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 About G3 ION Bindings

a.  The installation of the binding should only be performed by an  

authorized G3 dealer.

b.   The G3 ION bindings are compatible only with alpine touring ski boots 

(ISO 9523) with TECH compatible inserts.

c.  Bellowed touring boots or NTN type boots with TECH inserts are not currently 

supported; the flex creates an unpredictable release environment.

WArNING!
Using a bellowed boot with G3 ION bindings will affect the safety release of 
the boot from the binding. G3 cannot guarantee the release settings of the 
binding when used with these boots. 

MOUNTING  

INSTRUCTIONS

1.  Toe Mounting Screw 
2.  Heel Mounting Screw Retail Version
3.  Heel Mounting Screw Rental /  Demo Version
4.  Toe Assembly
5.  Brake Spring Cover
6.  Toe Mounting Plate
7.  Heel Assembly ION 10 & 12
8.  Heel Assembly ION LT12
9.  Leash Connector ION LT12 
10.  Leash ION LT12

1.

1.

2.

3.

4.

10.

9.

6.

5.

7.

8.

fig 1

7.   releAse vAlUe AdjUstmeNt

a.   The G3 ION binding has two release modes: lateral 

twisting (Mz), and forward falling (My). Choose 
an appropriate value using the selection values 
chart provided in table 2 (In accordance with ISO 
11088 / ASTM F939). 

b.  Adjust the front edge of the release setting indicator to 

the Release Values that get determined by following the 
procedure outlines in Section 8. 

Note: Turn adjuster clock-wise to increase release 
setting, and counter clock-wise to decrease setting.

8.  selectION Of releAse settING 

vAlUes (IsO 11088 /Astm f939)

determination of skier type:

a.  It is the responsibility of the skier to determine his/her 

skier-type classification as defined in table 1. 

b.  Skiers 10 years of age or older, or any type who desire 

a higher or lower setting than the setting of their skier 
type according to table 1, may do so in the following 
cases: Skiers who have satisfactory experience 
with higher or lower settings regarding these 
recommendations may request a setting based on their 
experience.

c.  Skiers who have satisfactory experience without 

inadvertent releases may request a setting up to 15% 
lower than that recommended in table 2.

d.  Skiers having certain characteristics, such as neutral 

skiing technique, defensive attitude, high degree of 
control, etc. may request a setting of 15% lower than 
that recommended in table 2.

e.  Skiers who have experienced inadvertent releases 

may request a setting up to 15% higher than that 
recommended in table 2. 

f.  Skiers may request settings that are different for lateral 

twist and forward lean. 

g.  Selection of release settings 

Locate the skier’s weight (mass) and height in the 
appropriate column in table 2. If the weight and height 
are not on the same line, select the line closest to the 
top of the table.  
Adjustment for skier type (see table 1): 
For a Type 1 skier, stay on the same line and use that 
skier code. 
For a Type 2 skier, move down the table one skier code. 
For a Type 3 skier, move down the table two skier 
codes. 
If the skier is age 9 and younger, or 50 and older, move 
up the table one skier code. 

h.  Release value determination

 

Locate the release value at the intersection of the skier 
code row and the appropriate boot sole length. If there 
is a blank box, move left or right to the in the same row 
to the next value. 

i.  The ION 10 has release values from 4-10 only. The ION 

12 and ION LT12 have release values from 5-12 only. 

Note: that release values selected using this practice may not be 
appropriate for circumstances in which: the skier carries an object 
that significantly increases the skier’s effective body weight, the 
skier grasps or in some manner controls an object such as a sled, 
or the skier encounters exceptional snow or terrain conditions not 
commonly found on developed ski slopes.  
Release torque values outside the recommendations of this practice 
may increase the risk of injury to the skier. However, skiers who are 
informed of this potential risk may request such settings and have 
them provided, subject to the guidelines and limitations specified in 
this document.These values refer to recommended release torque 
for initial adjustment of a ski binding and subsequent readjustment 
of the binding during routine maintenance or following a suspected 
malfunction. However, these values are not intended to apply to the 
condition of the equipment at anytime after it is put into use.

Forward Falling (My)

Forward Falling Indicator Window (My)

Forward Falling Indicator

Twist Indicator

Twist Indicator Window (Mz)

Lateral Twisting (Mz)

Boot Length Adjustment

2609-5746 
G3-AT2-E001 REV-A

9.  checks & fUNctIONAl tests

Upon completing installation and setting of the binding, 
the following inspection and functional checks should 
be performed:

a.  Boot center mark is aligned with the ski center mark.
b.  Install a boot in the binding, and check that the binding 

heel pins are aligned with the boot insert.

c.  Check heel location by checking the gap between boot  

and binding.

d.  Check that both lateral twisting (Mz), and forward falling 

(My) adjustments on each binding are set to the correct 
value.

e.  Check the lateral release travel by hitting the heel of 

the boot to displace it several mm and ensure that the 
binding returns to center quickly and smoothly.

f.  Verify release values with a binding test device. Follow 

the manufacturer’s instructions for Tech-pin type insert  
compatible bindings. 

10. trOUBleshOOtING

If the lateral release (Mz) is not symmetrical, check  
the following:

a.  Are boot inserts worn?
b.  Toe piece alignment with the heel. Check by installing 

boot in toe and confirm toe and heel pins align with 
tech inserts. 

c.  Dirt contamination or excessive wear of binding 

components, in particular the toe pins or heel. 

Note: Exploded view will be referenced throughout this document. For example , ‘Use the toe mounting screws (1).’

 

Skier’s Parameters

Initial Indicator Value, Z (Presetting),  

depending on boot sole length

Inspection  

Parameters

table

 

2

release

 

value

 

selection

 

using

 

skier

s

 

weight

Cautious skiing 

on smooth 

slopes of gentle 

to moderate 

pitch.

Skiers who 

designate 

themselves as 

Type 1 receive 

lower than 

average release 

settings. This 

corresponds to 

an increased risk 

of inadvertent 

binding release 

in a fall.

This type also 

applies to entry 

level skiers 

uncertain of 

their skill level.

Fast skiing 

on slopes of 

moderate to 

steep pitch.

Skiers who 

designate 

themselves as 

Type 3 receive 

higher than 

average release 

settings. This 

corresponds 

to decreased 

capacity for 

release in a fall, 

in order to gain 

a decreased risk 

of inadvertent 

binding release.

Skiers who 

designate 

themselves 

as Type 2 

receive average 

release settings 

appropriate for 

most recreational 

skiing.

Skiers that do 
not meet the 
descriptions of 
either 1 or 3

type 1

type 2

type 3

TABLE 1: DETERMINATION Of SkIER-TyPE CLASSIfICATION

retAIl versION

reNtAl versION

O

O

P

P

Q

Q

For the most current information, videos and instructions on mounting and using 
your ION bindings go to http://www.genuineguidegear.com.
For full G3 product warranty details please visit:  
http://www.genuineguidegear.com/service/g3-product-warranty.

Skier’s 

Mass 

(kg)

Skier’s 
Height 

(m)

Skier’s 

Mass

(lbs)

Skier’s 
Height

(ft in)

Skier’s 

Code

<250m

m

251 mm

to

270 mm

271 mm

to

290 mm

291 mm

to

310 mm

311 mm

to

330 mm

>331

mm

Lateral 

Twist 

(Mz)

Nm

forward 

Lean

My

Nm

5

18

10 to 13

22 to 29

A

0.75

0.75

8

29

14 to 17

30 to 38

B

1

1

0.75

11

40

18 to 21

39 to 47

C

1.5

1.25

1

14

52

22 to 25

48 to 55

D

1.75

1.5

1.5

1.25

17

64

26 to 30

56 to 66

E

2.25

2

1.75

1.5

1.5

20

75

31 to 35

67 to 78

F

2.75

2.5

2.25

2

1.75

1.75

23

87

36 to 41

79 to 91

G

3.5

3

2.75

2.5

2.25

2

27

102

42 to 48

< 1.5

92 to 107

< 4’10”

H

3.5

3

3

2.75

2.5

31

120

49 to 57

1.5 to 1.6

108 to 126

4’11 to 5’2”

I

4.5

4

3.5

3.5

3

37

141

58 to 66

1.6 to 1.7

127 to 146

5’2” to 5’5”

J

5.5

5

4.5

4

3.5

43

165

67 to 78

1.7 to 1.8

147 to 172

5’6” to 5’10”

K

6.5

6

5.5

5

4.5

50

194

79 to 94

1.8 to 1.9

173 to 208

5’ll” to 6’4”

L

7.5

7

6.5

6

5.5

58

229

95 <

2 <

209 <

6.5”<

M

8.5

8

7

6.5

67

271

N

10

9.5

8.5

8

78

320

O

11.5

11

10

9.5

91

380

P

105

452

118

540

(not to scale)

Models: ION 10, ION 12, ION LT12

D

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