Application Charts
Tractor Radial Patches

HOW TO USE THESE CHARTS. Please note that these charts are only a suggestion and local driving conditions, etc. should be considered when making the proper selection of Chemco radial patches.

Determine the tire cross section corresponding to the injured tire. This will determine the appropriate patch selection. The chart then provides information outlining the maximum dimensions of the repairable injury. The maximum length of a repair is determined by its corresponding width. As the width of the injury increases, the maximum length decreases. The chart also indicates the minimum distance a crown patch must extend beyond the injury, or a sidewall patch must extend beyond the flex point of the sidewall onto the tire crown. Please refer to the diagrams below.

 

Crown Repairs

Sidewall Repairs

Note: The crown patch must not extend beyond the belt edge into the sidewall flex region. However, it must extend beyond the edge of the injury by the minimum distance (M). If not, a sidewall patch must be used.
Note: The sidewall patch should extend from the bead to the center of the crown area. It is recommended that the patch be placed to end 3/8" to 1 ½” (9.5mm to 38mm) above the bead. The sidewall patch must extend beyond the edge of the injury by the minimum distance (M). On shoulder or lower sidewall repairs, the patch must be placed to meet the minimum distance (M). The maximum length of the repair is determined by its corresponding width. As the width of an injury increases, the maximum length decreases (please refer to the accompanying size charts).

Crown Repairs
 
Crown Injury          Tire Cross Section
Diameter c 8-11 12-15
Inch (mm) 8.3-12.4 13.6-30.5
3/8" (10) SFUX43 SFUX65
3/4" (20) SFUX65 SFUX76
11/2" (38) SFUX76 SFUX86
21/2 (65) SFUX86 SFUX106
31/2" (90) SFUX106 SFUX108
41/2" (114)   SFUX1210
Min. Dist. M Inch (mm)  3" (75) 4" (100)
 
Sidewall Repairs
 

Shoulder Injury

Sidewall Injury

Tire Cross Section
Diameter c W L  8-11 12-15
Inch (mm) Inch (mm) Inch (mm) 8.3-12.4 13.6-30.5
  3/8" (10) 11/2" (40) SFUX74 SFUX84
  3/8" (10) 4" (100) SFUS84 SFUX94
  3/8" 51/2" (140) SFUX94 SFUX105
3/8" (10)     SFUX105 SFUX105
  3/4" (20) 3" (75) SFUS105 SFUX125
  3/4" (20) 41/2" (114) SFUX125 SFUX125
3/4" (20)     SFUX125 SFUX125
  1" (25) 21/2" (65) SFUX125 SFUX155
  1" (25)  3" (75) SFUX155 SFUX159
  1" (25)  4" (100) SFUX159 SFUX159
1" (25)     SFUX155 SFUX155
  11/2" (40) 4" (100) SFUX175 SFUX175
11/2" (38)     SFUX175 SFUX175
  2" (50) 31/4" (80) SFUX175 SFUX188
  2" (50) 8" (200) SFUX188 SFUX188
  21/2" (65) 3" (75) SFUX188 SFUX207
  21/2" (65) 4" (100) SFUX207 SFUX207
21/2" (65)     SFUX207 SFUX238
  3" (75) 41/2" (114) SFUX238 SFUX238
  3" (75) 61/2" (165) SFUX238 SFUX238
  31/2" (90) 5" (125) SFUX238 SFUX238
  31/2" (90) 51/2" (140) SFUX269 SFUX269
31/2" (90)     SFUX238 SFUX238
  4" (100) 5" (125) SFUX269 SFUX269
  4" (10) 61/2" (165) SFUX3010 SFUX3411
41/2" (114)     SFUX269 SFUX269
  5" (125) 4" (100) SFUX3411 SFUX3411
Minimum Distance M  Inch (mm)   3 (75) 4 (100)
No Repair Area  T- B   Inch (mm)   3 (75) 3 (75)
 
     
 
W = Width of injury across radial cables
c = Maximum Diameter of injury in the belt plies or in shoulder
TB = Non repairable area
M = Minimum distance of injury edge to patch edge
How to use above charts 
This information is to be read with the diagram on page 7 of Superflex catalogue.
1. Please note that the above charts are only a suggestion and local driving conditions, etc should be considered when making the proper selection of Chemco radial patches. Determine the cross section of the injured tire in order to read off the patch selection. The length of a repair is determined by its corresponding width. As the width increases, the length decreases. This chart also provides information outlining the maximum dimensions of a repairable injury.
2. In a conventional sectional repair, select a repair unit depending on whether the injury is on crown or 
sidewall for each tire cross section. Patches must be positioned to end in the non-flexing areas. Crown sidewall for each tire cross section. Patches must be positioned to end in the non-flexing areas. Crown beyond the edge of the injury by the minimum distance M. If this is not possible, a sidewall patch 
patches must not extend beyond the belt edge into the sidewall flex region. However, it must extend 
beyond the edge of the injury by the minimum distance M. If this is not possible, a sidewall patch must be used. The sidewall patch should extend from the bead to the center of the crown area. It is recommended that the patch be placed to end 3/8" to 11/2" (10mm to 38mm) above the bead. The sidewall patch must extend beyond the edge of the injury by minimum distance M. In a Shoulder or lower sidewall repair, the patch must be placed to meet the minimum distance M.
3. Radial patches are designated according to Length and Width dimensions. For example SFUX 269 means the patch length is 26 inch and the width is 9 inch. Thus:
Patch Designation Dimensions L X W
            SFUX……     Inch     mm
108   10" X 8" 250 X 200
1210   12" X 10" 300 X 250
207   20" x 7" 508 X 178
238   23" x 8" 584 X 200
269   26" x 9" 660 X 225
 
 
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