6 Tread─ For excellent road handling and water drainage. MaterialSynthetic and natural rubberFunctions1.Wear Resistance2.Heat Generation Resistance3.Puncture ResistanceBecause the tire tread connects with road directly, wear resistance, heatgeneration resistance, and Puncture resistance are important necessaryelements in pattern design. Moreover, tread compound should beflexible and resistant to age.
7 Inner Liner ─ Makes tire airtight and prevents air from leaking. MaterialButyl rubberFunctionsPrevent air leakingThe Inner lining of rubber located inside thecarcass rubber prevents air leaking from thetire.A Tire sidewall mark as” STEEL BELTEDTUBELESS” means it's not necessary to use atube.
8 Carcass (Textile cord plies) ─Keep tire in fixed shape. MaterialRayon or polyesterFunctionsMaintain tire shape when pressure inflated.The tire carcass is a framework to support and fix the tires shape after itsbeen inflated.
9 Steel Belt- Keep tire stability and handling performance MaterialHigh-strength steel cordsFunctions1. Keeps tire shape and directionalstability.2. Reduces rolling resistance.The Steel belt maintains high shear stress, it also transits from hard tiretread to soft sidewall.Tire steel cord must be high strength and resistant to fatigue.
10 Sidewall─ Provent damage to tire lateral side. MaterialNatural rubberFunctionsProtect tire casing from lateraldamage.A Radial tire sidewall bending deformation is larger thanthe Bias tire , therefore it needs bending resistancecompound for tire sidewall.
11 A harder bead filler made from rubber is normally used to enhance the Bead Filler ─ For tire steady ability, handling performance, and comfort level.MaterialSynthetic rubberFunctions1.Enhances handling ability.2.Gives steering precision.3.Improves comfort.A harder bead filler made from rubber is normally used to enhance thetire sidewall to ensure radial tire steel layer is kept intact.
12 A Traditional Nylon cover coated method is used Nylon Full Cover (Jointless plies)─ Protect tire structure in high speed condition.MaterialNylon, embedded in rubberFunctionsEnhances high-speedstability.A Traditional Nylon cover coated method is usedto enclose an entire layer of tire after theengagement.
21 ~55 Series 60 Series 65 Series 70 Series 80 Series High aspect ratio tire provide comfort, where as a Low aspect ratio tireleans towards the more sport related performance tire.Low Aspect Ratio(%)High Aspect Ratio(%)SPORT~55 Series60 Series65 Series70 Series80 SeriesCOMFORT
22 Inch Up Tire Inch Up Characteristics: 1.Enhance the handling stability 2.Enhance Cornering Performance3.Less comfortable when driving4.More road noiseOuterDiameterRimDiameterInch Up
23 3.1Tire Size Designation-Speed & Load Index Load Index (LI)Max load per individual tireLIKg693258450070335855157134586530723558754573365885607437589580753879060076400916157741292630784259365079437946708045095690814629671082475977308348798750Speed Index (SI)SIMax speed for passenger car tireQ160 km/h / 99mphR170 km/h / 106mphS180 km/h / 112mphT190 km/h / 118mphH210 km/h / 130mphV240 km/h / 150mphW270 km/h / 169mphY300 km/h / 187mphZRExceeding 240 km/h / 150mph
24 3.2 UTQGUniform Tire Quality Grade, UTQG, by the U.S. National Highway TrafficSafety Administration, NHTSA regulated. It is comprised by Treadwear,Traction, and Temperature.UTQG is required by law for most passenger car tire (PCR), but it is notrequired for LIGHT TRUCK TIRES, WINTER TIRES, TEMPORARY SPARE TIRES,TRALIER TIRES, AND TIRES UNDER 12”
25 3.2 UTQGTREADWEARTreadwear means tread lifespan compared to standard tires index 100.Tread wear grades typically range from 60 to 500, each increment of 20units. In fact tire wear conditions caused from road quality, drivingattitude, tire inflation pressure, and vehicle condition.TRACTIONTraction test only on specific wet concrete road or asphalt road in a straightline moving forward.Grades range from AA, A, B to C. AA is the best performance.TEMPERATURETEMERATURE grades range from A, B to C. It represents that tire under theindoor high speed testing conditions, tires properly maintain the coolingcapacity until damage.
26 3.3 DOTDOT Code means tires comply with U.S. Department of Transportation(DOT) safety standards.The first two letters represent tire manufacturer and factory code.The 3rd and 4th letters mean tire size.The 5th, 6th, 7th, and 8th letters represent tire specific function (SPEC).The 9th and 10th of the letter marked the week of tires production.The last number indicates the year of tires production.
33 Tire Building Procedure 1.Building Process 305/35R24 112V N-990 →Inner Liner Extruding →Carcass Cutting →Jointless Bead Building →Combine bead with Carcass →Auto Steel Belt Cutting System →Jointless Cover System →Tread Extruding and Cutting →1st and 2nd Steps combination 2.Curing Process 3.DB and UF Inspection 4.Indoor High Speed and Durability Test
34 Tire Testing1.Safety Test 2.Off-Road Test 3.Rolling Resistance Test 4.Noise Test 5.Cornering Test 6.Braking Test
36 These are major factors for tire pattern design. 1.Excellent grip traction on wet/dry roads.2.Handling performance.3.Drainage ability.4.Avoid irregular tread wear.And………..5.A Charming Tire.
37 Tire Basic Design Theory Rib Pattern:1.Reduce tire rolling resistance.2.The rib pattern tire used to adopt as comfort ability tire.Lug Pattern:1.Offer excellent handling and braking ability for off road.Rib-Lug Pattern:1.Center Rib: Handling, Stability and Skid proof ability.2.Shoulder Lug: Handling and Braking ability.Block Pattern:1.Offer excellent handling and braking ability.2.Keep stability at snow and mud road