The Foundation of Vehicle Safety

Tire and Wheel issues are responsible for a significant monthly average of 30,079 violations. This group encompasses low tread depth, visible tire damage, flat tires, and major component failures. These failures include loose or missing wheel studs. Also included are violations related to Tire vs. Load. This means the tire’s capacity rating is insufficient for the axle weight. A tire failure at highway speed is one of the most dangerous mechanical defects. It dramatically increases the risk of loss of control. Since tires are the only point of contact with the road, their condition is paramount to vehicle control.

Consequences and the OOS Risk

Tire and wheel violations frequently lead to an Out-of-Service (OOS) order. Any tire with less than 2/32-inch tread depth on a major groove, a flat, or an audible leak is an automatic OOS violation. Furthermore, missing or cracked wheel components, such as a missing lug nut, can also result in an OOS order. The range for fines is typically between $800 and $2,500 per violation. The immediate cost of the OOS time and roadside repair is often the most damaging consequence. Carriers with poor tire maintenance history will see high severity weighting in the CSA Vehicle Maintenance BASIC category. This makes your entire fleet a target for future roadside scrutiny.

Pre-Trip Checks and Prevention

Drivers must use a tire pressure gauge, not just a tire thumper. They should check every tire for correct pressure before each trip. Pre-trip inspections must include a full walk-around inspection for cuts, bulges, and irregular wear patterns on all tires. Drivers must use a depth gauge to verify adequate tread. For Wheels Studs Clamps Etc. violations, drivers must look for rust trails or shiny metal streaks near the lug nuts. These are clear signs that a wheel component is loose and about to fail. If these signs are present, the vehicle must be immediately removed from service for repair.

Roadside OOS Emergency Response

If an inspector places the vehicle OOS for a tire or wheel defect, the driver must not attempt to move the truck. Managers must immediately assess the situation using the OOS Emergency Response Protocol (see Article 2), focusing on these questions:

1. Is it a Simple Fix? Can a roadside mobile tire service (Option A) be dispatched to fix the flat or replace the tire immediately? If lug nuts are loose, can they be re-torqued?
2. Is Towing Necessary? If the issue is complex (e.g., a cracked rim or wheel-end failure), Option B (Tow and Fix Your Truck) is usually required, as these are not mobile repairs.
3. Cargo Impact: If a perishable load is delayed due to complex towing, immediately execute the Cargo Transfer (Option C) to protect the customer relationship and product integrity.

The Maintenance Solution

Implement a mandatory Tire and Wheel Preventative Maintenance (PM) Program. This program should be separate from regular oil changes. It should focus solely on tire rotation, balancing, and alignment checks every 50,000 miles. Invest in an Automatic Tire Inflation System (ATIS) or a Tire Pressure Monitoring System (TPMS) for all tractors and trailers. These technologies provide real-time data. This allows managers to spot under-inflation before it causes a failure. For Tire vs. Load issues, ensure the correct tire specifications are used when purchasing new equipment. Always match tire capacity to the vehicle’s heaviest anticipated axle load.

Also read: Mastering Your Brakes: Preventing the #1 CMV Violation and Lighting Defects: Your Fleet’s Biggest Roadside Risk