Keyboard access
Interactive controls use named buttons, links and form fields. Focus is visible. Dialogs can be closed with their controls and Escape, and return focus to the action that opened them. Forms associate error messages with the relevant fields so a correction can be made without relying on color.
Read the data without the diagram
The visual tire and wheel diagrams are accompanied by text values and an equivalent table. Original and New remain labeled independently of color. A chart is not the only way to obtain the calculation.
Adapt the display
The layout reflows for smaller screens, supports light and dark themes, and respects reduced-motion preferences. Browser zoom remains available. Wide data tables may use an explicitly scrollable region rather than shrinking text below a readable size.
Use the format that fits your needs
CSV exposes a structured calculation table and SVG includes textual labels. PDF reports are designed for readable printing. PDF accessibility can vary by reader and is not presented as a certified PDF/UA document; use the HTML result or CSV when it better suits your workflow.
Ongoing checks and known limits
This statement describes the controls and available alternatives; it does not claim an independent accessibility certification. Email support@tirespan.site with the page, browser, assistive technology and steps involved in an accessibility problem. The documentation also explains the main workflows.