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Difficulty: MediumTires, Wheels, and Rims Inspection

Dual tires mounted on the same axle hub of a commercial motor vehicle are permitted to make direct physical contact with each other as long as both tires maintain equal inflation pressure.

Answer: Answer

Answer

False
Dual tires must maintain adequate clearance and must never touch. When dual tires make contact, friction between the rubbing sidewalls creates extreme heat buildup, leading to rapid casing deterioration, blowouts, and tire fires.

Step-by-Step Solution

1
Analyze commercial vehicle safety inspection criteria concerning dual tire spacing.
Pre-trip and en-route inspection standards require adequate clearance between dual tires to ensure they do not touch.
Dual tires rotate under dynamic load and flex during vehicle operation.
2
Evaluate the thermal and structural hazards of dual tires rubbing against each other.
Sidewall contact creates continuous friction, generating high temperatures capable of igniting tire fires or causing sudden blowouts.
Maintaining correct or equal air pressure does not mitigate the danger of friction when dual tires physically rub together.
3
Determine the validity of the statement.
The statement is False because touching dual tires represent a serious safety defect and an inspection violation.
Regulations strictly prohibit dual tires from contacting one another under any condition.

Key Concept

Dual Tire Spacing and Contact Prohibition
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Topics

Tires, Wheels, and Rims Inspection

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