TyreSpace

FR Tyre Marking

FR
Flange Rim Protection
A protective rib on the tyre sidewall that shields the rim from kerb damage.

A convention with no standards body behind it.

Where FR 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.

205/55R16 91V FRCONSTRUCTIONRIM DIAMETERASPECT RATIOLOAD INDEXSECTION WIDTHSPEED SYMBOLFLANGE RIM PROTECTION

FR Flange Rim Protection

A protective rib on the tyre sidewall that shields the rim from kerb damage.

Also moulded on the wall