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You need to measure a rim properly. It must fit perfectly so that your tires are always protected. So make sure you have a few tools to hand
Measure the rim: You should pay attention to this
To measure a rim correctly, you need a few basic tools and knowledge.
- Diameter: The diameter of a rim is measured in inches and is the most important measurement. Place a tape measure or folding rule over the center of the rim and measure the distance from one outer rim edge to the other outer rim edge. This is the diameter of the rim.
- Width: The width of a rim is also measured in inches and is the distance between the two outer rim edges. Place the tape measure or folding rule flat on the rim and measure this distance.
- Offset (ET): The offset is the distance between the mounting surface of the rim and the center of the rim, measured in millimeters. This value is important to ensure that the rim fits correctly on the vehicle.
Hole circle and co.: How to take further measurements
Measure the bolt circle and the hub bore in a similar way. The dimensions will help you if you want to repair your rims, for example.
- Pitch circle: The pitch circle of a rim indicates how many holes there are on the mounting surface of the rim and how far apart they are. Measure the distance between the opposite holes in millimeters to determine the bolt circle.
- Hub bore: The hub bore is the diameter of the hole in the center of the rim through which the wheel hub of the vehicle fits. Measure this diameter in millimeters to ensure that the hub bore fits the wheel hub of your vehicle
