Interactive, no-signup calculators built for owner-operators and fleet managers — figure out repair costs, DOT compliance, and fuel economy in seconds.
When your truck or trailer breaks down, the fastest decision you make can be the most expensive one. A tow to the nearest shop often looks simple, but semi-truck towing fees, shop labor rates, and downtime add up fast — sometimes far more than a mobile repair unit coming to you.
Use this tool →FMCSA regulations set a minimum tread depth requirement for every commercial vehicle tire — and the DOT minimum is stricter for steer axle tires than for drive and trailer tires. Running below these minimums is an out-of-service violation that can shut down your truck at a roadside inspection.
Use this tool →Formula B — commonly called the bridge formula or bridge law — determines the maximum weight any group of consecutive axles can carry based on axle count and spacing. Overweight violations are costly and put unnecessary stress on axles, bearings, and suspension components.
Use this tool →Knowing your true cost per mile is essential for pricing loads, budgeting maintenance, and staying profitable as an owner-operator or fleet manager. Fuel is typically the largest single variable cost, but it's only part of the picture — fixed monthly costs and maintenance cost matter just as much once you're figuring out what to charge.
Use this tool →A thorough CDL pre-trip inspection is required by FMCSA regulations and is one of the best ways to catch small problems before they become roadside breakdowns or DOT violations. It's also the exact skill CDL examiners test during the licensing exam using a standardized 7-step vehicle inspection sequence.
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