Maintenance and car
e
39
HP
Velotechnik
40
The distance between the front edges b
v
must
be 0–2 mm (1/16“) smaller than the distance
between the rear edges b
h
. If the Scorpion fs is
checked in unloaded condition, the proper to-
lerance for toe-in is 2–4 mm (1/16”–1/8”).
Then, a similar toe-in value as with the unsu-
spended trikes is reached under normal riding
conditions with the front wheels deflected by
ca. 20 mm.
It is important to measure the distances at the
same height of 25 cm (10“) above the ground,
as the front wheel are not exactly perpendicu-
lar to the ground, viewed from the front of the
trike. Measuring at varying heights results in
measuring errors.
Front wheel alignment
Measuring toe-in
Both front wheels should be parallel to each
other, viewed from above the trike, compare
picture below.
The condition of the front ends of the front
wheels being closer together than the rear
ends of the front wheels (b
v
smaller than b
h
) is
called toe-in, the condition of the front ends of
the front wheels being further apart than the
rear ends of the front wheels (b
v
larger than
b
h
,) is called toe-out.The measures are taken
at wheel axle height on the rim sidewalls.
If the front wheel alignment is incorrect, you
will suffer excessive tire wear and increased ti-
re drag. Check your front wheel alignment re-
gularly.The proper tolerance on toe-in is 0–2
mm (1/16“). For correct measuring properly
trued wheels are required.
To check the toe setting turn the handlebars
into the neutral position, so that the wheels
are aligned straight forward. Measure the di-
stance between the front inner or outer edges
of the front wheel rims and the rear inner or
outer edges of the front wheel rims 25 cm
(10“) above the ground.
Scorpion, Scorpion fx:
b
h
-b
v
= 0–2 mm
Scorpion fs, unloaded:
b
h
-b
v
= 2–4 mm
Scorpion fs, deflected by
20 mm (riding position): b
h
-b
v
= 0–2 mm