About

This is a reference site on Reading e-bike tire sidewalls and caring for the tires: what the size codes, pressure ratings and arrows mean, tube and valve types, how punctures happen and how a tube is patched or swapped, as set out in tire makers' technical pages, standards bodies and bike makers' manuals, kept deliberately narrow.

Facts on these pages come from published sources, such as makers' documentation, official pages and reference works, and each page links to the ones it used. Every page shows when it was last checked.

There are no ads here, and nothing is for sale.

What you read here is general information. Your own equipment's manual comes first, and where safety or the law calls for a qualified tradesperson, use one.