Tire Guides, Inc. - Publications on tire fitment, sizing and grading, tire tread designs, tire forensic, etc.

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Tire Safety

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Tire Tips & Charts

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Tire Speed Rating System
Wheel Lug Nut Torque Sequences
Uniform Tire Quality Grading
Alpha-Numeric Conversion Chart
Passenger Tire Conversion Chart '65-'75
Passenger Tire Conversion Chart 50's-60's
Adjustment Treadware Chart
Tire Terms
Tire Dimensions and Measurement Definitions
Irregular Tire Wear - Causes & Solutions
Most Popular Tire Sizes
Wheel Alignment
Functions of Pneumatic Tire
Parts of the Standard Radial Tire
Parts of the High Performance Radial Tire
Basic Wheel Information
How to Read a Tire Sidewall (P-Metric)
How to Read a Tire Sidewall (European Metric)
How to Read a Tire Sidewall (Light Truck)