How does borbet stamp the offset on their wheels?

[brosher]

Does anyone know how borbet stamps their wheels? I see a 20 all by itself, does that mean offset is 20?

Thanks for the help.

[brosher]

The answer is apparently yes!

[Jon K]

Yeah basically you will see either the number alone or ET 20

[BMWCCA1]

You could always simply measure it to be sure. Some manufacturers use one casting and machine the backs to desired offset so the offset is not cast in. Some stamp, some don't. Measure is easy: half the rim width, subtracted from the depth from the mounting surface to the inside rim edge. I'll let you figure out if it's negative or positive. Of course you already knew this.