Meaning of SPACER in English
1. A component which moves two items further apart. Sometimes it is just a washer and at others it is a metal or plastic cylinder or a block of rubber or plastic.
2. A band on demountable rims which fits between two rims in dual mounting to provide clearance between the duals.
3. An obsolete circular metal plate having a bolt hole circle and center bore and fitting between the faces of disc wheels to provide additional dual clearance.
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012