Nowadays, the majority, the majority of PL rims, the valve is called “external”. Its position is under the rim edge to be protected from disc brakes. If your vehicle has brake calipers, the position of the valve will be different.
What is rim offset?
Offset is also called Offset / ET / Inset / HMA. It corresponds to the distance between the centre line of the rim and the hub bearing surface. The offset can be calculated from the inner side of the rim.
What is a centre-to-centre distance?
The centre distance of a rim corresponds to the distance between the centres of 2 diametrically opposed stud holes which are intended to receive the rim fixing nuts. The unit of measurement is in millimetres.
What is a central bore?
The centre bore of a rim corresponds to the hub passage in the centre of the rim. The unit of measurement is in millimetres.