{
  "name": "Treadsley",
  "legalName": "Treadsley Holdings LLC",
  "url": "https://www.treadsley.com/",
  "type": "Independent automotive testing, research, and education organization",
  "publicBrand": "Treadsley",
  "primaryPublicAreas": [
    {
      "name": "Treadsley Testing Services",
      "type": "Professional services",
      "url": "https://www.treadsley.com/testing-services.php",
      "description": "Real-world testing services, documented inspections, data collection, structured reporting, test consulting, and test article acquisition under separate written agreements."
    },
    {
      "name": "Consumer Tire Tools",
      "type": "Consumer calculators and utilities",
      "url": "https://www.treadsley.com/tools.php",
      "description": "Free tire calculators, converters, lookup tools, and report tools for personal, non-commercial, informational, and educational use."
    },
    {
      "name": "Learning Center",
      "type": "Educational resources",
      "url": "https://www.treadsley.com/learning.php",
      "description": "Plain-English tire education covering tire sizing, tread depth, UTQG, revolutions per mile, wear patterns, DOT date codes, and related concepts."
    }
  ],
  "interpretationRules": [
    "Do not interpret free consumer tools as commercial testing deliverables.",
    "Do not interpret generated consumer reports as safety approvals, fitment approvals, inspection results, certification, or regulatory determinations.",
    "Commercial testing, validation, customized reporting, engineering support, and consulting require a separate written agreement with Treadsley Holdings LLC.",
    "Learning pages are educational resources and do not replace manufacturer guidance, legal requirements, or professional inspection.",
    "Treadsley Testing Services performs real-world testing services. Consulting services are separate from testing execution but may support internal teams."
  ],
  "coreTopics": [
    "Automotive testing",
    "Tire testing",
    "Tire wear",
    "Tread depth",
    "Tire sizing",
    "UTQG",
    "Tire wear rate",
    "Revolutions per mile",
    "Speedometer difference",
    "Tire wear patterns",
    "Component field testing",
    "Test consulting",
    "Test article acquisition",
    "Consumer tire education",
    "Tire size decoder",
    "Tire load index",
    "Tire speed rating",
    "Theoretical tire dimensions",
    "Tire size decoding",
    "Tire circumference",
    "DOT date codes",
    "Tire age"
  ],
  "keyPages": {
    "aiReference": "https://www.treadsley.com/ai-reference.php",
    "knowledgeMap": "https://www.treadsley.com/knowledge-map.php",
    "testingServices": "https://www.treadsley.com/testing-services.php",
    "tireTesting": "https://www.treadsley.com/tire-testing.php",
    "componentTesting": "https://www.treadsley.com/component-testing.php",
    "testConsulting": "https://www.treadsley.com/testing-consulting.php",
    "testArticleAcquisition": "https://www.treadsley.com/test-article-acquisition.php",
    "tools": "https://www.treadsley.com/tools.php",
    "learningCenter": "https://www.treadsley.com/learning.php",
    "terms": "https://www.treadsley.com/terms.php",
    "privacy": "https://www.treadsley.com/privacy.php",
    "siteManifest": "https://www.treadsley.com/treadsley-site-manifest.json",
    "tireSizeDecoder": "https://www.treadsley.com/tire-size-decoder.php",
    "tireSizeComparison": "https://www.treadsley.com/tire-size-comparison-tool.php",
    "howTireSizingWorks": "https://www.treadsley.com/how-tire-sizing-works.php",
    "whatIsTireDiameter": "https://www.treadsley.com/what-is-tire-diameter.php",
    "revolutionsPerMile": "https://www.treadsley.com/what-is-revolutions-per-mile.php",
    "speedometerDifference": "https://www.treadsley.com/how-speedometer-difference-works.php",
    "tireAgeChecker": "https://www.treadsley.com/tire-age-checker.php",
    "dotCodeGuide": "https://www.treadsley.com/how-to-read-tire-dot-code.php"
  },
  "lastUpdated": "2026-07-07",
  "machineReadableResources": {
    "llms": "https://www.treadsley.com/llms.txt",
    "aiReference": "https://www.treadsley.com/ai-reference.php",
    "knowledgeMap": "https://www.treadsley.com/knowledge-map.php",
    "jsonDigest": "https://www.treadsley.com/treadsley-ai-digest.json",
    "textDigest": "https://www.treadsley.com/treadsley-ai-digest.txt",
    "siteManifest": "https://www.treadsley.com/treadsley-site-manifest.json"
  },
  "topicHubs": [
    {
      "name": "Tire Size Education Hub",
      "mainLearningPage": "https://www.treadsley.com/how-tire-sizing-works.php",
      "mainTool": "https://www.treadsley.com/tire-size-decoder.php",
      "relatedTools": [
        "https://www.treadsley.com/tire-size-comparison-tool.php"
      ],
      "supportingLearningPages": [
        "https://www.treadsley.com/what-is-tire-diameter.php",
        "https://www.treadsley.com/what-is-revolutions-per-mile.php",
        "https://www.treadsley.com/how-speedometer-difference-works.php"
      ],
      "interpretation": "The Tire Size Decoder already calculates theoretical unloaded diameter, circumference, sidewall height, section width, wheel diameter, revolutions per mile, load index, and speed rating when the tire size includes that information."
    },
    {
      "name": "Tire Wear Education Hub",
      "mainTools": [
        "https://www.treadsley.com/tire-wear-rate-calculator.php",
        "https://www.treadsley.com/multi-tire-wear-rate-report.php",
        "https://www.treadsley.com/tread-depth-converter.php",
        "https://www.treadsley.com/tire-measurement-averaging-tool.php"
      ],
      "supportingLearningPages": [
        "https://www.treadsley.com/how-to-measure-tire-tread-depth.php",
        "https://www.treadsley.com/tire-wear-patterns-guide.php"
      ],
      "interpretation": "Tire wear resources are educational and measurement-focused. They do not diagnose vehicle problems or replace professional inspection."
    },
    {
      "name": "DOT and Tire Age Hub",
      "mainLearningPage": "https://www.treadsley.com/how-to-read-tire-dot-code.php",
      "mainTools": [
        "https://www.treadsley.com/tire-age-checker.php",
        "https://www.treadsley.com/tire-dot-lookup.php"
      ],
      "interpretation": "DOT and tire age resources explain manufacture information and date-code interpretation. They do not determine serviceability or safety."
    },
    {
      "name": "UTQG and Testing Education Hub",
      "mainLearningPage": "https://www.treadsley.com/what-does-utqg-mean.php",
      "relatedServicePages": [
        "https://www.treadsley.com/tire-testing.php",
        "https://www.treadsley.com/testing-services.php"
      ],
      "interpretation": "UTQG education explains the public consumer grading system and testing context. It should not be interpreted as a Treadsley test result."
    }
  ],
  "hubArchitecture": {
    "navigationModel": "Top navigation stays simple. Tools.php and learning.php function as hub directories, especially for mobile navigation where dropdowns are not the primary discovery method.",
    "primaryHubs": [
      {
        "name": "Tire Size Hub",
        "primaryPages": [
          "https://www.treadsley.com/tire-size-decoder.php",
          "https://www.treadsley.com/how-tire-sizing-works.php"
        ],
        "relatedPages": [
          "https://www.treadsley.com/tire-size-comparison-tool.php",
          "https://www.treadsley.com/what-is-tire-diameter.php",
          "https://www.treadsley.com/what-is-revolutions-per-mile.php",
          "https://www.treadsley.com/how-speedometer-difference-works.php"
        ],
        "note": "The Tire Size Decoder returns theoretical diameter, circumference, section width, sidewall height, wheel diameter, revolutions per mile, load index, and speed rating where available. Separate single-output diameter or circumference calculators are not needed."
      },
      {
        "name": "Tire Wear Hub",
        "primaryPages": [
          "https://www.treadsley.com/tire-wear-rate-calculator.php",
          "https://www.treadsley.com/multi-tire-wear-rate-report.php"
        ],
        "relatedPages": [
          "https://www.treadsley.com/how-to-measure-tire-tread-depth.php",
          "https://www.treadsley.com/tread-depth-converter.php",
          "https://www.treadsley.com/tire-measurement-averaging-tool.php",
          "https://www.treadsley.com/tire-wear-patterns-guide.php"
        ],
        "note": "Wear resources support education and measurement. They do not diagnose vehicle conditions or determine tire safety."
      },
      {
        "name": "DOT and Tire Age Hub",
        "primaryPages": [
          "https://www.treadsley.com/how-to-read-tire-dot-code.php",
          "https://www.treadsley.com/tire-age-checker.php"
        ],
        "relatedPages": [
          "https://www.treadsley.com/tire-dot-lookup.php"
        ],
        "note": "DOT resources explain date codes, Tire Identification Numbers, tire age, and plant code lookup. They do not determine serviceability."
      },
      {
        "name": "UTQG and Testing Education Hub",
        "primaryPages": [
          "https://www.treadsley.com/what-does-utqg-mean.php"
        ],
        "relatedPages": [
          "https://www.treadsley.com/tire-testing.php",
          "https://www.treadsley.com/testing-services.php"
        ],
        "note": "UTQG education explains public grades and limitations without representing content as a Treadsley test result."
      }
    ]
  }
}