Your web browser is out of date.

Update your browser for better security, speed and to get the best experience on this website.

Update your browser
You are in:

Glossary
C

Having problems with our terms and abbreviations/acronyms? Search our list of glossary terms below.

C

Centre Bore CB

The Centre Bore (CB) is the diameter of the hub spigot/locating hole in the back of the wheel. Measurement is taken by measuring the spigot or the hole from edge to edge in mm. For example, a 57.1CB means the diameter of the hub spigot is 57.1mm.

C

Chrome

Chromium plate as a protective finish, used to prevent rust.

C

CNC Machine/Machined

CNC Machine/Machined is the process of manufacturing a part by an automated, pre-programmed machine that uses written codes to perform every movement.

C

Collar

A collar reduces the size of the wheel bolt hole. This is typical when using a bolt in a Range Rover or Land Rover wheel.

C

Computer Numerical Control CNC

Computer numerical control (CNC) is a method for automating control of machine tools through the use of software embedded in a microcomputer attached to the tool. It is commonly used in manufacturing for machining metal and plastic parts.