tire plies are injured. No inside fabric reinforcement is required. The outside of the tires shall be built up with tread-repair and repair-cushion stock.

3.9. Plug: A rubber plug type object with head and flexible stem which is used for closing small holes in tires.

3.10. Spongy Cure: Pinholes in the cured rubber is evidence of improper processing.

3.11. Soft Cure: Cured rubber which has not been properly cured during processing, which usually results in reduced mileage expectancy of the tire.

4. REQUIREMENTS: Products furnished under this specification shall meet or exceed the following requirements:
4.1. General Requirements:
4.1.1. All materials used shall be only of first line, first quality products equal to the first line products of the major tire manufacturers and recognized as such in the tire industry in the United States. The tread stock must meet or exceed the requirements of this specification. The rayon and nylon repair cord fabric, tread gum, vulcanizing cement, rubber solvent, and other materials used shall likewise meet or exceed the first line, first quality classifications of the major tire manufacturers.

4.1.2. Tires shall present a neat, well finished appearance inside and outside and shall be free of all imperfections and/or defects which might affect appearance, normal life, or serviceability.

4.1.3. Workmanship: The finished product shall show no corrugations or wrinkles, and shall show no bumpy spots indicating the presence of foreign matter in the repair materials and/or poor quality workmanship.

Repair or retreaded tires shall show no evidence of the following discrepancies:

4.1.3.1. Cupping or dimpling of fabric.

4.1.3.2. Splitting or separating of the plug from the basic tire.

4.1.3.3. Bulging of the plug.

4.1.3.4. Cracking in the tread grooves.

4.1.3.5. Separation or loosing o edge of tread over one-fourth inch (1/4") on fully recapped and/or top capped retreads.

4.1.3.6. Any other evidence of failure due to faulty materials or workmanship.

4.1.3.7. Retreaded or repaired tires shall be free from further evidence of inferior workmanship as follows:

4.1.3.7.1. Soft cure.

4.1.3.7.2. Spongy cure, i.e., full of pinholes.

4.1.3.7.3. Ply separations.

4.1.3.7.4. No bonding or adhesion of built-in sections or ready made patches.

4.1.3.7.5. Tread separations during curing.

4.1.3.7.6. Nail holes and glass cuts not properly plugged or repaired.

4.1.3.7.7. Sidewall cuts not spotted or repaired.

4.1.3.7.8. Broken or loose band-ply cord.

4.1.3.7.9. Lugs not properly filled out.

4.1.3.7.10. Excessively buckled repaired section.

4.1.3.7.11. Repairable, damaged, or chafed beads.

4.1.3.7.12. Off-center treads.

4.1.3.7.13. Buckled or creased band plies.

4.1.3.7.14. Cross-sectional distortion.

4.1.3.7.15. Mold vents, rinds and overflow improperly trimmed.

4.1.3.7.16. Repairs made so close together that patches overlap.

4.1.3.7.17. Repairs not regrooved, buffed, or cured to conform to design of tire.

4.1.3.7.18. Necessary identification marks obliterated by buffing (must be replaced).

4.1.3.7.19. Lack of layer of gum designed for repair of tubeless tires, extending over back of patch to insure continuity of sealing liner.

4.1.3.7.20. Cracked inner liners or open ply splices not properly repaired.

4.1.3.7.21. Buffing marks.

4.1.3.7.22. Irregular tread of shoulder patterns due to use of cracked, damaged or repaired matrices.

4.1.3.7.23. "Full-venting" of tubeless tires that penetrate the sealing liner and renders the tires unsuitable for use as tubeless.

4.1.4. Detail Requirements: The requirements pertaining to the recapping, conditions, repair limitations and tread rubber depths shall be as specified below:
4.1.4.1. Full Recapping: Full recapping shall be essentially the same width as a full tread (extending over the shoulders). All grader tires must be fully recapped and all other tires having radial cracks must also have full recaps.

4.1.4.2. Top Capping: Top capping shall extend only across the tread area. The breaker shall not be exposed excessively on buffing. If breaker is exposed, it shall be covered with a minimum of 1/32 inch of cushion rubber before the tread is applied. Top caps shall not be applied to tires having mud and snow, or cross country tread designs, whether directional or non-directional type.

4.1.4.3. Acceptance of Cord Bodies: Acceptance of the cord bodies for processing is the sole responsibility of the Department of Corrections and all tires that fail from tread or ply separations shall be subject to an adjustment in accordance with the "warranty" required by this specification. For exemptions pertaining to the Highway Department, see note listed under Paragraph 4.1.4.8.

4.1.4.4. Beyond Repair and Mold Blown Tires: No charges are to be made to State agencies for "beyond repair" or "mold blown" tires, or for the inspection thereof. All such tires, which belong to the Texas Highway Department, shall be retained at the Texas Department of Corrections Tire Retread Plant (Darrington Unit) pending sale by the Highway Department. Other State agencies must indicate on their order if these tires are to be returned. Cost of return freight will be the responsibility of the agency.

4.1.4.5. Tread Types: All recapping shall be done by the Pre-cured Retreading method, which is a process of bonding a pre-cured tread to a prepared tire casing, using a vulcanizable cushion as a means of adhering the tread to the prepared casing. Only grader tires will be done by the conventional full-cap method.

4.1.4.6. Filled-in Injuries: All filled-in injuries of 3/8 inch in depth or greater must be pre-cured in a sectional mold before recapping of tire. Fill-in injuries of less than 3/8 inch may be cured with the recap.

4.1.4.7. Under-tread Repairs: Under-tread reinforcement, sectional or spot repairs, which will not be visible after the completed processing of the tire and for which a charge will be made, shall not be made or skived out until inspected and approved by an authorized representative of the State.

4.1.4.8. Repair Limitations: The following repair limitations are effective for all tires processed in accordance with this specification:

4.1.4.8.1. Light Commercial Tires:
4.1.4.8.1.1. Light commercial tires requiring more than one section and one spot repair shall not be processed for retreading.
4.1.4.8.2. Truck Tires:
4.1.4.8.2.1. Truck tires requiring more than one section, at one time, shall not be repaired.

4.1.4.8.2.2. Not more than two spot repairs shall be made to recappable cord bodies.

4.1.4.8.2.3. A maximum of one section and two spot repairs shall be permissible on truck tires of the sizes 7.50 x 20 and larger, provided they show less than 75% tread wear.

4.1.4.8.2.4. A maximum of one section and one spot repair shall be permissible on truck tires showing 75% or more tread wear.

4.1.4.8.3 Off-the-Highway Tires:
4.1.4.8.3.1. The decision of whether a grader tire carcass is suitable for retreading and how may spot and/or sections repairs are allowed will be made by the manger of the Texas Department of Corrections Retread Plant. His decision will be based on overall quality of the carcass, number of repairs, type of repairs, and size of repairs.

Note: For tires belonging to the Highway Department, the repair limitations listed above and the acceptance of cord bodies may be exceeded upon agreement between the Highway Department and the manager of the Department of Corrections Retread Plat, provided the warranty conditions specified in Paragraph 9., will remain in effect.

4.1.4.9. Allowable Tire Repair: The maximum allowable tire repair shall not exceed one-half of the tire cross section and shall be measured at the largest ply opining in the skived area.

4.1.4.10. Tread Rubber Depth: The minimum tread rubber depths shall be as specified in Table No. One.

In addition, when cord repairs are required, reinforced patches of the proper material shall be used. The workmanship shall, in all respects, conform to the best commercial practice in the tire industry.

4.2. Sizes and Tread Minimums: The size and tread minimum shall be as shown in Table No. One.
TABLE NO. ONE Tire Sizes and Tread Rubber Depth Minimums
Truck Tire Sizes Tread Rubber Depth, Minimum Grader and Other Tire Sizes Tread Rubber Depth, Minimum
6.00 x 16 thru

7.00 x 16-7-17.5

14/32 7.50 x 20

8.25 x 20

18/32

28/32

7.50 x 15-8-17.5 thru

7.50 x 20-8-22.5

16/32 12.00 x 24 Grader

13.00 x 24 Grader

28/32

28/32

8.25 x 20-9-22.5 thru

11.00 x 20-12.22.5

16/32 14.00 x 24 30/32

5. TESTING: Testing shall be done by, or at the direction of, the Commission and/or the receiving State agency. Tests shall be performed on products from shipments to ordering agencies. In the event products tested fail to meet or exceed all conditions and requirements of this specification, the cost of the samples used and the cost of testing shall be borne by the supplier.

6. SAMPLES: Unless otherwise specified in the Invitation for Bids, no prepurchase samples shall be required. Samples tested shall be obtained from products supplied on regular orders.

7. INSPECTION: Products furnished under this specifications shall be inspected by, or at the direction of the Commission and/or the ordering State agency either at the destination or place of manufacture.

8. WARRANTY: All tires repaired or recapped under this specification shall carry a guarantee against defects in materials and workmanship. Adjustments shall be based upon the percentage of tread wear, regardless of age or mileage. Failures due to tread separations shall be adjusted by the processor as stated above, and in Paragraph 4.1.4.3.. Failures due to ply separation in the cord body of the tire shall be adjusted by the processor during the first 2/32 inch of the tread wear (See Paragraph 4.1.3.7.3.). Road hazard injuries, "run" flats and bead failures shall be the responsibility of the purchaser.

9. PACKING and/or PACKAGING: Packaging for shipment shall be in accordance with the manufacturer's standard practice and in a manner readily accepted by common carrier engaged in interstate commerce. Within the shipping carton, units shall be packed in a manner designed to minimize damage during shipment due to rough or improper handling.

10. MARKING and/or LABELING:

10.1. Marking: Each shipping container shall be clearly marked with:
10.1.1. Name of Contents.

10.1.2. Quantity ordered.

10.1.3. Name and address of the manufacturer.

The container or shipping documents shall include:

10.1.4. Order number or contract number.

10.1.5. Name and address or ordering agency.

10.1.6. Agency requisition number.

11. COMPLIANCE: In order for consideration to be given to the bid on an item under this specification, the bidder must comply with the following conditions:
11.1. Equipment Identification: The make, model, number, name of manufacturer, brand or trade name, etc., as applicable, of the item which the vendor proposed to furnish must be stated as part of the bid.

11.2. Exceptions: Notwithstanding the above, any exception taken by the bidder to the requirements and conditions of this specification must be stated and described in detail as a part of the bid. If no exceptions or deviations are identified in this manner, the items must be furnished exactly as described herein.

11.3. Proof: The bidder shall bear the burden of proof of compliance with this specification.

12. ORDERING DATA: When ordering products conforming to this specification, the requisitioning agency shall specify the following:
12.1. The number of this specification (962-85-01A).

12.2. The quantity, ply, and the types and sizes of the tires to be processed.

12.3. Texas Highway Department tires for processing shall be marked to identify the Highway District number and the location of the major warehouse. Other State agencies and school districts shall identify their tires my making their name on the inside of the tire carcass using a yellow rubber marking crayon.

12.4. Agencies other than the Highway Department must specify if "beyond repair" and "mold blown" tires are to be returned. (See Paragraph 4.4.4.4.).

13. AVAILABILITY OF SPECIFICATIONS: Copies of this specification may be obtained by calling or writing:

Bid Services
Texas Procurement and Support Services
P.O.Box 13186
Austin, TX 78711-3047
(512) 463-3416

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