{
  "name": "Tire load margin JSON endpoint",
  "description": "Returns per-axle tire load reserve, adjusted per-tire load after side-to-side imbalance, overload flags, and scale-ticket watch-outs.",
  "publisher": {
    "name": "OffGridRVHub",
    "url": "https://www.offgridrvhub.com"
  },
  "source": {
    "endpoint": "https://www.offgridrvhub.com/tools/api/tire-load.json",
    "fullCalculator": "https://www.offgridrvhub.com/tools/tire-load-calculator",
    "assumptions": "https://www.offgridrvhub.com/tools/calculator-assumptions",
    "documentation": "https://www.offgridrvhub.com/tools/calculator-api"
  },
  "caveat": "This is a planning estimate for RV education and comparison. It is not electrical, plumbing, safety, or installation advice.",
  "input": {
    "rigType": "travel-trailer",
    "axleWeights": [
      {
        "label": "Trailer axle 1",
        "measuredWeightPounds": 4200,
        "tireCount": 2,
        "tireLoadRatingPounds": 2830
      },
      {
        "label": "Trailer axle 2",
        "measuredWeightPounds": 4300,
        "tireCount": 2,
        "tireLoadRatingPounds": 2830
      }
    ],
    "sideToSideImbalancePercent": 10,
    "targetReservePercent": 10,
    "scaleWeightIncludesTripLoad": true
  },
  "result": {
    "totalMeasuredWeightPounds": 8500,
    "totalRatedTireCapacityPounds": 11320,
    "lowestMarginPercent": 16,
    "tightestAxleLabel": "Trailer axle 2",
    "overloadedAxleCount": 0,
    "tightAxleCount": 0,
    "axles": [
      {
        "label": "Trailer axle 1",
        "measuredWeightPounds": 4200,
        "tireCount": 2,
        "tireLoadRatingPounds": 2830,
        "ratedCapacityPounds": 5660,
        "averageLoadPerTirePounds": 2100,
        "adjustedLoadPerTirePounds": 2310,
        "marginPerTirePounds": 520,
        "marginPercent": 18,
        "capacityUsedPercent": 82,
        "estimatedExtraAxleCapacityPounds": 1040,
        "status": "usable"
      },
      {
        "label": "Trailer axle 2",
        "measuredWeightPounds": 4300,
        "tireCount": 2,
        "tireLoadRatingPounds": 2830,
        "ratedCapacityPounds": 5660,
        "averageLoadPerTirePounds": 2150,
        "adjustedLoadPerTirePounds": 2365,
        "marginPerTirePounds": 465,
        "marginPercent": 16,
        "capacityUsedPercent": 84,
        "estimatedExtraAxleCapacityPounds": 930,
        "status": "usable"
      }
    ],
    "verdictTitle": "Tire load margin looks usable",
    "verdictDetail": "Trailer axle 2 is the tightest axle at 16% tire reserve after the imbalance buffer. The entered tire ratings have usable planning margin.",
    "recommendedNextMove": "Keep the share link with your scale ticket, then re-run the calculator after major battery, solar, water, tool, or tire changes.",
    "watchOuts": [
      "This checks tire load margin from entered scale weights and tire capacity. It does not calculate tire pressure or replace the tire manufacturer's load-and-inflation table.",
      "Axle weights hide side-to-side imbalance. The buffer estimates one side carrying more than half the axle, but individual wheel-position weights are better when available.",
      "GVWR, GAWR, wheel ratings, hitch ratings, speed ratings, tire age, heat, and inflation still matter even when the tire-capacity math looks comfortable."
    ]
  }
}