Page 54 - Catalog spare parts BPW brake disc

Auto Parts / BPW-EL-TSB 31231601e Page 53
Wheel studs 6

General

Stud alignment
In stud centring, the wheel nave (with countersunk stud
holes) is centred using wheel studs with (spring) centring
rings.

Spigot alignment
In hub centring, the wheel nave is centred using a
centring spigot or ring surfaces on the wheel hub.

Centring bushes may be mounted on two opposing wheel
bolts of each hub in the case of wheels with hub centring.
This is not, however, necessary.
Centring bushes must be mounted on two opposing
wheel bolts of each hub in the case of wheels with mixed
centring.

Alloy wheels
In the case of aluminium wheels, the wheel nave is
centred using a centring cam or ring surfaces on the
wheel hub.
As the fl ange thickness is greater with alloy wheels than
with steel wheels, it is important to check whether the
axles are suitable for fi tting alloy wheels (with 26 mm-
diameter hole).
In the case of twin tyres the available centring seat and
wheel bolts must be of adequate length (i.e. the thread
of the wheel nut must be completely engaged with the
wheel bolt thread).
If not, aluminium wheels with stud hole Ø 32 can be used
in conjunction with shouldered nuts without replacing the
hub or the wheel studs.
(The wheel is not centred by the shouldered nuts).

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