What does et40 mean on rims?

Offset is stamped on a wheel as an ET value, which refers to the German phrase “Einpress Tiefe.” ET indicates the distance between the mounting surface and the geometric centre of the wheel (the symmetry axle), usually expressed in millimetres. When the ET value decreases, the alloy wheels will protrude further out.

What does ET45 mean for wheels?

ET wheel numbers can be either positive or negative to reflect the values of wheels with either positive offsets or negative offsets. For example, an ET45 wheel measurement has a positive offset of 45mm, which means that the mounting face is 45mm in front of the centre line.

What does ET10 mean on wheels?

If the offset is a positive number (e.g. ET10), the hub mounting surface is on the front-half of the wheel (generally found on front-wheel drive vehicles), however, if it is a negative number (e.g. ET-10), this means the hub mounting surface is on the back-half of the wheel.

What does ET44 mean?

“ET44” means a 44-millimeter positive offset or 44mm off center on the roadside of the rim. “ET” comes from the German word “Einpresstiefe” which means “insertion depth.”

What is the ET number on a wheel?

In practice, the ET-value is the number in millimetres that the centre line of the wheel deviates from the mounting surface (on the wheel hub). As a rule of thumb: the higher the ET, the more a wheel is positioned inwards; the lower the ET, the more a wheel protrudes outwards.

What do numbers on rims mean?

What do rim size numbers mean? This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel. The wheel size also includes its width and offset. The width is the distance from each bead seat (from inside to the outside).

How do you read wheel sizes?

Wheel width is the distance, in inches, across the barrel of the wheel. Just like wheel diameter, rim width is measured from bead seat to bead seat, rather than from the rim flange. The width of the wheel in this example is 7 inches. The most common wheel widths vary from 6″-14″.