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Tire Structure
Tire Sidewall
Sizes & Specs
Load & Speed
TIRES CONSTRUCTION
Tread, Underread, Belts and Casing, inneiner, Sidewal, Bead Filer, Rim Cushion, and other components are structurally connected to complete the scientific structure of a tire.
Tread
Minimum tire treadwear and maximum traction means more fuel efficiency and resistance to fatigue, chipping, and scaling. GREENTOUR uses different compounds in the tread depending on a tire’s particular application demands.
Belt Edge Cushion
GREENTOUR’s tires utilize a belt edge cushion to help to improve durability and extend tire life.
Belts and Casing
Ultra-high tensile materials are used in GREENTOUR’s tire casing and belts to maximize the strength of the steel cords.
Sidewall
GREENTOUR’s special sidewall compounds feature high elasticity, outstanding endurance, and elevated resistance to fatigue and cracking.
Inner Liner
The inner liner is designed to maintain the air pressure of each tire to avoid damage. GREENTOUR’s unique inner liner compound ensures a significantly longer tire life.
Bead Filler
GREENTOUR’s bead filler is created using several different compounds to reinforce the bead for improved steering response and flexibility in other parts of the tire.
Rim Cushion
GREENTOUR’s rim cushion is profoundly resistant to the heat produced by the heavy load or transmitted by the rim to increase the tire life.
* Click the buttons to see the names and functions of each part.
Tire Sidewall
A tires sidewall protects the carcass on the inside and provides a comfortable riding experience due to its flexibility during cornering. The type of tire, size, structure, tread pattern, manufacturer, brand name and other detailed information are marked on the sidewall.
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GREENTOUR brand
Series name
Pattern name
Size designation
Country of origin
DOT
= U.S. Department of Transportation (responsible for tire safety standards) Tire complies with requirements set out in US Reg. FMVSS 119
Load designation
Data as per safety standards on inner construction or number of plies, in this case, Tread: under the tread, there are several steel cord plies (including casing) Sidewall: viewed from the side there is one steel cord ply (in this case the casing ply)
Tire type
Retreadable
Service description
Sizes & Specs
The selection criteria for tires change depending on the type of vehicle you own and your driving style. For a pleasurable driving experience, it is important to consider these factors when selecting an appropriate GREENTOUR product
Tire Section Width
The distance in a straight line between the sidewalls when the tire is attached to the rim, air pressure has been matched to tire standards and no weight is on the tire.
Tire Section Height
The results of subtracting the rim diameter from the tire's outer diameter and dividing by 2.
Aspect Ratio:
The ratio of section height to section with
Aspect Ratio = (Height)/ (Width) × 100
Rim Diameter
The distance between rim bases in contact with the rim flange (almost identical to the tires interior diameter).
Tire Overall Diameter
Tire interval when the tire is attached to the rim, air pressure has been matched to tire standards and no weight is on the tire.
Truck & Bus Tires
315 / 80 R 22.5
* Click the buttons for terminology and meanings of various parts.
TIRE SPEED & LOAD
Tire speed rating tells you the maximum service speed for a tire. A speed rating isn't, however, a recommendation to exceed speed limits, and doesn't indicate how well a tire handles or corners. Generally, it is recommended that a speed-rated tire be replaced with a tire having an equivalent or greater speed rating. For example, if the recommended speed rating is a V, it's suggested that you replace it with a V, W, Y, or Z It is not recommended to fit tires with different speed ratings. If tires with different speed ratings are installed on a vehicle, they should be installed with like pairs on the same axle. The speed capability of the vehicle will become limited to that of the lowest speed rated tires. Obey all speed limits.
Tire Speed Rating Chart
Service description speed symbolMaximum speed (KMH)Size speed symbol
A15
A210
A315
A420
A525
A630
A735
A840
B50
C60
D65
E70
F80
G90
J100
K110
L120
M130
N140
P150
Q160
R170
S180
T190
Y200
H210VR
V240ZR
W*270
Y*300

* W- and Y-speed ratings are subcategories of the Z-speed rating.

** Per the TR&A 2007 yearbook, for tires having a maximum speed capability above 240 km/h (149 mph), a ZR may appear in the size designation. For tires having a maximum speed capacity above 300 km/h (186 mph), a ZR must appear in the size designation and a service description, including the Y speed symbol, must be included in brackets.

Tire Load Index Chart
Load IndexLoad (kg)
62265
63272
64280
65290
66300
67307
68315
69325
70335
71345
72355
73365
74375
75387
76400
77412
78425
79437
80450
81462
82475
83487
84500
85515
86530
87545
88560
89580
90600
91615
92630
93650
94670
95690
96710
97730
98750
99775
100800
101825
102850


Load IndexLoad (kg)
103875
104900
105925
106950
107975
1081000
1091030
1101060
1111090
1121120
1131150
1141180
1151215
1161250
1171285
1181320
1191360
1201400
1211450
1221500
1231550
1241600
1251650
1261700
1091030
1101060
1111090
1121120
1131150
1141180
1151215
1161250
1171285
1181320
1191360
1201400
1211450
1221500
1231550
1241600


Load IndexLoad (kg)
1251650
1261700
1271750
1281800
1291850
1301900
1311950
1322000
1332060
1342120
1352180
1362240
1372300
1382360
1392430
1402500
1412575
1422650
1432725
1442800
1452900
1463000
1473075
1483150
1493250
1503350
1513450
1523550
1533650
1543750
1553875
1564000
1574125
1584250
1594375
1604500
1614625
1624750
1634875
1645000


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