BSW Tyre Marking

BSW

Black Sidewall

A convention with no standards body behind it.

Where BSW is on the tyre

Lettered markings read as the tail of the size string, moulded right after the speed symbol. Here it is on an example tyre.

BSW Black Sidewall

Black Sidewall. Moulded on the wall after the size, in the same lettering.

TyreCalculator — Tyre Size Calculator & Comparison Enter a tyre size such as 265/65R17 to see its section width, profile, sidewall height, rim diameter, overall diameter, circumference and revolutions per kilometre. Add a second size to compare the two and check whether the swap fits, including the diameter difference, speedometer error and ground-clearance change. This tool needs JavaScript enabled.