Common
Wheel
Size
Setting - QIWU Technology iGS630 User Manual

11.
COMMON
WHEEL
SIZE
SETTING

11.
COMMON
WHEEL
SIZE
SETTING
Setting
wheel
size
is
a
prerequisite
for
correctly
displaying
of
cycling
information.

There
are
two
ways
to
determine
the
wheel
size
of
a
bicycle:
Way
1
Manually
measure
the
wheels
to
get
the
most
accurate
results.
Mark
the
air
faucet
as
the
point
where
the
wheel
touches
the
ground.
Draw
a

line
on
the
ground
to
mark
that
point.
The
bicycle
moves
forward
a
full
circle

on
a
flat
surface.
The
tires
should
be
perpendicular
to
the
ground.
Draw

another
line
on
the
ground
at
the
air
faucet
to
mark
a
complete
rotation
of
the

wheel.
Measure
the
distance
between
the
two
lines.
Subtract
4mm
to
calculate
the
weight
on
the
bicycle
to
get
the
circumference

of
the
wheel.
Way
2
Look
at
the
diameter
(in
inches
or
ETRTO)
printed
on
the
wheel.
Match
it
to

the
wheel
size
in
millimeters
in
the
right
column
of
the
chart.

You
can
check
on
the
Internet
and
calculate
the
size
that
is
not
included
in
this
list.

Common
Wheel
Diameter
Parameters
Wheel
Size
12×1.75
14×1.5
14×1.75
16×1.5
16×1.75
18×1.5
18×1.75
20×1.75
20×1-3/8
22×1-3/8
20×1-1/2
24×1
24×3/4Tubular
24×1-1/8
24×1-1/4
24×1.75
24×2.00
24×2.125
24
Length
(mm)
935
1020
1055
1185
1195
1340
1350
1515
1615
1770
1785
1753
1785
1795
1905
1890
1925
1965
Wheel
Size
26×1.25
26×1-1/8
26×1-3/8
26×1-1/2
26×1.40
26×1.50
26×1.75
26×1.95
26×2.00
26×2.10
26×2.125
26×2.35
26×3.00
26×1
27×1-1/8
26×1-1/4
26×1-3/8
29×2.1
Length
(mm)
1953
1970
2068
2100
2005
2010
2023
2050
2055
2068
2070
2083
2170
2145
2155
2161
2169
2288