Index for each Part of Tires

Index for each Part of Tires 1. Tread NORMAL TREAD WEAR...57 UNEVEN TREAD WEAR (SHOULDER)... 58 UNEVEN TREAD WEAR (CENTER)... 59 IRREGULAR WEAR: ABRASION... 60 SPOT WEAR...61 TREAD RUBBER REVERSION...62 TREAD SEPARATION...63 CUTS...64 RIB UNDERCUTTING...65 CHEVRON CUTTING...66 PEELED RIB...67 BULGE ON THE CROWN SURFACE (DEFLATED TIRE)... 68 GROOVE CRACKING...69 CONTAMINATION...70 OPEN TREAD-SPLICE...71 CHIPPING AND CHUNKING...72 RIB TEARING...73 CORD EXPOSURE IN TREAD GROOVE...74 IMPACT BREAK...75 SKID BURST...76 BULGE/BLISTER...77 2. Sidewall 3. Bead SIDEWALL CUTS...78 SIDEWALL CRACKING Circumferential cracks...79 WEATHERING & RADIAL CRACKING... 80 CASING BREAK UP (CBU)...81 INNERLINER WRINKLING...82 OVERHEATING FROM EXCESSIVE BRAKING...83 CHAFER DAMAGE...84 HEAT BURST...85 56

Tread NORMAL TREAD WEAR PHENOMENON Rubber is worn out evenly across the tire tread. Even tread wear indicates that tire pressure has been maintained at the correct inflation level during service. Tire should be removed at the following condition whichever comes first across the tread; i) When the wear level reaches the bottom of any groove at one point or up to 1/8 of the circumference ii) The reinforcing fabric (bias) or aramid cord protector (radial) is exposed. If it is necessary to continue the tire in service beyond the limit i), the tire should be removed either at the next maintenance base or the limit ii) happens, whichever occurs first. Important Notice: Specific removal criteria shall be defined by instruction of airframe manufacturers, such as AMM. Such document takes precedence over this manual. 57

UNEVEN TREAD WEAR (SHOULDER) PHENOMENON Rubber wearing is much progressed at shoulder area of tread. Underinflation will lead to excessive tread shoulder wear. It will also lead to high tire deflection and subsequent heat build-up which may result in tire damage. If the tire wear limit has been or soon will be reached, remove the tire. If the wear limit has not been reached, check the pressure and adjust it to the recommended value. If shoulder wear is more pronounced on one side, this type of wear could result from axle flexing. Tire can be kept in service until normal wear removal criteria is reached. 58

UNEVEN TREAD WEAR (CENTER) PHENOMENON Rubber wearing is much progressed at center area of tread. Overinflation accelerates center tread wear, reduces tire traction and makes the tread more susceptible to cutting by foreign objects. If the tire wear limit has been reached or soon will be reached, remove the tire. If the wear limit has not been reached, check tire pressure and adjust in accordance with maintenance manual standards. 59

IRREGULAR WEAR: ABRASION PHENOMENON Tread surface becomes quite rough, or slightly melted. Side Force Refers to abrasive wearing of the tread caused by sudden, strong side forces. If the reinforcing fabric (bias) or aramid cord protector (radial) is exposed, remove the tire. 60

SPOT WEAR PHENOMENON Quite deep rubber wearing happens at singular location of tire. Skid burns result from brake malfunctions or locking of the wheel, most often during landing. If the spot wear reaches the reinforcing fabric (bias) or aramid cord protector (radial), remove the tire from the aircraft. If the spot wear does not reach the reinforcing fabric (bias) or aramid cord protector (radial), if there is sufficient groove depth in the whole spot wear area, if there is not incipient separation and if vibration is not detected while rolling, leave the tire on the aircraft. 61

TREAD RUBBER REVERSION PHENOMENON A patch of tread rubber is melted or scorched. An oval shaped burn on the tread most often is caused by hydroplaning on wet or frozen runways during landing. If the tread rubber reversion reaches the reinforcing fabric (bias) or aramid cord protector (radial), remove the tire from the aircraft. If the tread rubber reversion does not reach the reinforcing fabric (bias) or aramid cord protector (radial), if there is sufficient groove depth in the whole tread rubber reversion area, if there is not incipient separation and if vibration is not detected while rolling, leave the tire on the aircraft. 62

TREAD SEPARATION PHENOMENON Internal separation happens between tire components at tread area. Part of tread rubber and / or fabrics are lost and internal construction is exposed. Separation of the tread or fabric is caused by overloading, cuts, abnormal heat built-up, etc. A tire with tread or fabric separation must be removed immediately and be checked by the tire manufacturer. If tread separation is serious, part of most of the tread (often including the reinforcing fabric in bias tires) may peel off, which in turn may lead to damage to the aircraft. Therefore, remove the tire immediately. Early signs of tread separation can manifest themselves in the form of a tread bulge, local uneven wear (depression) or a local tread/sidewall rubber split. Remove the tire immediately. If the tire is still inflated after aircraft is at parking position, record the pressure after it has cooled down (allow 3 hours). Then deflate the tire before removing the wheel assembly. 63

CUTS Cuts are most often caused by foreign objects present on runways or taxiways. If cuts reach the carcass ply or belt cut limits, the tire must be removed from the aircraft. If the Cut Depth Limit (CL) has not been reached, but the cut length exceeds the Length Limit (LL), remove the tire from the aircraft. * Tires with cuts reaching more than 40% of the actual number of plies, or 40% of the belts for radial tires, must be scrapped. *WARNING Do not probe cuts or embedded foreign objects while tire is inflated. Note: CL designates the depth from the groove bottom to the outer carcass ply (bias) or outer belt (radial). Neither the reinforcing fabric (bias) nor aramid cord protector (radial) shall be confused with the belt or carcass plies. Refer to the CL and LL limits table p87. 64

RIB UNDERCUTTING PHENOMENON Rubber cracks happen at the wall of the tread-rib in tread grooves. The cracks spread underneath the ribs. Tread Rib undercutting An extension of groove cracking progressing under a tread rib which can lead to tread chunking, peeled rib or thrown tread. The tire shall be removed from aircraft as soon as the crack extends under the rib. 65

CHEVRON CUTTING PHENOMENON Superficial rubber cuts happen on the tread. The cuts are shaped as v and extend across the tread. This phenomenon usually occurs on grooved runways at aircraft touches down, the tires are rotated rapidly and damaged by the runway groove edges. If the reinforcing fabric (bias) or aramid cord protector (radial) is exposed and damaged, remove the tire from the aircraft. If the chevron cuts extend across a center rib from groove to groove, remove such tire from the aircraft. If the cut protector is exposed over 5 cm 2 due to tread chunking, remove such tire from the aircraft. If more than one chevron cut reaches to the cut protector, remove such tire from the aircraft. 66

PEELED RIB This condition occurs when a tread rib partially or totally peels off in a circumferential direction. Usually beginning with a cut in the tread, it results in a circumferential delaminaiton of a tread rib away from the tire carcass. Remove the tire from the aircraft. In the case of transverse cuts on the tread, remove the tire if the cut is deeper than the tread groove or extends across a rib from groove to groove. 67

BULGE ON THE CROWN SUR- FACE (DEFLATED TIRE) Severe operating conditions may cause local reinforcing fabric nylon cord to rupture. When such tires are deflated, small bulges (i.e. surface swelling) may appear on the tread surface. This phenomenon is due to the stretching of rubber around the ruptures in the reinforcing fabric and does not pose any problems once the tire is retreaded as the reinforcing fabric is replaced. However, bulges and blisters appearing while the tire is inflated and in service indicate a separation or damaged tire. Mark the area and remove the tire immediately. 68

GROOVE CRACKING Groove cracking may result from environmental aggression of the rubber (ozone attack for example) or from an excessive mechanical solicitation, insufficient inflation of the tire. These cracks occur at the bottom of the tread groove pattern. The tire shall be removed from the aircraft if: the groove cracking exposes the reinforcing fabric (bias) or aramid cord protector (radial). the groove cracking is under cutting the adjacent rib. Tires with minor groove cracking may continue in service. 69

CONTAMINATION Brake oil, fuel, tar oil, solvent, chemicals and hydrocarbons deteriorate tire rubber. Clean the tire quickly with commercially available denatured alcohol to remove such substances, then wash with soap and water. 70

OPEN TREAD-SPLICE Denotes a tire defect where the tread joint or splice separates in a radial direction during operation. Tires having this defect must be removed from the aircraft. 71

CHIPPING AND CHUNKING PHENOMENON Relatively smaller gauges occur on tread surface. Small amount of tread rubber is missing. Quite strong Lateral-Force is applied on the tread surface during operation. Typical maneuver result in this phenomenon is: cross-wind landing, high speed cornering, and tight-turning. Remove tire when cords are exposed in the spot. 72

RIB TEARING Rib tearing occurs when a tire is subjected to an extraordinary side force during landing or taxiing. If cords are exposed, remove the tire from the aircraft. 73

CORD EXPOSURE IN TREAD GROOVE When rubber gauge in the tread groove is thin, the reinforcing fabric pattern may become visible at the base of the groove. Tires with this condition are airworthy. However, should the reinforcing fabric (bias) or aramid cord protector (radial) become exposed or frayed during service as a result of cracking or cuts, the tire must be removed. 74

IMPACT BREAK For bias tires, FOD and shock bursts are typically identified by diamond or X-shaped ruptures of the tread and carcass sustained by rolling over foreign objects. The photograph shows a damaged tire restored to its original shape and the cause of the failure being investigated. Remove the tire from the aircraft. Should FOD burst occur, completely collect scattered fragments of the tire to allow for a thorough investigation. 75

SKID BURST Skid bursts result from brake malfunctions or locking of the wheel, most often during landing. Without tire rotation, the rubber and carcass plies are quickly worn through leading to the bursting of the tire. 76

BULGE/BLISTER Bulges and blisters indicate a separation or damaged tire. Mark the area and remove the tire immediately from the aircraft. 77

Sidewall SIDEWALL CUTS Sidewall cuts are often caused by foreign objects. If sidewall cords are exposed or damaged, remove the tire from the aircraft. 78

SIDEWALL CRACKING Circumferential cracks Circumferential cracks are caused by load shear and stress combined with low tire inflation pressure. If fabric is exposed, remove the tire. If the cut depth APPEARS to be greater than 2mm, tire removal is recommended. *WARNING Do not probe cut to measure cut depth. Judge visually only. 79

WEATHERING & RADIAL CRACKING Weathering and radial cracking occur when tires are exposed to ozone or to direct sunlight (ultraviolet rays) for extended periods of time, and are accelerated by insufficient tire inflation pressure. If cords are exposed, remove the tire and scrap. 80

CASING BREAK UP (CBU) These phenomena are caused by underinflation, by overinflation or by taxiing excessive distances. When swelling or bulges are detected at the lower sidewall, remove the tire and return to the retreader for inspection of fabric separation or CBU. 81

INNERLINER WRINKLING Wrinkling of the innerliner typically occurs due to over deflection of the tire. This type of damage can also indicate that the tire has experienced low inflation pressure conditions in service. * Tires with innerliner wrinkling should be scrapped together with the axle mate tire, since both tires have been subjected to overloading. 82

Bead OVERHEATING FROM EXCES- SIVE BRAKING Excessive braking or maladjusted brakes are liable to create high heat build-up, which may lead to melting of the rubber at the bead seat or toe/heel areas. Remove the tire after it cools. *Tires with signs of cord-melting due to overheating must be scrapped. 83

CHAFER DAMAGE If the tire is mounted incorrectly on the rim or is mounted using a wrong tool, the tire beads may be damaged. Improper inflation of the tire and oil seepage between the tire bead and wheel rim flange may also cause chafer damage. The damage shown on the right was caused by slippage between the tire and the rim. 84

HEAT BURST Abnormal heat generation may occur at the bead and shoulder areas. In the worst case, bursting may result. 85

Cut Depth and Length Limits Table (CL&LL) When examining cuts on the tire tread surface, refer to the following table to determine depth to the first carcass ply and the maximum cut limit. The cut depth values are measured from the bottom of the tread groove to the casing ply or belt ply. Do not confuse the reinforcing fabric (bias) or the aramid cord protector (radial) with the casing plies or belts. In the event that it is not possible to either make an informed judgment or take measurements, if the reinforcing fabric (bias) or aramid cord protector (radial) is visible, remove the tire and return the product to Bridgestone. First Ply (A) Maximum Cut Criteria (B) Groove Bottom Remaining Skid Depth (a) (c) (a) Cut Tread Cut Depth (c) Reinforced Fabric/ Aramid Cord Protector Carcass Ply/Belt Recommended Action Remove the tire if (c) - (a) > (A) Scrap the tire if (c) - (a) > (B) TYPE III & TYPE VII TIRES CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder 6.00-6 6 120 APS01055,-A 4 2.0 3.0 2.0 3.0 30 8.50-10 10 160 APS01110,-A 8 5.0 4.5 6.0 5.5 30 8.90-12.50 6 120 APS01156,-A 4 2.0 2.0 2.0 2.0 30 11.00-12 8 120 APS01147,-A 6 7.5 4.5 2.0 9.0 6.0 3.5 30 12.50-16 12 120 APS00170,-A,-B 10 5.0 4.5 5.0 8.0 6.5 7.0 35 12.50-16 12 160 APS01250,-A 10 5.0 4.5 5.0 7.5 6.5 7.0 35 2457.7 6 190 APS01144 6 4.0 5.0 5.0 6.0 30 2457.7 10 120 APS00330-A,-B 8 5.0 5.0 6.5 6.5 30 2457.7 10 160 APS01122,-A 8 4.5 4.5 5.5 6.0 30 2457.7 10 225 APS01142 6 4.0 4.0 5.0 5.0 30 2457.7 14 210 APS00358-A,-B 8 5.5 7.5 7.0 9.5 30 2457.7 14 190 APS01126,-A 8 3.5 6.0 5.0 8.0 30 2457.7 16 225 APS00362,-A,-B 10 6.0 7.0 9.0 10.5 30 24.558.5 10 210 APS01140,-A 8 6.0 5.0 8.0 7.0 30 2656.6 10 225 APS00278-B,-C 6 5.5 6.0 6.5 7.0 30 2656.6 10 225 APS01162,-A 6 5.5 6.5 7.0 8.0 30 2656.6 12 225 APS00281-A,-B 8 5.5 6.5 7.0 8.5 30 3058.8 16 225 APS01203 12 6.0 7.5 9.0 10.0 30 34511 22 225 APS00400-A,-B 16 6.0 9.0 12.5 11.0 14.0 18.0 30 36511 22 225 APS00413-E,-F 16 6.5 8.5 11.0 13.0 35 39513 14 180 APS01253,-A 8 5.0 8.0 12.0 7.0 9.5 14.5 35 39513 16 225 APS00419-A,-B 10 7.0 8.5 12.0 10.0 12.0 15.0 35 39513 22 190 APS01258,-A 16 5.0 7.5 9.0 11.5 35 39513 24 190 APS01471 16 5.0 7.5 9.0 11.5 35 39513 24 210 APS01472 16 5.0 7.5 9.0 11.5 35 40512 20 210 APS01259 14 7.0 8.0 11.0 11.5 40 40514 16 210 APS01267,-A 10 6.5 6.5 7.0 10.0 9.5 9.5 40 40514 22 225 APS00453-B,-C 14 6.0 7.0 10.0 10.0 10.0 14.0 40 40514 24 210 APS00478-F 16 7.0 7.5 7.5 11.5 12.0 12.0 40 40514 24 210 APS01294 12 5.5 7.0 8.5 9.5 40 40514 24 210 APS01294-A 12 4.5 9.0 7.5 12.0 40 40514 24 225 APS00481-E 16 7.0 7.5 7.5 13.0 14.0 14.0 40 40514 24 225 APS01291 12 5.5 7.0 8.5 10.0 40 40514 24 225 APS01291-A,B 12 4.5 9.0 7.5 12.0 40 40514 28 225 APS00483-C,D 18 7.0 10.0 10.0 14.0 15.5 16.5 40 44516 30 225 APS00499-C,D 20 7.0 9.0 12.0 14.0 15.0 19.0 40 46516 28 225 APS00516-E 20 8.0 8.0 8.5 14.0 14.5 15.5 40 46516 28 225 APS01347 16 5.5 6.5 11.5 13.0 40 86

CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder 46516 28 225 APS01347-A 16 5.5 8.5 11.0 15.0 40 46516 30 225 APS00524-D,E 20 8.0 8.5 9.5 14.5 15.0 15.5 40 46516 30 225 APS01346 16 6.0 7.0 11.5 13.0 40 46516 30 225 APS01346-A,B 16 5.5 8.5 11.0 15.0 40 46516 32 225 APS00528-B 22-2BR 8.0 9.0 8.0 18.5 19.5 18.5 40 46516 32 225 APS01345 18-2BR 6.0 7.0 13.5 14.5 40 46516 32 225 APS01345-A 18-2BR 5.5 9.0 13.5 17.0 40 49517 28 210 APS00539-E 20 8.0 9.0 9.0 13.5 15.0 15.0 40 49517 28 210 APS01355 16 6.0 7.0 12.0 13.0 40 49517 28 210 APS01355-A 16 5.5 7.5 11.5 13.5 40 49517 30 210 APS00522-C 20 7.5 9.0 10.0 15.0 17.0 18.0 40 49517 30 210 APS01354 16 6.0 7.0 12.0 13.0 40 49517 30 210 APS01354-A 16 5.5 7.5 11.5 13.5 40 49517 30 225 APS00554-D 20 7.0 10.0 10.0 15.0 17.0 17.0 40 49517 30 225 APS01351 16 6.0 7.5 12.0 13.0 40 49517 30 225 APS01351-C,D 16 6.5 8.0 12.5 14.0 40 49517 30 225 APS01351-A 14 6.0 7.5 10.0 11.0 40 49517 32 225 APS00558-C 22 7.5 9.0 9.0 14.0 16.0 17.0 40 49517 32 225 APS01350 18 6.5 7.5 12.5 14.0 40 49517 32 225 APS01350-B,C 18 6.5 8.0 13.5 15.0 40 49517 32 235 APS01348 22 7.5 9.0 14.0 16.0 17.0 40 49517 32 235 APS01306 18 6.5 7.5 13.0 14.0 40 49517 32 235 APS01306-B,C 18 6.5 8.0 13.5 15.0 40 THREE PARTS TYPE TIRES CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder 17.556.25-6 8 190 APS01062 6 3.5 4.0 * * * 30 2457.25-12 10 210 APS01139 6 5.0 5.0 * * * 30 2859.00-12 8 190 APS01146 8 5.0 5.0 5.0 6.5 6.5 6.5 30 2757.75-15 10 225 APS01205-A,-B 8 6.0 6.0 8.0 8.0 30 2757.75-15 12 225 APS01207 10 6.0 6.0 9.0 9.0 30 32511.50-15 12 210 APS00569-C,-D 10 6.0 7.0 8.0 10.0 30 32511.50-15 12 225 APS01210,-A 10 6.0 7.0 8.0 10.0 30 34510.75-16 10 190 APS01228 8 6.0 7.0 7.0 8.0 30 34510.75-16 12 190 APS01229 8 6.0 6.5 7.5 8.0 30 37513.0-16 26 225 APS01241,-A 18 8.5 9.5 9.5 15.0 15.5 15.5 35 40515.5-16 26 235 APS00571,-B,-C 18 7.0 7.0 7.0 13.0 13.0 13.0 40 40515.5-16 28 235 APS00587,-A 18 6.5 6.5 6.5 13.0 13.0 13.0 40 40515.5-16 28 235 APS01458 12 5.0 5.0 8.5 9.0 40 40.5515.5-16 28 235 APS01301 14 5.0 4.5 9.5 9.0 40 41515.0-18 22 225 APS00576-C,-D 16 8.0 10.0 11.5 13.0 15.0 16.0 40 41515.0-18 24 225 APS00588,-A 18 8.0 11.0 12.0 15.0 18.0 19.0 40 44.5516.5-18 30 225 APS00574-A,-D 20 6.5 7.5 10.0 13.0 15.0 17.5 40 49518.0-22 30 225 APS06009 14 5.5 6.0 10.5 11.0 40 49519.0-20 32 235 APS00563-C 22-2BR 8.5 9.0 9.5 15.5 16.5 17.5 40 49519.0-20 32 235 APS01450 18 6.5 6.0 13.0 12.5 40 49519.0-20 32 235 APS01450-A,B 18 8.5 7.0 15.0 13.0 40 49519.0-20 34 235 APS00591-A 24-2BR 8.0 9.0 10.0 16.0 16.5 17.5 40 49519.0-20 34 235 APS01451 20-2BR 6.0 6.0 15.0 14.0 40 49519.0-20 34 235 APS01451-A 20-2BR 8.5 7.0 16.0 14.0 40 50520.0-20 32 225 APS00617-F 24 8.0 8.0 7.5 16.5 15.0 14.0 40 50520.0-20 32 225 APS006000 18 6.0 6.5 12.5 12.5 40 50520.0-20 34 225 APS00623-C 26 8.0 7.5 6.5 19.0 18.0 18.0 40 50520.0-20 34 225 APS06001 20 6.0 6.5 14.0 14.0 40 * : Not retreaded 87

CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder 50521.0-20 28 210 APS00625-C,-D 22 7.5 7.0 7.0 15.0 14.5 15.0 40 50521.0-20 30 210 APS00635-C 22 7.5 8.0 8.0 15.0 15.0 16.0 40 50521.0-20 30 210 APS06003 18 6.0 5.5 12.5 11.5 40 50521.0-20 30 225 APS01467-A 22 7.5 7.5 7.5 14.5 14.5 15.5 40 50521.0-20 30 225 APS06004 18 6.0 5.5 12.5 11.5 40 52520.5-20 36 225 APS00655-B,-C 26 8.0 9.0 10.0 17.0 19.0 20.0 40 52520.5-23 28 235 APS00700-E 22 7.5 8.0 8.0 14.5 15.5 16.5 40 52520.5-23 28 235 APS01486 18 5.5 5.5 13.0 12.5 40 52520.5-23 30 235 APS00754-C 24 8.0 8.0 16.0 16.5 40 52520.5-23 30 235 APS01501 20 5.5 5.5 14.0 13.5 40 54521.0-23 32 235 APS01508 14-3BR 5.5 5.5 13.5 13.5 40 H TYPE TIRES CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder H31513.0-12 20 225 APS01150,-A 12 5.0 7.0 8.0 9.5 30 H31513.0-12 20 235 APS01570 12 5.0 7.0 8.0 9.5 30 H37514.0-15 22 225 APS01214,-A 14 7.0 7.0 11.5 11.5 35 H37514.0-15 22 235 APS01225 14 7.0 7.0 11.5 11.5 35 H37514.0-15 24 225 APS01222 16 7.5 8.0 13.0 13.5 35 H37514.0-15 24 225 APS01226 16 7.5 8.0 13.0 13.5 35 H40514.0-19 20 225 APS01456 12 6.0 6.0 9.0 9.0 40 H40514.5-19 22 225 APS01330-A 16 8.0 8.0 8.5 13.5 14.0 14.5 40 H40514.5-19 22 225 APS01338 14 6.0 6.0 11.5 11.5 40 H40514.5-19 24 225 APS00598-B 18 8.0 8.0 8.0 15.5 15.5 15.5 40 H40514.5-19 24 225 APS01339 16 6.0 6.0 12.5 12.5 40 H40514.5-19 26 225 APS01337 16 6.0 6.0 12.5 12.5 40 H40514.5-19 26 235 APS04002 14 7.0 6.0 13.5 12.5 40 H42516.0-19 26 225 APS01325 18 6.0 6.0 12.5 12.5 40 H43.5516.0-21 24 225 APS06012 12-2BR 6.0 6.0 12.0 12.0 40 H43.5516.0-21 26 225 APS06013 12-2BR 6.0 6.0 12.0 12.0 40 H44.5516.5-20 24 225 APS00610-B 16 8.0 7.0 7.0 14.0 13.0 13.0 40 H44.5516.5-20 24 225 APS01387 14 6.0 7.0 11.0 11.0 40 H44.5516.5-20 26 225 APS00612-B 18 8.0 7.0 6.5 14.5 14.0 13.5 40 H44.5516.5-20 26 225 APS01505 14 6.0 6.0 11.0 11.0 40 H44.5516.5-20 28 225 APS01403A 20 8.0 7.5 7.5 15.0 14.5 14.5 40 H44.5516.5-20 28 225 APS01440 16 6.5 6.5 13.0 13.0 40 H44.5516.5-21 26 225 APS06008 14 7.0 7.0 12.0 12.0 40 H44.5516.5-21 28 225 APS06015 14-2BR 6.5 6.5 13.0 13.0 40 H44.5516.5-21 28 235 APS06017 14-2BR 6.5 6.5 13.0 13.0 40 H44.5516.5-21 28 235 APS06020 14-2BR 7.5 6.0 15.0 14.0 40 H44.5516.5-21 30 235 APS06030 16 7.5 6.0 15.0 14.0 40 H45517.0-20 26 225 APS01405-A 20 8.0 8.5 9.0 15.5 16.0 16.0 40 H45517.0-20 26 225 APS01404-A 22 8.0 8.5 9.0 15.5 17.0 17.0 40 H45517.0-20 26 225 APS01457 16 5.5 6.0 11.5 12.0 40 H46518.0-20 26 225 APS01410-B 20 7.0 8.0 8.0 15.0 16.0 15.5 40 H46518.0-20 26 225 APS06005 16 6.0 6.0 12.0 12.0 40 H46518.0-20 28 225 APS01412-A 24 7.0 8.5 8.5 16.0 16.0 16.0 40 H46518.0-20 28 225 APS06006 18 6.0 5.0 13.5 12.5 40 H46518.0-20 32 225 APS01441 24 7.5 8.0 7.5 16.0 16.5 16.5 40 H46518.0-20 32 225 APS06007 20 6.0 5.0 14.5 13.0 40 H46518.0-20 32 235 APS06010 20 6.0 5.0 14.5 13.0 40 H49519.0-22 24 225 APS01481 14 6.0 6.0 11.0 11.0 40 H49519.0-22 32 235 APS01480 24 6.0 6.0 * * 40 * : Not retreaded 88

CL: Cut Depth limit (mm) LL: Cut Length Limit (mm) Number of Removal Limit Rejection Limit Tire Size PR MPH Part Number Plies (B) Maximum Cut Criteria Removal Limit (A) To First Ply 40% of Total Plies (Tread) Center Second Shoulder Center Second Shoulder H49519.0-22 32 235 APS01482 18 6.5 6.0 14.0 13.0 40 H49519.0-22 32 235 APS01482-A 14-2BR 7.0 5.0 12.0 9.5 40 H49519.0-22 32 235 APS01482-B 18 7.5 7.0 15.0 14.0 40 H54521.0-24 36 235 APS01550-A 20 9.5 9.5 18.5 18.5 40 H54521.0-24 36 235 APS01555 20 6.0 6.0 14.5 14.0 40 H54521.0-24 36 235 APS01555-A 16-2BR 6.0 6.0 12.5 12.5 40 RADIAL TIRES Tire Size PR MPH Part Number Belt CL: Cut Depth Limit (mm) LL: Cut Length Limit (mm) Number Cuts for To First Belt Removal Limit Rejection Limit of Belts Removal Rejection Removal Center Second Shoulder Center Second Shoulder Center Second Shoulder (Tread) (Belt) 2457.7R10 16 225 APR01220 4 1 6.0 7.0 7.5 8.5 7.5 8.5 30 20 2757.75R15 12 225 APR05100 5 2 5.0 5.5 7.5 9.0 7.5 9.0 40 20 2757.75R15 12 225 APR05101 4 1 5.0 5.5 6.5 7.0 6.5 7.0 40 20 2757.75R15 12 235 APR05102 4 1 5.0 5.5 6.5 7.0 6.5 7.0 40 20 3058.8R15 16 225 APR05140 7 2 6.5 6.5 7.0 7.0 7.0 7.0 40 20 3058.8R15 16 225 APR05145 5 2 6.5 6.0 8.0 8.0 8.0 8.0 40 20 H38513.0R18 20 225 APR04220 6 1 6.5 8.0 8.0 9.5 8.0 9.5 40 20 40516.0R16 16 235 APR06700 6 2 7.5 9.0 10.0 10.0 10.0 10.0 50 20 H41516.0R20 22 225 APR04270 8 1 7.0 9.0 8.5 10.5 8.5 10.5 40 20 42517.0R18 26 235 APR06620 7 2 7.5 7.0 9.0 8.0 9.0 8.0 50 20 43517.5R17 32 235 APR06600 8 2 8.0 7.5 10.0 11.0 11.0 11.0 50 20 H44.5516.5R21 30 235 APR04450 8 2 7.5 7.5 6.5 10.0 10.0 9.0 10.0 10.0 9.0 50 20 45518.0R17 36 235 APR06800 8 2 7.0 8.5 9.0 10.5 9.0 10.5 50 20 46517R20 30 225 APR06751 11 2 8.0 8.0 9.0 9.0 9.0 11.5 50 20 46517R20 30 225 APR06752 7 2 7.0 8.0 9.0 9.0 9.0 9.0 50 20 46517R20 30 225 APR06755 8 2 6.5 7.5 12.5 9.0 8.5 12.5 10.5 10.5 14.0 50 20 50520.0R22 26 235 APR07620 7 2 7.0 7.0 8.0 8.0 8.0 8.0 50 20 50520.0R22 26 235 APR07624 8 2 6.5 8.5 13.5 9.5 11.5 13.5 11.0 13.0 15.0 50 20 50520.0R22 26 235 APR07630 7 2 6.5 7.5 8.5 9.0 10.5 10.5 9.0 10.5 10.5 50 20 50520.0R22 32 235 APR07621 8 2 8.0 8.0 8.0 8.0 9.0 9.0 50 20 50520.0R22 32 235 APR07626 9 2 6.5 8.5 13.5 9.5 11.5 13.5 11.0 13.0 13.5 50 20 50520.0R22 32 235 APR07631 8 2 6.5 8.5 10.5 9.0 11.0 12.0 10.5 12.5 13.5 50 20 50520.0R22 34 235 APR07632 10 2 6.5 8.5 10.5 9.0 11.0 12.0 10.5 12.5 13.5 50 20 50520.0R22 34 235 APR07642 8 2 8.0 8.0 9.0 10.5 10.5 11.5 10.5 10.5 11.5 50 20 50520.0R22 34 235 APR07650 8 2 8.0 8.0 9.0 10.5 10.5 11.5 10.5 10.5 11.5 50 20 50520.0R22 34 235 APR07660 9 2 8.0 6.5 9.0 10.5 9.0 11.5 10.5 9.0 11.5 50 20 52521.0R22 36 235 APR07700 10 2 7.5 10.0 11.5 10.0 12.0 15.0 12.0 14.0 16.0 50 20 52521.0R22 36 235 APR07740 8 2 8.5 9.0 8.0 11.0 11.5 10.5 11.0 11.5 10.5 50 20 52521.0R22 36 235 APR07750 8 2 7.5 7.0 8.0 10.0 9.5 10.5 10.0 9.5 10.5 50 20 54521.0R23 38 235 APR07850 10 2 6.5 8.5 9.5 9.0 11.0 12.0 9.0 11.0 12.0 50 20 10505395R16 28 235 APR06500 6 2 7.0 6.5 9.0 9.0 9.0 9.0 50 20 10505395R16 28 245 APR06505 6 2 7.0 6.5 9.0 9.0 9.0 9.0 50 20 12705455R22 30 225 APR07000-A 8 2 7.0 7.0 8.0 8.0 9.0 9.0 50 20 12705455R22 30 225 APR07001 8 2 7.0 7.0 8.0 8.0 9.0 9.0 50 20 12705455R22 30 225 APR07002 8 2 6.0 8.5 14.0 8.5 9.5 14.0 10.0 11.5 15.5 50 20 12705455R22 32 225 APR07010 8 2 6.0 8.5 14.0 8.5 9.5 14.0 10.0 11.5 15.5 50 20 12705455R22 32 235 APR07011 10 2 5.5 6.0 6.5 8.0 8.0 8.0 8.0 8.0 8.0 50 20 14005530R23 32 235 APR06900 7 2 8.0 8.0 9.0 9.0 9.0 9.0 50 20 14005530R23 36 235 APR06910 8 2 8.0 8.0 9.0 9.0 10.0 10.0 50 20 14005530R23 36 235 APR06911 9 2 5.5 7.5 10.5 8.0 8.5 10.5 9.5 10.5 10.5 50 20 14005530R23 40 235 APR06912 10 2 6.0 6.5 7.0 8.5 9.0 9.0 8.5 9.0 9.0 50 20 14005530R23 42 235 APR06931 11 2 5.0 5.0 6.0 7.5 7.5 8.5 7.5 7.5 8.5 50 20 89