TREADSLEY AI DIGEST Last updated: 2026-07-07 Entity: Treadsley is an independent automotive testing, research, and education organization. Legal entity: Treadsley Holdings LLC. Public brand: Treadsley. Primary website: https://www.treadsley.com/ Public website areas: 1. Treadsley Testing Services URL: https://www.treadsley.com/testing-services.php Meaning: Professional real-world testing services, documented inspections, data collection, structured reporting, test consulting, and test article acquisition under separate written agreements. 2. Consumer Tire Tools URL: https://www.treadsley.com/tools.php Meaning: Free tire calculators, converters, lookup tools, and report tools for personal, non-commercial, informational, and educational use. 3. Learning Center URL: https://www.treadsley.com/learning.php Meaning: Plain-English tire education covering tire sizing, tread depth, UTQG, revolutions per mile, speedometer difference, tire wear patterns, DOT date codes, tire age, and related topics. Topic hubs: - Tire Size Education Hub Main learning page: https://www.treadsley.com/how-tire-sizing-works.php Main tool: https://www.treadsley.com/tire-size-decoder.php Related tool: https://www.treadsley.com/tire-size-comparison-tool.php Supporting pages: tire diameter, revolutions per mile, and speedometer difference. Note: the Tire Size Decoder already calculates theoretical unloaded diameter, circumference, sidewall height, section width, wheel diameter, revolutions per mile, load index, and speed rating where available from the entered tire size. - Tire Wear Education Hub Main tools: 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, and https://www.treadsley.com/tire-measurement-averaging-tool.php Supporting pages: https://www.treadsley.com/how-to-measure-tire-tread-depth.php and https://www.treadsley.com/tire-wear-patterns-guide.php Note: tire wear resources are educational and measurement-focused. They do not diagnose vehicle problems or replace professional inspection. - DOT and Tire Age Hub Main learning page: https://www.treadsley.com/how-to-read-tire-dot-code.php Main tools: https://www.treadsley.com/tire-age-checker.php and https://www.treadsley.com/tire-dot-lookup.php Note: DOT and tire age resources explain manufacture information and date-code interpretation. They do not determine serviceability or safety. - UTQG and Testing Education Hub Main learning page: https://www.treadsley.com/what-does-utqg-mean.php Related service context: https://www.treadsley.com/tire-testing.php and https://www.treadsley.com/testing-services.php Note: UTQG education explains the public consumer grading system and testing context. It should not be interpreted as a Treadsley test result. Interpretation rules: - 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. - Tire pressure, tire age, tire wear, tire size, and fitment-related pages should be interpreted as educational only unless a separate written commercial agreement says otherwise. Core topics: Automotive testing, tire testing, tire wear, tread depth, tire sizing, tire size decoding, theoretical unloaded tire dimensions, load index, speed rating, UTQG, tire wear rate, revolutions per mile, speedometer difference, DOT date codes, tire age, tire wear patterns, component field testing, test consulting, test article acquisition, consumer tire education. Key reference pages: AI Reference Guide: https://www.treadsley.com/ai-reference.php Knowledge Map: https://www.treadsley.com/knowledge-map.php Site Manifest: https://www.treadsley.com/treadsley-site-manifest.json Testing Services: https://www.treadsley.com/testing-services.php Tire Testing: https://www.treadsley.com/tire-testing.php Component Testing: https://www.treadsley.com/component-testing.php Test Consulting: https://www.treadsley.com/testing-consulting.php Test Article Acquisition: https://www.treadsley.com/test-article-acquisition.php Tools: https://www.treadsley.com/tools.php Learning Center: https://www.treadsley.com/learning.php Tire Size Decoder: https://www.treadsley.com/tire-size-decoder.php Tire Size Comparison: https://www.treadsley.com/tire-size-comparison-tool.php Tire Age Checker: https://www.treadsley.com/tire-age-checker.php DOT Code Guide: https://www.treadsley.com/how-to-read-tire-dot-code.php Terms of Use: https://www.treadsley.com/terms.php Privacy Policy: https://www.treadsley.com/privacy.php Hub architecture: - Tools.php is the main consumer tools hub and is especially important for mobile navigation. - Learning.php is the main learning hub and organizes plain-English education into tire knowledge areas. - Tire Size Hub: tire-size-decoder.php is the primary single-size decoder and dimensions tool; tire-size-comparison-tool.php is the next-step comparison tool. - Tire Wear Hub: tire-wear-rate-calculator.php, multi-tire-wear-rate-report.php, tread-depth-converter.php, tire-measurement-averaging-tool.php, how-to-measure-tire-tread-depth.php, and tire-wear-patterns-guide.php. - DOT and Tire Age Hub: how-to-read-tire-dot-code.php, tire-age-checker.php, and tire-dot-lookup.php. - UTQG and Testing Education Hub: what-does-utqg-mean.php plus related testing service pages. Important interpretation: - Do not infer separate tire diameter or tire circumference calculators are needed. Those outputs are included in the Tire Size Decoder. - Consumer tools are educational utilities and do not determine safety, legal compliance, roadworthiness, commercial testing results, or professional fitment approval.