tiredetailreports 1420 it

Size of Tire .......................................... 245/40R18 97Y Tread Radius (Inflated), In. ............. 50.00/20.00/12.00Make & Description ............................ BRIDGESTONE Tread Arc Width (Inflated), In. ............................... 8.32 Potenza RE050A Steel Belted Radial Non-Skid Depth, In. ............................................... 0.32Serial Number ............................ DOT 7GJX N5P1610 Tread Thickness, In. ............................................. 0.37No. of Plies/Load Range............................... 2+2+1 XL Total Crown Thickness, In. ................................... 0.61Tire Weight .................................................. 26.45 Lbs. Total Shoulder Thickness, In. ............................... 0.53Rim & Inflation ....................................... 18x8.5 26 PSI Shoulder Tread Rubber Thickness, In. ................. 0.23Cross Section (Inflated), In. .................................. 9.82 Cushion, In. ........................................................... 9.60Overall Diameter (Inflated), In. ............................ 25.78 Air Volume, Cu. In. ............................................... 1947Outside Perimeter -Heel to Heel, In. ................... 16.17 Material Volume, Cu. In. ......................................... 554Inside Perimeter -Toe to Toe, In. ........................ 15.25 Inside Bead Circ., In. -Heel ................................. 57.30Toe to Heel, In. ...................................................... 0.59 Inside Bead Diam., In. -Heel ............................... 18.24 Size Factor, In. .................................................... 35.60

CARCASS CORD DATA (Rayon) Ply 1 Ply 2 Avg Plies(1-2)Cord Construction ................................ (1650)/2 (1650)/2 Cord Tensile-Conditioned, Lb. ............. 32.0 32.2 32.1Cord Tensile-Bone Dry, Lb. ................. 34.2 36.2 35.2LASE @ 3% Conditioned, Lb. .............. 9.6 10.2 9.9LASE @ 3% Bone Dry, Lb. ................. 15.5 15.7 15.6Elong. @ Break-Conditioned, % ......... 15.3 14.9 15.1Elong. @ Break-Bone Dry, % .............. 10.6 10.9 10.8Cable Twist, Turns per Inch ................. 12.0 12.0 12.0Direction of Twist .................................. z/s z/s Cord Gauge, In. .................................... 0.028 0.028 0.028Cords/Inch-Crown-Normal ................... 19.5 19.0 19.3Cords/Inch-Crown-Circum. .................. 19.5 19.0 19.3Cord Angle-Crown, Deg. ..................... 89.0 88.0 88.5Picks per Inch ....................................... 1.7 1.7 1.7Ply Lay .................................................. ---- ----

Ply Gauge @ Crown: Bottom of Ply 1 to Top of Ply 2 ........ 0.028 In.Including Belts

Total Carcass Strength/Inch-Normal ..... 1359 Lb. : Cond. 1239 Lb. 8920 Lb. : Cond. 8825 Lb.Total Carcass Strength/Inch-Circum. .... 1359 Lb. : Cond. 1239 Lb. 3953 Lb. : Cond. 3833 Lb.

TIRE SPECIFICATION NO. 1420-ITBRIDGESTONE

PoznanSMITHERS RAPRA, INC.

POLAND

September 15, 2010Copyright 2010 by Smithers Rapra, Inc.All rights reserved.

BELT DATA Position 1 Position 2 Position 3Material .......................................... Wire Wire Aramid/NylonCord Construction .......................... 1x5x0.22mm (1500)/2/(1260)/1Tensile, Lb. .................................... 141 ----O.D. (without wrap) ........................ 0.74mm ----Cable Construction ........................ 1x5x0.22mm ---- Lay ....................................... 0.38 Left ----Total Wires ..................................... 5 ----Cord Tensile -Conditioned, Lb. ...... ---- ---- 107.8Cord Tensile -Bone Dry, Lb. .......... ---- ---- 106.7Cable Twist, Turns per Inch ........... ---- ---- 7.0Direction of Twist ........................... ---- ---- z/sCord Gauge, In. ............................. ---- ---- 0.032Picks per Inch ................................ 0.0 0.0 1.7Cords/Inch-Crown-Normal ............. 18.0 18.5 22.5Cords/Inch-Crown-Circum. ............ 9.3 9.0 0.0Cord Angle-Crown, Deg. ................ 31.0 29.0 0.0Belt Lay .......................................... Right Left CircumBelt Width, In. ................................ 8.60 7.98 9.15Belt 3 is apparently made up of continuously-wound 3-ply hybrid cord made up of 2 yarns aramid and 1 yarn of nylontwisted together.

FLIPPER: None

CHAFER Position 1 Position 2Material .......................................... Nylon Rubber Mono-Fil. WovenCords/Inch (Count) ........................ 24x24 ----Width, In. ........................................ 2.30 2.00

SQUEEGEE: NoneBEAD: 4 turns 5 strands of 0.049 in. diameter wire. Semi-hard rubber insulation and filler

stock. Square-cut, lightweight fabric cover. Tensile - 626 Lb.

VISCOELASTIC TREAD RUBBER PROPERTIES(Temperature -30 to 60, Strain Amplitude 0.25%, Frequency 10Hz, Ramp Rate 2C/min.)

Temperature(C)-2502560

E'Elastic

Modulus(MPa)

976.9958.827.9317.46

E''ViscousModulus

(MPa)354.3224.568.523.48

Tan dTangent

Delta --

0.360.420.30.2

E*ComplexModulus

(MPa)1039.363.7229.217.8

D''Loss

Compliance(MPa-1)0.00030.0060.010.011

Spec. No. 1420-ITSheet #2


ROOM TEMPERATURE 100 Deg. C.ADHESIONS AVG. MAX. AVG. MAX.Sidewall & Carcass, PPI ......................... 114 152 B 73 102 Belt 1 & Carcass, PPI ............................. 48 60 30 36 Belt 1 & Belt 2, PPI ................................. 57 69 32 48 Tread & Belt 3, PPI ................................. 79 101 42 57 B=Rubber Break

BLACK PHYSICAL PROPERTIES TREAD SW LINERHardness ................................................ 70 60 58 Stress @ 100% Elong., PSI ................... 570 330 270 Stress @ 200% Elong., PSI ................... 1350 850 520 Stress @ 300% Elong., PSI ................... 2300 1560 830 Stress @ 400% Elong., PSI ................... 3220 2280 ----Stress @ 500% Elong., PSI ................... ---- 2960 ----Stress @ Break, PSI .............................. 3580 3030 1040 Elongation @ Break, % .......................... 440 510 370

SHLD BASE RBR BEADOF TREAD CHAF FILLER

Hardness ................................................ 70 70 87

BLACK BELT BEADCHEMICAL ANALYSIS TREAD SW LINER COMPD FILLERSpecific Gravity ............................... 1.222 1.141 1.264 1.195 1.210Plasticizer, % .................................. 12.27 5.82 6.30 8.69 6.55Ash, % ............................................ 32.72 1.99 18.86 5.64 5.00Insol in HCl, % ................................ 31.20 0.12 0.51 0.13 0.24Carbon Black, % ............................. 4.41 33.16 26.86 31.94 35.70Total Sulfur, % ................................ 1.77 1.54 0.80 3.67 3.32Zinc Oxide, % ................................. 0.76 1.41 0.69 3.93 3.81Calcium Carbonate, % .................... 0.07 0.15 14.23 0.71 0.28Titanium Dioxide, % ........................ ---- ---- ---- ---- ----Silicon Dioxide, % ........................... 30.52 ---- ---- ---- ----Rubber Polymer By Weight, % ....... 51.26 57.45 46.95 53.78 53.11Insol in H2SO4, % .......................... ---- ---- ---- ---- ----Magnesium Oxide, % ..................... ---- ---- 0.21 ---- ----Cobalt, % ........................................ ---- ---- ---- 0.10 ----Polymer, % ...................................... 100SBR 40NR CIIR 100NR 70NR

60BR 30SBR

RBRCHAF

Specific Gravity ...................................... 1.160

Spec. No. 1420-ITSheet #3


STICKER: NONEREMARKS: Tread and black sidewall are of different stock. Liner stock apparently extends from 0.60

in. above toe on one side to 0.60 in. above toe on other side and is approx. 0.047 in. inthickness at crown. Minimum inner liner gauge is 0.032 in. at shoulder. Liner splice is onan approx. 88 deg. angle. Venting: Inside of tire has angular vents spaced approx. 0.20in. apart at bead. Vents are approx. 7.70 in. long on serial side and approx. 8.00 in.long on non-serial side, approx. 0.05 in. wide and approx. 0.01 in. raised.Tread has atotal of 34 pitches. Tread mold is divided into 9 radial segments. Each sidewall has athin gum strip located between the liner and ply 1 which extends down from the shoulderarea and is approx. 5.00 in. in length. Serrated outlined black letters: approx. 0.30in. to approx. 0.60 in. in height, approx. 0.02 in. raised and approx. 0.02 in. outlined. Treadwear indicators are marked with 6 triangles around the shoulder of the tire.

PITCH SEQUENCE MEASUREMENT Code Identification - 1= Smallest

7= Largest( ) = Radial Segment within PitchTotal of 34 pitches. (See tread footprint for point of measurement)

(3)57(4)644(4)576(4)57(3)427(4)464(1)1427(6)57(7)777TIRE FOOTPRINT DATALoad on Tire, Lb. ................................. 1365 @ 30 PSI 1365 @ 35 PSITotal Footprint Area, Sq. In. ................ 43.11 38.35Net Contact Area, Sq. In. .................... 28.48 25.10Loaded Radius, In. .............................. 11.98 12.07Tread Width from Footprint, In. ........... 7.92 7.75Loaded Deflection, In. ......................... 0.91 0.82Loaded Section Width, In. ................... 10.32 10.28TIRE PLUNGER DATA 3/4 In. Plunger, 2 In./Min. @ 26 PSIAvg. Force, Lb. .................. 1979Avg. Penetration, In. ............ 4.15Avg. Energy, In.-Lb. ............. 4106

5 Bottom

INDIVIDUAL BREAKS (DOT 139 Procedure)PENETRATION (In.) LOAD (Lb.) PLUNGER ENERGY (In.-Lb.)

4.11 1964 4036 Bottom4.15 1979 4106 Bottom4.16 1979 4116 Bottom4.15 1984 4117 Bottom4.17 1989 4147 Bottom

Minimum DOT 139 Plunger Energy - 2600 In.-Lb.

Sheet #4Spec. No. 1420-IT


1004457 9/29/1074 656245/40R18 Bridgestone Potenza RE050A18X8.5 K. Downs730kg / 340 kPa 12.0297Y 2010-3 European Tire Analysis Report7GJX N5P 1610 1420-ITTire Service 1004457

SRC RR (Newtons) = 54.6730 RR Coefficient = 10.90340

alpha () -0.3863beta () 0.9988

a 0.0795b 2.0861E-04c -2.8727E-07 SMERF RR (Newtons) = 51.8

RR Coefficient = 10.35

501126080

SRC Load (Newtons) SMERF RR = 0.55(SMERF EPA Urban) + 0.45(SMERF EPA Highway)SRC Inflation (kPa): where SMERF EPA cycles are calculated by integratingSRC Speed (kph): RR = PL (a + bV + cV2) over the EPA cycles

SMERF RR calculated according to

Base Inflation Pressure (kPa):SRC RR calculated according to RR = PL (a + bV + cV2)

at Standard Reference Condition.

Standard Reference Condition (SRC)

Coefficients (Newtons/kPa/kph)

Test Order:Max Load/Max Inflation Weight (kg):

Order Number:

Load and Inflation for Test MatricesMax Tire Load (kg):

Manufacturer/Type:Shore: Tire O.D.(mm):

Rim SizeTire Size:

Customer:

Requested By:

DOT number: Tnumber:Load Index/Speed Symbol:

www.smithersscientific.com

SAE J2452 Rolling Resistance ReportDate:SSS Tire ID:

Smithers Scientific Services, Inc.1150 North Freedom Street

Ravenna, Ohio 44226Tel:330-297-1495 Fax:330-297-0038

80

RR Coefficient =

Inflation Rolling Inflation RollingPressure Load Speed Resistance Pressure Load Speed Resistance

Condition (kPa) (Newtons) (kph) (Newtons) Condition (kPa) (Newtons) (kph) (Newtons)1 350 2148 116.0 22.0 16 403 6442 37.8 54.82 351 2148 84.5 20.8 17 403 6442 23.1 53.23 351 2148 58.6 19.6 18 402 6442 13.8 51.74 351 2149 38.2 18.9 19 300 6441 115.3 69.65 351 2148 23.6 18.0 20 301 6441 84.0 66.26 350 2148 14.2 17.6 21 300 6441 57.9 63.37 300 4297 115.7 47.7 22 300 6441 37.8 61.48 301 4297 84.3 45.4 23 301 6441 23.0 59.39 301 4297 58.3 42.8 24 300 6439 13.7 57.6

10 301 4298 38.0 41.1 2511 300 4296 23.3 40.0 2612 299 4296 13.8 38.6 2713 402 6440 115.5 63.0 2814 403 6442 84.0 59.5 2915 403 6441 58.1 56.9 30

R2= 0.99940

Tire Type P-Metric(sl) LT-Metric LT FloatationP-metric (sl) 240 kPa 350 kPa 240kPaP-metric (xl) Pressure(kPa) 260 370 260LT Metric Speed (kph) 80 80 80

RR SRC ConditionLoad(N) 70%

T&RA at

Data points listed below are those used for regression

Base Inflation Pressure and Max. Load

Speed (kph):

SRC Speed (kph): RR = P L (a + bV + cV ) over the EPA cyclesand P and L are the Standard Reference Condition.

RR at other conditions RR at other conditions (N)= Load (newtons):Inflation (kPa):

Base Inflation(kPa) Max. Load (kg)240 Corresponding T&RA load for the load

index and size. Single operation load for LT tires

Marked in sidewallT&RA pressure at max. loadLT Metric Speed (kph) 80 80 80for LT tiresT&RA pressure at max. load

1420-IT Bridgestone Potenza RE050ABlueprintFootprintsPhotographRolling Resistance

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tiredetailreports 1420 it

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