ICON Health & Fitness NordicTrack GX 3.9 SPORT User manual

Model No. NTEX03917.0
Serial No.
Write the serial number in the space
above for reference.
CAUTION
Read all precautions and
instructions in this manual before
using this equipment. Keep this
manual for future reference.
Serial
Number
Decal
USER’S MANUAL
nordictrack.com
To register your product and
activate your warranty today,
go to my.nordictrack.com.
For service at any time, go to
nordictrackservice.com.
Or call 1-800-TO-BE-FIT
(1-800-862-3348)
Mon.–Fri. 6 a.m.–6 p.m. MT
Sat. 8 a.m.–12 p.m. MT
Please do not contact the store.
ACTIVATE YOUR
WARRANTY
CUSTOMER CARE

2
WARNING DECAL PLACEMENT
WARNING DECAL PLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
IMPORTANT PRECAUTIONS..................................................................3
BEFORE YOU BEGIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
HOW TO USE THE EXERCISE BIKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
FCC INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
EXERCISE GUIDELINES ....................................................................15
PART LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
EXPLODED DRAWING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
ORDERING REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
LIMITED WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
TABLE OF CONTENTS
NORDICTRACK is a registered trademark of ICON Health & Fitness, Inc.
This drawing shows the location(s) of the warning decal(s). If a decal is missing or illegible, see the
front cover of this manual and request a free replacement decal. Apply the decal in the location
shown. Note: The decal(s) may not be shown at actual size.

3
IMPORTANT PRECAUTIONS
WARNING: To reduce the risk of serious injury, read all important precautions and
instructions in this manual and all warnings on your exercise bike before using your exercise bike.
ICON assumes no responsibility for personal injury or property damage sustained by or through the
use of this product.
1. It is the responsibility of the owner to
ensure that all users of the exercise bike are
adequately informed of all precautions.
2. Before beginning any exercise program,
consult your physician. This is especially
important for persons over age 35 or per-
sons with pre-existing health problems.
3. The exercise bike is not intended for use by
persons with reduced physical, sensory, or
mental capabilities or lack of experience and
knowledge, unless they are given supervi-
sion or instruction about use of the exercise
bike by someone responsible for their safety.
4. Use the exercise bike only as described in
this manual.
5. The exercise bike is intended for home use
only. Do not use the exercise bike in a com-
mercial, rental, or institutional setting.
6. Keep the exercise bike indoors, away from
moisture and dust. Do not put the exercise
bike in a garage or covered patio, or near
water.
7. Place the exercise bike on a level surface,
with a mat beneath it to protect the floor or
carpet. Make sure that there is at least 2 ft.
(0.6 m) of clearance around the exercise bike.
8. Inspect and properly tighten all parts each
time the exercise bike is used. Replace any
worn parts immediately.
9. Keep children under age 13 and pets away
from the exercise bike at all times.
10. Wear appropriate clothes while exercising;
do not wear loose clothes that could become
caught on the exercise bike. Always wear
athletic shoes for foot protection.
11. The exercise bike should not be used
by persons weighing more than 250 lbs.
(113 kg).
12. Be careful when mounting and dismounting
the exercise bike.
13. Always keep your back straight while using
the exercise bike; do not arch your back.
14. The exercise bike does not have a freewheel;
the pedals will continue to move until the
flywheel stops. Reduce your pedaling speed
in a controlled way.
15. To stop the flywheel quickly, press the
resistance knob downward.
16. When the exercise bike is not in use, tighten
the resistance knob completely to prevent
the flywheel from moving.
17. To avoid damaging the brake pads, do not
lubricate the brake pads.
18. Over exercising may result in serious injury
or death. If you feel faint, if you become short
of breath, or if you experience pain while
exercising, stop immediately and cool down.

4
STANDARD SERVICE PLANS

5
Thank you for selecting the new NORDICTRACK®
GX 3.9 SPORT exercise bike. Cycling is an effective
exercise for increasing cardiovascular fitness, building
endurance, and toning the body. The GX 3.9 SPORT
exercise bike provides a selection of features designed
to make your workouts at home more effective and
enjoyable.
For your benefit, read this manual carefully before
you use the exercise bike. If you have questions after
reading this manual, please see the front cover of this
manual. To help us assist you, note the product model
number and serial number before contacting us. The
model number and the location of the serial number
decal are shown on the front cover of this manual.
Before reading further, please familiarize yourself with
the parts that are labeled in the drawing below.
Resistance Knob
Saddle
Adjustment Knobs
Adjustment Knob
Pedal/Strap
Leveling Foot
Leveling Foot
Handlebar
Console
BEFORE YOU BEGIN
Wheel
Length: 3 ft. 9 in. (114 cm)
Width: 1 ft. 8 in. (51 cm)

6
1
• Assembly requires two persons.
• Place all parts in a cleared area and remove the
packing materials. Do not dispose of the packing
materials until you nish all assembly steps.
• Left parts are marked “L” or “Left” and right parts
are marked “R” or “Right.”
• In addition to the included tool(s), assembly
requires the following tool(s):
one adjustable wrench
one rubber mallet
Assembly may be easier if you have a set of
wrenches. To avoid damaging parts, do not use
power tools.
ASSEMBLY
2. If there are shipping tubes (not shown) attached
to the front and rear of the Frame (1), remove
and discard the shipping tubes and the hardware
attaching them.
Orient the Front Stabilizer (4) as shown.
Attach the Front Stabilizer (4) to the Frame (1)
with two M8 x 55mm Carriage Bolts (9), two M8
Washers (3), and two M8 Flange Nuts (2).
2
2
9
3
4
1
1. Go to my.nordictrack.com on your computer
and register your product.
• documents your ownership
• activates your warranty
• ensures priority customer support if assistance
is ever needed
Note: If you do not have internet access, call
Customer Care (see the front cover of this
manual) and register your product.

7
2
9
3
5
1
3
3. Attach the Rear Stabilizer (5) to the Frame (1)
with two M8 x 55mm Carriage Bolts (9), two M8
Washers (3), and two M8 Flange Nuts (2).
4
4. Orient the Saddle (31) as shown.
Slide the Saddle (31) onto the Saddle Carriage
(32); make sure that the Saddle is level and is
pointing straight ahead. Then, tighten the two
nuts (A) beneath the Saddle. 32
A
31

8
5
15
7
1
5. Orient the Handlebar (7) as shown.
Locate the Adjustment Knob (15) on the front of
the Frame (1). Loosen the Adjustment Knob and
pull it outward. Then, insert the Handlebar (7)
into the Frame.
Move the Handlebar (7) upward or downward
to the desired position, release the Adjustment
Knob (15) into an adjustment hole in the
Handlebar, and then tighten the Adjustment
Knob. Make sure that the Adjustment Knob is
firmly engaged in an adjustment hole.
6. Identify the Right Pedal (11).
Using an adjustable wrench, firmly tighten the
Right Pedal (11) clockwise into the Right Crank
Arm (49).
Firmly tighten the Left Pedal (not shown)
counterclockwise into the Left Crank Arm
(not shown). IMPORTANT: You must turn the
Left Pedal counterclockwise to attach it.
11
6
49

9
8
58
10
7
8. Slide the Console (58) onto the Console
Bracket (10) on the Handlebar (7).
7. The Console (58) can use two AAA batteries (not
included); alkaline batteries are recommended.
Do not use old and new batteries together or
alkaline, standard, and rechargeable batter-
ies together. IMPORTANT: If the Console has
been exposed to cold temperatures, allow
it to warm to room temperature before you
insert batteries. Otherwise, you may damage
the console displays or other electronic com-
ponents. Remove the battery cover, and insert
the batteries into the battery compartment (B).
Make sure to orient the batteries as shown by
the diagram inside the battery compartment.
Then, reattach the battery cover.
7
58
B

10
9
10
9. Hold the wire (C) on the Reed Switch (59) on the
left side of the exercise bike as shown.
Connect the wire (C) on the Reed Switch (59) to
the wire on the Console (58).
10. Insert the wire (C) on the Reed Switch (59) into
the Clip (64) on the left side of the Frame (1).
Next, insert the Reed Switch (59) into the Clamp
(30) on the Frame (1).
Then, rotate the Flywheel (37) so that the
Magnet (20) is facing the Reed Switch (59).
See the inset drawing. Move the Reed Switch
(59) so that it is 1/2" (1–2 cm) away from the
Magnet (20).
11. After the exercise bike is assembled, inspect it to make sure that it is assembled correctly and that it
functions properly. Make sure that all parts are properly tightened before you use the exercise bike.
Extra parts may be included. Place a mat under the exercise bike to protect the floor.
58
59
C
64
C
37
1
59 20
30 20
59

11
HOW TO ADJUST THE ANGLE OF THE SADDLE
You can adjust the angle of the saddle to the position
that is most comfortable. You can also slide the saddle
forward or backward to increase your comfort or to
adjust the distance to the handlebar.
To adjust the saddle,
loosen the nuts (A)
on the saddle clamp
a few turns, and then
tilt the saddle upward
or downward or slide
the saddle forward
or backward to the
desired position.
Then, retighten the
nuts.
HOW TO LEVEL THE EXERCISE BIKE
If the exercise bike rocks slightly on your floor during
use, turn one or both of the leveling feet on the front
and rear stabilizers (see the drawing on page 5)
until the rocking motion is eliminated.
HOW TO ADJUST THE HORIZONTAL POSITION OF
THE SADDLE
To adjust the position
of the saddle, first
loosen the adjust-
ment knob (B) and
pull it downward.
Then, move the
saddle forward or
backward, release
the adjustment knob
into an adjustment
hole in the saddle
carriage, and firmly
tighten the adjustment knob. Make sure that the
adjustment knob is engaged in an adjustment hole.
HOW TO ADJUST THE SADDLE POST
For effective exercise, the saddle should be at the
proper height. As you pedal, there should be a slight
bend in your knees when the pedals are in the lowest
position.
To adjust the height
of the saddle post,
first loosen the
adjustment knob
(C) and pull it out-
ward. Then, move
the saddle post
upward or downward,
release the adjust-
ment knob into an
adjustment hole in
the saddle post, and
firmly tighten the adjustment knob. Make sure that the
adjustment knob is engaged in an adjustment hole.
HOW TO ADJUST THE HANDLEBAR
To adjust the height
of the handlebar, first
loosen the adjust-
ment knob (D) and
pull it outward. Then,
move the handlebar
upward or downward,
release the adjust-
ment knob into an
adjustment hole in
the handlebar, and firmly tighten the adjustment knob.
Make sure that the adjustment knob is engaged in
an adjustment hole.
A
B
C
D
HOW TO USE THE EXERCISE BIKE

12
HOW TO ADJUST THE PEDALING RESISTANCE
To increase the
resistance of the
pedals, turn the
resistance knob
(E) clockwise; to
decrease the resis-
tance, turn the
resistance knob
counterclockwise.
To stop the flywheel, push the resistance knob
downward. The flywheel should quickly come to a
complete stop.
IMPORTANT: When the exercise bike is not in use,
tighten the resistance knob completely.
HOW TO MAINTAIN THE EXERCISE BIKE
Regular maintenance is important for optimal
performance and to reduce wear. Inspect and properly
tighten all parts each time the exercise bike is used.
Replace any worn parts immediately.
To clean the exercise bike, use a damp cloth and a
small amount of mild detergent. IMPORTANT: To
avoid damage to the console, keep liquids away
from the console and keep the console out of
direct sunlight.
HOW TO TROUBLESHOOT THE CONSOLE
If the console display becomes dim, replace the
batteries (see assembly step 7 on page 9); most
console problems are the result of low batteries.
HOW TO ADJUST THE REED SWITCH
If the console does not display correct feedback, the
reed switch should be adjusted.
To adjust the reed switch, see assembly step 10
on page 10. Slide the Reed Switch (59) slightly
closer to or away from the Magnet (20). Then, turn the
Flywheel (37) for a moment.
Repeat these actions until the console displays correct
feedback.
E

13
FEATURES OF THE CONSOLE
The easy-to-use console features six modes that
provide instant exercise feedback during your
workouts.
Scan (SCAN)—This mode displays the time, speed,
distance, calories, and odometer modes, for a few
seconds each, in a repeating cycle.
Time (TIME)—This mode displays the elapsed time.
Note: If you set a time goal (see step 2 on this page),
this display will show the time remaining in your
workout.
Speed (SPEED)—This mode displays your pedaling
speed, in kilometers per hour.
Distance (DIS)—This mode displays the distance that
you have pedaled during your workout, in kilometers.
Note: If you set a distance goal (see step 2 on this
page), this display will show the distance remaining in
your workout.
Calories (CAL)—This mode displays the approximate
number of calories you have burned during your work-
out. Note: If you set a calorie-burning goal (see step
2 on this page), this display will show the number of
calories yet to be burned in your workout.
Odometer (ODO)—This mode displays the total
distance, in kilometers, that has been pedaled since
the odometer was last reset. Note: To reset the
odometer, remove the batteries from the console and
then reinsert them.
HOW TO USE THE CONSOLE
Make sure that batteries (not included) are installed
in the console (see assembly step 7 on page 9). If
there is a sheet of plastic on the console, remove the
plastic.
1. Turn on the console.
To turn on the console, press any button on the
console or simply begin pedaling.
2. Set a workout goal if desired.
To set a time, distance, or calorie-burning goal for
your workout, press the Mode button repeatedly
until the word TIME, DIS, or CAL appears in the
display. Make sure that the word SCAN does not
appear in the display.
Next, press the Set button repeatedly to set a goal.
To set a goal quickly, hold down the Set button. To
reset the goal, press and hold the Mode button until
zeros appear in the display.
3. Begin pedaling and follow your progress with
the display.
Scan mode—To select the scan mode, press
the Mode button repeatedly until the word SCAN
appears in the display.
Time, speed, distance, calories, or odometer
mode—To select one of these modes for continu-
ous display, press the Mode button repeatedly
until the name of the desired mode appears in the
display. Make sure that the word SCAN does not
appear in the display.
As you exercise, the console will provide instant
feedback about your workout.
When a workout goal is not set, an upward-
pointing arrow will appear in the display when the
time, distance, or calories mode is selected. When
a workout goal is set, a downward-pointing arrow
will appear in the display when the time, distance,
or calories mode is selected.
If you have set a workout goal, the display will
count down and show zeros when you reach your
goal; if you continue to exercise, the display will
begin to count upward.
4. When you are finished exercising, the console
will turn off automatically.
If the pedals do not move for a few seconds, the
console will pause.
The console has an auto-off feature. If the ped-
als do not move and the console buttons are not
pressed for a few minutes, the power will turn off
automatically to save the batteries.

14
FCC INFORMATION
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC CAUTION: To assure continued compliance, use only shielded interface cables when connecting to
computer or peripheral devices. Changes or modifications not expressly approved by the party respon-
sible for compliance could void the user’s authority to operate this equipment.

15
These guidelines will help you to plan your exercise
program. For detailed exercise information, obtain a
reputable book or consult your physician. Remember,
proper nutrition and adequate rest are essential for
successful results.
EXERCISE INTENSITY
Whether your goal is to burn fat or to strengthen your
cardiovascular system, exercising at the proper inten-
sity is the key to achieving results. You can use your
heart rate as a guide to find the proper intensity level.
The chart below shows recommended heart rates for
fat burning and aerobic exercise.
To find the proper intensity level, find your age at the
bottom of the chart (ages are rounded off to the near-
est ten years). The three numbers listed above your
age define your “training zone.” The lowest number is
the heart rate for fat burning, the middle number is the
heart rate for maximum fat burning, and the highest
number is the heart rate for aerobic exercise.
Burning Fat—To burn fat effectively, you must exer-
cise at a low intensity level for a sustained period of
time. During the first few minutes of exercise, your
body uses carbohydrate calories for energy. Only after
the first few minutes of exercise does your body begin
to use stored fat calories for energy. If your goal is to
burn fat, adjust the intensity of your exercise until your
heart rate is near the lowest number in your training
zone. For maximum fat burning, exercise with your
heart rate near the middle number in your training
zone.
Aerobic Exercise—If your goal is to strengthen your
cardiovascular system, you must perform aerobic
exercise, which is activity that requires large amounts
of oxygen for prolonged periods of time. For aerobic
exercise, adjust the intensity of your exercise until your
heart rate is near the highest number in your training
zone.
HOW TO MEASURE YOUR HEART RATE
To measure your heart
rate, exercise for at least
four minutes. Then, stop
exercising and place
two fingers on your wrist
as shown. Take a six-
second heartbeat count,
and multiply the result
by 10 to find your heart
rate. For example, if your six-second heartbeat count is
14, your heart rate is 140 beats per minute.
WORKOUT GUIDELINES
Warming Up—Start with 5 to 10 minutes of stretch-
ing and light exercise. A warm-up increases your body
temperature, heart rate, and circulation in preparation
for exercise.
Training Zone Exercise—Exercise for 20 to 30 min-
utes with your heart rate in your training zone. (During
the first few weeks of your exercise program, do not
keep your heart rate in your training zone for longer
than 20 minutes.) Breathe regularly and deeply as you
exercise; never hold your breath.
Cooling Down—Finish with 5 to 10 minutes of stretch-
ing. Stretching increases the flexibility of your muscles
and helps to prevent post-exercise problems.
EXERCISE FREQUENCY
To maintain or improve your condition, complete three
workouts each week, with at least one day of rest
between workouts. After a few months of regular exer-
cise, you may complete up to five workouts each week,
if desired. Remember, the key to success is to make
exercise a regular and enjoyable part of your everyday
life.
WARNING: Before beginning this
or any exercise program, consult your physi-
cian. This is especially important for persons
over age 35 or persons with pre-existing
health problems.
EXERCISE GUIDELINES

16
SUGGESTED STRETCHES
The correct form for several basic stretches is shown at the right. Move slowly as you stretch; never bounce.
1. Toe Touch Stretch
Stand with your knees bent slightly and slowly bend forward from
your hips. Allow your back and shoulders to relax as you reach down
toward your toes as far as possible. Hold for 15 counts, then relax.
Repeat 3 times. Stretches: Hamstrings, back of knees and back.
2. Hamstring Stretch
Sit with one leg extended. Bring the sole of the opposite foot toward
you and rest it against the inner thigh of your extended leg. Reach
toward your toes as far as possible. Hold for 15 counts, then relax.
Repeat 3 times for each leg. Stretches: Hamstrings, lower back and
groin.
3. Calf/Achilles Stretch
With one leg in front of the other, reach forward and place your hands
against a wall. Keep your back leg straight and your back foot flat on
the floor. Bend your front leg, lean forward and move your hips toward
the wall. Hold for 15 counts, then relax. Repeat 3 times for each leg.
To cause further stretching of the achilles tendons, bend your back
leg as well. Stretches: Calves, achilles tendons and ankles.
4. Quadriceps Stretch
With one hand against a wall for balance, reach back and grasp one
foot with your other hand. Bring your heel as close to your buttocks as
possible. Hold for 15 counts, then relax. Repeat 3 times for each leg.
Stretches: Quadriceps and hip muscles.
5. Inner Thigh Stretch
Sit with the soles of your feet together and your knees outward.
Pull your feet toward your groin area as far as possible. Hold for 15
counts, then relax. Repeat 3 times. Stretches: Quadriceps and hip
muscles.
1
2
3
4
5

17
NOTES

18
1 1 Frame
2 4 M8 Flange Nut
3 10 M8 Washer
4 1 Front Stabilizer
5 1 Rear Stabilizer
6 1 Saddle Post
7 1 Handlebar
8 1 Water Bottle Holder
9 4 M8 x 55mm Carriage Bolt
10 1 Console Bracket
11 1 Right Pedal
12 1 Left Pedal
13 2 M10 Flange Nut
14 10 #8 x 20mm Screw
15 3 Adjustment Knob
16 1 Brake Pad Assembly
17 2 M5 Locknut
18 4 M5 Washer
19 2 M5 x 30mm Bolt
20 1 Magnet
21 1 Brake Bracket
22 2 M10 Washer
23 1 Brake Cover
24 1 Resistance Knob
25 2 Carriage Sleeve
26 1 Spring
27 1 Square Spacer
28 1 Resistance Spacer
29 1 Carriage Cap
30 1 Clamp
31 1 Saddle
32 1 Saddle Carriage
33 1 3/8" Nut
34 1 Drive Pulley
35 1 Crank
36 1 Axle
37 1 Flywheel
38 9 #10 x 12mm Screw
39 1 Outer Guard
40 1 Drive Belt
41 1 Drive Belt Guard Cover
42 1 Inner Guard
43 1 #12 x 15mm Screw
44 1 Brake Bracket Pad
45 2 Crank Cap
46 2 M8 x 16mm Screw
47 1 Left Crank Arm
48 2 Crank Bearing
49 1 Right Crank Arm/Sprocket
50 2 M6 x 40mm Bolt
51 2 Frame Sleeve
52 2 Wheel
53 2 M6 Locknut
54 2 M8 Nut
55 4 Leveling Foot
56 2 M8 x 55mm Bolt
57 4 3/8" Nut
58 1 Console
59 1 Reed Switch/Wire
60 1 M5 x 12mm Screw
61 1 Brake Cover Spacer
62 4 M6 Washer
63 1 Console Bracket Screw
64 1 Clip
65 2 Snap Ring
66 2 M12 Jam Nut
67 1 Axle Spacer
68 2 Flywheel Bearing
69 2 M12 Large Washer
70 6 M8 x 20mm Screw
71 2 M8 x 10mm Screw
72 6 M8 Locknut
* – Assembly Tool
* – User’s Manual
Key No. Qty. Description Key No. Qty. Description
PART LIST Model No. NTEX03917.0 R0118A
Note: Specications are subject to change without notice. For information about ordering replacement parts, see
the back cover of this manual. *These parts are not illustrated.

19
EXPLODED DRAWING Model No. NTEX03917.0 R0118A
1
3
8
12
5
2
911
15
15
34
38
38
38
38
38
38
39
35
40
14
14
14
41
43
46
46
45
45
42
47
49
54
56
55
57
20
14
30
48
48
65
65
7
51
14
3
3
3
62
62
3
2
450
52
72
53
9
16
18
18 18
18
19
17
14
21
26
28
27
33
44
14
61
14
23
24
6
15
25
32
25
29
31
51
60
64
13
13
22
22
36
37
66
67
68
68
69
66
10 58
59
63
70
70
71
72