3 Classes of Tire Chains SAE Class S, Class U, and Class WUpdated a year ago

The Society of Automotive Engineers (SAE) has established three classes of tire chains, designated as SAE Class S, SAE Class U, and SAE Class W. Here is a brief description of each class:

1. SAE Class S:

• Description: These are designed for vehicles with restricted wheel well clearance.
• Clearance Requirement: Less than 1.46 inches (37 mm) of clearance around the tire.
• Usage: Typically used for passenger cars, vans, and SUVs where space between the tire and the vehicle components is limited.

2. SAE Class U:

• Description: These chains are for vehicles with more clearance than Class S but still need to be mindful of space.
• Clearance Requirement: At least 1.97 inches (50 mm) of clearance around the tire.
• Usage: Suitable for light trucks and larger SUVs that have moderate wheel well clearance.

3. SAE Class W:

• Description: These are heavy-duty chains designed for vehicles with ample clearance.
• Clearance Requirement: At least 2.5 inches (63.5 mm) of clearance around the tire.
• Usage: Typically used for larger trucks, commercial vehicles, and off-road vehicles that require robust chains for severe conditions.

Summary:

• SAE Class S: For vehicles with very limited clearance.
• SAE Class U: For vehicles with moderate clearance.
• SAE Class W: For vehicles with ample clearance.

These classes help ensure that the appropriate type of tire chain is used for different vehicle configurations and clearance requirements.