Calculate maximum tire load capacity from load index rating and determine if tires meet vehicle weight requirements.
Input Parameters
Results
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Max Load Per Tire
lbs
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Total Tire Capacity
lbs
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Safety Margin
%
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Load Status
Note: Load index ratings range from 70 (~739 lbs) to 126 (~3,748 lbs). Always ensure total tire capacity exceeds GVWR by at least 10% for safety.
Reference
Max Load ≈ Base_load × 1.022^(LI − Base_LI)
Total Capacity = Max Load Per Tire × Number of Tires
Safety Margin = (Total Capacity − GVWR) / GVWR × 100%
Load Index 91 = 1,356 lbs per tire (reference)