How to Measure Tire Tread Depth
Learn how to collect multiple tread depth readings by groove and position, and why averaging produces cleaner wear-rate inputs.
Learn it
Treadsley Learning Center
Plain-English tire reference guides that explain the tools and the measurements behind them.
Tire Wear Patterns Guide
Learn common visual tread-wear pattern terms and why tire wear should be treated as a clue, not a diagnosis.
Learn itHow Tire Sizing Works
Learn how metric and flotation tire sizes describe width, aspect ratio, construction, and rim diameter.
Learn itWhat Is Tire Diameter?
Learn what tire diameter means and why it matters for speedometer behavior, gearing, and clearance.
Learn itHow Speedometer Difference Works
Learn why changing tire diameter can make the speedometer and odometer read differently.
Learn itWhat Is Revolutions Per Mile?
Learn why tire revolutions per mile changes with tire diameter and why it matters for comparisons.
Learn itWhat Does UTQG Mean?
Learn what treadwear, traction, and temperature grades mean, and what they do not prove.
Learn itNeed a calculator instead?
The learning center explains terms and measurement methods. The tools page contains calculators and converters.