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OTR DATA BOOK
OFF-THE-ROAD
TYRE
ENGINEERING
DATA

Tyre selection and sourcing
Tyre dimensional data

Load tables
TKPH and WCF values

Tread depths

OFF-THE-ROAD TIRES
TABLE OF CONTENTS
SECTION

SUBJECT

PAGE

1

Introduction/Tire Selection
General Notes and Information … ……………………………………………
Tire Selection …………………………………………………………………Industry Codes ………………………………………………………………
Tire Suffix Letters ……………………………………………………………
Tire Economics ………………………………………………………………
Ton-Mile-Per-Hour Formula … ………………………………………………
Work Capability Factor ………………………………………………………
Mixing of Bias and Radial Tires On Vehicle ……………………………………
Comparative Size Chart ………………………………………………………
Star Rating/Ply Rating Equivalent ……………………………………………
Tire Nomenclature……………………………………………………………
Conversion Factors …………………………………………………………….

I
II
V
V
VI
VII
VIII
X
XI
XI
XII
XIV

2

Data/Load Limits
Conventional Size ……………………………………………………………
Wide Base Size ………………………………………………………………
65 Series ………………………………………………………………………
Metric Size ……………………………………………………………………
Underground Mine ……………………………………………………………

1
33
59
63
65

3

Load Variations
Drive-Away…………………………………………………………………… 67
Load Index Speed Symbol Markings ………………………………………… 72
Load/Speed Variation Factors ………………………………………………… 75

4

Tire Shipping Data – Tire Weights and Tire Shipping Volumes

77

5

Tubes – Flaps – Valves – Rims

85

6

Goodyear Global Sales Offices

95

OFF-THE-ROAD TIRES
INTRODUCTION
GENERAL NOTES AND INFORMATION
AVAILABILITY
Sizes listed in this book include tires currentlyavailable on a global basis and tires previously
made but no longer produced. “Current In Line Locations” are regions of the world where the
tire is produced or inventoried and available for sale.
For current availability of specific sizes and types of tires contact your Goodyear Representative.
Construction

All tires are reinforced with nylon cords, except Unisteel Radial Ply tires, which arereinforced with steel cords.

Dimensional Data

Dimensions of tires are for tires on design rims.
Dimensions on other rims are the same except for tire widths. Change tire widths .2” (5.08mm) for
each 1/2” (12.7mm) change in rim width.

Inflation Pressure

The inflation pressures shown in this data book are those taken with the tires at approximately the
prevailing atmospherictemperatures and do not include any build-up due to vehicle operation.

RIMS
Selection of Rims
Strength and Application of Rims
Rim & Wheel Restrictions
Shipping Pressures
Suffix Letters
Tire Codes

Tire Selection
Valves

1

INTRODUCTION
TIRE SELECTION

For information on rim selection see Page 92.
Contact your rim supplier regarding information on rim strength and application.
Forinformation on rim & wheel restrictions consult rim manufacturer.
Recommended shipping pressures are the maximum inflation pressure for the tire size and ply rating
shown on tables.
For information on suffix letters see Page V.
Industry Tire Type Codes, as approved by the Tire and Rim Association, are shown whenever such
codes are assigned to specific tires. (This code is used as industrycomparison reference of Off-The-Road Tires
regardless of the manufacturers’ design name See Page V).
For information on tire selection see Pages II, III, IV.
Consult your Valve Supplier for valve information. Also see Pages 85-91.

I

SELECTION OF TIRES AND RIMS FOR
OFF-THE-ROAD VEHICLES AND DEFINITIONS OF TERMS
TIRE SELECTION
NEW VEHICLE DESIGN - Proper tire size and ply rating selectionshall be based on Gross Tire Load and the operating conditions specified
in the table from which the tire is being selected. Gross tire loads shall be based on the highest individual wheel load
determined by the Gross Vehicle Weight (GVW) distribution.
For New Haulage, Dozer and Loader Vehicle Design, the following maximum inflation pressures with the...