ENDURANCE SERIES MAGNETIC
RECUMBENT BIKE
SF-RB421004
USER MANUAL
IMPORTANT! Please retain owner’s manual for maintenance and adjustment instructions. Your
satisfaction is very important to us, PLEASE DO NOT RETURN UNTIL YOU HAVE
CONTACTED US: support@sunnyhealthfitness.com or 1- 877 - 90SUNNY (877-907-8669).
1
IMPORTANT SAFETY INFORMATION
We thank you for choosing our product. To ensure your safety and health, please use this
equipment correctly. It is important to read this entire manual before assembling and using the
equipment. Safe and effective use can only be achieved if the equipment is assembled,
maintained, and used properly. It is your responsibility to ensure that all users of the equipment
are informed of all warnings and precautions.
1. Before starting any exercise program, you should consult your physician to determine if you
have any medical or physical conditions that could put your health and safety at risk or prevent
you from using the equipment properly. Your physician’s advice is essential if you are taking
medication that affects your heart rate, blood pressure, or cholesterol level.
2. Be aware of your body’s signals. Incorrect or excessive exercise can damage your health.
Stop exercising if you experience any of the following symptoms: pain, tightness in your chest,
irregular heartbeat, shortness of breath, lightheadedness, dizziness, or feelings of nausea. If
you do experience any of these conditions, you should consult your physician before
continuing with your exercise program.
3. Keep children and pets away from the equipment. The equipment is designed for adult use
only.
4. Use the equipment on a solid, flat level surface with a protective cover for your floor or carpet.
To ensure safety, the equipment should have at least 2 feet (60 CM) of free space all around it.
5. Ensure that all nuts and bolts are securely tightened before using the equipment. The safety of
the equipment can only be maintained if it is regularly examined for damage and/or wear and
tear.
6. Always use the equipment as indicated. If you find any defective components while
assembling or checking the equipment, or if you hear any unusual noises coming from the
equipment during exercise, discontinue use of the equipment immediately and do not use until
the problem has been rectified.
7. Wear suitable clothing while using the equipment. Avoid wearing loose clothing that may
become entangled in the equipment.
8. Do not place fingers or objects into the moving parts of the equipment.
9. The maximum weight capacity of this unit is 240 pounds (110 KG).
10. The equipment is not suitable for therapeutic use.
11. To avoid bodily injury and/or damage to the product or property, proper lifting and moving are
required.
12. Your product is intended for use in cool and dry conditions. You should avoid storage in
extreme cold, hot or damp areas as this may lead to corrosion and other related problems.
13. This equipment is designed for indoor and home use only; it is not intended for commercial
use.
2
PRE-ASSEMBLY CHECK LIST
Before you start to assemble, please make sure all parts are included.
A921002-1
Hardware Package
#16 M8*20*S5 4PCS #22 D8*16 4PCS
#52 M6*45*20 4PCS #53 D6*φ12 4PCS
#48 D6 4PCS
#7 M8*16*S5 6PCS #6 D8 6PCS
#22 D8*16 6PCS
STEP 3
STEP 4
STEP 5
TOOL
#A S13-14-15 1PC #B S5 1PC
26
99
51
9
ENDU RANCE SERIES M AGN ETIC
RECU M BENT BIKE
SF -R B 421004
USER MANUAL
THANK YOU
FOR YOUR ORDER
18
28
54
34
50
3
39
1
27L/R
C D E
HARDWARE PACKAGE
No. Description Spec. Qty.
No. Description Spec. Qty.
1 Computer 1 39 Adjustment Handle 1
3 Mid Handlebar 1 50 Saddle 1
9 Handlebar Post 1 51 Backrest Cushion 1
18 Front Stabilizer 1 54 Rear Handlebar 1
26 Main Frame 1 C Hardware Package 1
27L/R Pedal 2 D Manual 1
28 Rear Stabilizer 1 E Thank You Card 1
34 Backrest Frame 1
3
HARDWARE PACKAGE
Ordering Replacement Parts (U.S. and Canadian Customers only)
Please provide the following information in order for us to accurately identify the part(s) needed:
The model number (found on cover of manual)
The product name (found on cover of manual)
The part number found on the “EXPLODED DIAGRAM” and “PARTS LIST” (found near the end
of the manual)
Please contact us at support@sunnyhealthfitness.com or 1- 877 - 90SUNNY (877-907-8669).
4
ASSEMBLY INSTRUCTIONS
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at support@sunnyhealthfitness.com or 1-877-90SUNNY
(877-907-8669).
24
18
17
25
28
24
17
25
26
25
17
24
24
25
17
#A S13-14-15 1PC
#24 M8*60 4PCS
#17 D8*R30 4PCS
#25 M8*H16*S13 4PCS
27L
27R
A
A
87
99
STEP 1:
Remove 4 Bolts (No. 24), 4 Arc Washers
(No. 17), 4 Cap Nuts (No. 25) and Rear
Shipping Tube (No. 99) from the Front
Stabilizer (No. 18) and Main Frame (No.
26) by Spanner (No. A).
Attach the Front Stabilizer (No. 18) and
Rear Stabilizer (No. 28) to the Main
Frame (No. 26) using 4 Bolts (No. 24), 4
Arc Washers (No. 17) and 4 Cap Nuts
(No. 25) that were removed. Tighten and
secured with Spanner (No. A).
Connect the Left & Right Pedals (No.
27L/R) onto Crank (No. 87). Tighten and
secured with Spanner (No. A).
Left Pedal: Align the Left Pedal (No. 27L)
with the left side of Crank (No. 87) at 90
degrees and gently insert the pedal into
the crank arm. Turn the pedal
counter-clockwise
as tightly as you can
with your hand. Secure with Spanner (No.
A).
Right Pedal: Align the Right Pedal (No.
27R) with the right side of Crank (No. 87)
at 90 degrees and gently insert the pedal
into the crank arm. Turn the pedal
clockwise as tightly as you can with your
hand. Secure with Spanner (No. A).
5
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at support@sunnyhealthfitness.com or 1-877-90SUNNY
(877-907-8669).
26
31
33
6
22
33
6
22
34
39
47
48
49
22
6
33
22
6
33
47
48
49
A
#33 M8*45*S5 4PCS
#6 D8 4PCS
#22 D8*16 4PCS
#49 D6*R16 2PCS
#48 D6 2PCS
#47 M6*20*S5 2PCS
#B S5 1PC
50
34
22
16
22
16
22
16
22
16
#22 D8*16 4PCS
#16 M8*20*S5 4PCS
#B S5 1PC
STEP 2:
Remove 4 Bolts (No. 33), 4 Spring
Washers (No. 6) and 4 Washers (No. 22)
from Main Frame (No. 26) by Allen
Wrench (No. B).
Put Backrest Frame (No. 34) in Rail (No.
31).
Fix Rail (No. 31) to the Main Frame (No.
26) using 4 Bolts (No. 33), 4 Spring
Washers (No. 6) and 4 Washers (No. 22)
that were removed by Allen Wrench (No.
B).
Remove 2 Bolts (No. 47), 2 Spring
Washers (No. 48) and 2 Arc Washer (No.
49) from Adjustment Handle (No. 39) by
Allen Wrench (No. B).
Attach the Adjustment Handle (No. 39) to
Backrest Frame (No. 34) using 2 Bolts
(No. 47), 2 Spring Washers (No. 48) and
2 Arc Washer (No. 49) that were removed
by Allen Wrench (No. B).
STEP 3:
Tighten and secure Saddle (No. 50) to
Backrest Frame (No. 34) with 4 Bolts
(No. 16) and 4 Washers (No. 22) by Allen
Wrench (No. B).
6
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at support@sunnyhealthfitness.com or 1-877-90SUNNY
(877-907-8669).
56
22
59
79
51
52
48
53
57
58
59
22
58
#22 D8*16 2PCS
#59 M8*S13 2PCS
#52 M6*45*20 4PCS
#53 D6*φ12 4PCS
#58 M8*47 2PCS
#48 D6 4PCS
#A S13-14-15 1PC
B
54
34
56
79
10
11
9
12A
78
61
79
26
12
78
10
11
79
61
C D
E
6
22
6
22
6
22
#6 D8 6PCS
#22 D8*16 6PCS
#7 M8*16*S5 6PCS
#B S5 1PC
7
7
7
12
STEP 4:
Remove 2 Bolts (No. 58), 2 Washers
(No. 22), 2 Tapered Cap Nuts (No. 59)
and Handlebar Cover Plate (No. 57)
from Rear Handlebar (No. 54) by
Spanner (No. A).
Attach Rear Handlebar (No. 54) to
Backrest Frame (No. 34) with 2 Bolts
(No. 58), 2 Washers (No. 22), 2 Tapered
Cap Nuts (No. 59) and Handlebar Cover
Plate (No. 57)
that were removed by
Spanner (No. A).
Attach Backrest Cushion (No. 51) to
Backrest Frame (No. 34) with 4 Bolts
(No. 52), 4 Spring Washers (No. 48) and
4 Washers (No. 53) by Spanner (No. A).
Connect Trunk wire 2 (No. 79) with
Handle Pulse Wire (No. 56) as shown in
Pic B.
STEP 5:
Check the Tension Control Knob (No.
12)
is at level 1 (lowest resistance) to
ensure the wire is the longest. Connect
Tension Control Wire (No. 12A) with
Lower Tension Control (No. 78) as
shown in Pic E.
Connect Trunk wire 1 (No. 10) with Trunk
Wire 2 (No. 79) as shown in
Pic C.
Connect Sensor Trunk Wire (No. 11) with
the Sensor Wire (No. 61) as shown in Pic
D.
Tighten and secure Handlebar Post (No.
9) to Main Frame (No. 26) with 6 Bolts
(No. 7), 6 Spring Washer (No. 6) and 6
Washer (No. 22) by Allen Wrench (No.
B).
7
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at support@sunnyhealthfitness.com or 1-877-90SUNNY
(877-907-8669).
1
1a
1b
3
6
7
11
2
10
9
7
6
#6 D8 2PCS
#7 M8*16*S5 2PCS
#2 M5*10 4PCS
#B S5 1PC
#A S13-14-15 1PC
F G
1b
1a
10
11
22
22
#22 D8*16 2PCS
STEP 6:
Remove 2 Bolts (No. 7), 2 Washers (No.
22) and 2 Spring Washers (No. 6) from
Handlebar Post (No. 9) by Allen Wrench
(No. B).
Attach Mid Handlebar (No. 3) on
Handlebar Post (No. 9) with 2 Bolts (No.
7), 2 Washers (No. 22) and 2 Spring
Washers (No. 6) that were removed by
Allen Wrench (No. B).
Connect Computer Wire (No. 1b) with
Trunk Wire 1 (No. 10). Connect
Computer Wire (No. 1a) with Sensor
Trunk Wire (No. 11).
Remove 4 Bolts (No. 2) from Computer
(No. 1) by Spanner (No. A). Tighten and
secure Computer (No. 1) to Handlebar
Post (No. 9) with 4 Bolts (No. 2) that were
removed by Spanner (No. A).
The assembly is complete!
8
ADJUSTMENTS & USAGE GUIDE
20
28
18
MOVING THE RECUMBENT BIKE
To move the recumbent bike, lift up the Rear
Stabilizer (No. 28) until the Transportation Wheels
(No. 20) on the Front Stabilizer (No. 18)
touch the
ground. With the Transportation Wheels (No. 20) on
the ground, you can transport the recumbent bike to
the desired location with ease.
ADJUSTING THE BALANCE
In order to achieve a smooth and comfortable ride, you
must ensure that the recumbent bike is stabled and
secured. If you notice that the recumbent bike is
unbalanced during use, you should adjust both
Adjustable End Cap (No. 29) and Foot Pad (No. 98)
located beneath the front and rear stabilizers. To do
so, simply rotate both Adjustable End Cap (No. 29)
and Foot Pad (No. 98)
until the recumbent bike
becomes levelled with the floor surface.
12
ADJUSTING THE RESISTANCE
Rotate Tension Control Knob (No. 12) clockwise to
increase the level of resistance, rotate the Tension
Control Knob (No.12) counter-clockwise to decrease
the level of resistance. Level 1 is the lowest and level 8
is the highest.
39
39
50
50
H
I
ADJUSTING THE SADDLE
Press down Adjustment Handle (No. 39) and loosen
Saddle (No. 50) to adjust suitable position, as shown
in Pic H. Pull up Adjustment Handle (No. 39) to
secure suitable position, as shown in Pic I.
CLEANING
The recumbent bike
can be cleaned with a soft, clean, damp cloth. Do not use abrasives or
solvents on plastic parts. Please wipe your perspiration off the recumbent bike after each use. Be
careful not to get excessive moisture on the computer display panel as this might cause electrical
hazard or electronics to fail.
Please keep the recumbent bike, especially the computer, out of direct sunlight to prevent screen
damage.
Please inspect all assembly bolts and pedals on the recumbent bike for proper tightness every
week.
STORAGE
Store the recumbent bike in a clean and dry environment, away from children.
9
BATTERY INSTALLATION & REPLACEMENT
+
-
+
-
BATTERY INSTALLATION
1. Take out 2 AAA batteries from computer box.
2. Press the buckle of battery cover on the Computer (No. 1), then remove battery
cover.
3. Install 2 AAA batteries into the battery case on the back of the Computer (No. 1).
Pay attention to the battery + and - poles before installing.
4. Press the buckle of battery cover, then put the battery cover back to the back of the
Computer (No. 1).
The installation is complete!
BATTERY REPLACEMENT
1. Press the buckle of battery cover on the back of the Computer (No. 1), then
remove battery cover.
2. Remove the 2 old AAA batteries in the battery case and install 2 new AAA batteries
into the battery case on the back of the Computer (No. 1). Pay attention to the
battery + and - poles before installing.
3. Press the buckle of battery cover, then put the battery cover back to the back of the
Computer (No. 1).
The replacement is complete!
BATTERY DISPOSAL
Dispose the batteries according to the laws and regulations of your local region.
Some batteries maybe recycled. When disposing or recycling, do not mix battery
types.
Battery
Battery Cover
10
EXERCISE COMPUTER
FUNCTION BUTTONS:
MODE: Press the button to select TIME, DISTANCE, and CALORIES to
preset.
Press the button for selection function display value on LCD or
enter after setting.
Press the button and hold for 3 seconds to reset all values except
odometer to zero.
(When user replaces the batteries, all the values will reset to ZERO
automatically).
SET: To set up the target value of TIME, DISTANCE, and CALORIES.
Press the button and hold for 2 seconds to speed up the increment.
RESET: Press the button to reset function value when setting.
Press the button and hold for 3 seconds to reset all values except
odometer to zero (When the user replaces batteries, all the values will
reset to ZERO automatically).
FUNCTIONS & OPERATIONS:
1. BATTERY INSTALLATION:
Please install 2 AAA 1.5V batteries in the battery case on the back of computer. (Whenever
batteries are removed, all the function values will be reset to zero.)
2. AUTO ON/OFF:
Once the user begins to exercise, the computer will show the workout value automatically. After
about 4 minutes of inactivity, the computer will turn off. Odometer value does not reset to 0 when
the computer turns off. When the user starts to exercise again, the workout value of odometer
will accumulate continuously.
3. AUTO SCAN:
After the computer is powered on, press MODE button and the LCD will display all function
values from TIME-SPEED-DISTANCE-CALORIES-ODOMETER-PULSE. Each value will be
held for 6 seconds.
4. SPEED:
Displays the current training speed from 0.0 to 99.9 MPH (Miles per hour).
5. DISTANCE:
Accumulates total distance from 0.00 up to 9999 M (Miles). The user may preset target distance
by pressing the SET & MODE buttons. Each increment is 0.1 M (Miles).
Automatically counts down from targeting value during exercise.
6. TIME:
Accumulates total time from 00:00 up to 99:59. The user may preset target time by pressing SET
& MODE buttons. Each increment is 1 minute.
Automatically counts down from targeting value during exercise.
7. CALORIES:
Accumulates calories burned during training from 0.0 to 9999 (Cal). The user may also preset
the target calories before training by pressing the SET & MODE buttons. Each setting increment
is 1 Cal.
Automatically counts down from targeting value during exercise.
11
Note: This data is a rough guide which cannot be used in medical treatment.
8. ODOMETER:
Displays the total accumulated distance from 0.0 to 9999 M (Miles). User can also press MODE
button to display the odometer value.
9. PULSE:
The computer will display the user's heart rate in beats per minute (BPM) during training.
Note: This data is a rough guide which cannot be used in medical treatment.
10. RESET:
Press the button and hold for 3 seconds to reset all values except odometer to zero.
NOTE:
1. If the computer display is abnormal, please re-install the new batteries and try again. Always
change both batteries at the same time. Do not mix battery types and do not mix old and new
batteries.
2. Battery Spec: 1.5V UM-4 or AAA (2PCS).
3. Dispose the batteries safely, according to your state and regional guidelines.
APP CONNECTION:
1. Scan the QR code below to download the SunnyFit app onto your mobile device.
2. If this is your first time using the SunnyFit app, follow the in-app instructions to register for your
free SunnyFit account and log in.
3. Ensure that the Bluetooth function is turned on from your mobile device.
4. To connect the equipment to the SunnyFit app:
a. From the “Workout” tab, press on the “Search” button to search for your equipment.
b. Once your equipment appears on the list, tap the “Select” button to confirm.
c. Note: If your equipment does not appear on the "Searching for Equipment" list, check the
EXERCISE COMPUTER on your equipment to ensure that it is not in sleep mode and your
phone's Bluetooth function is on, then tap "Retry" to search again.
d. Once your equipment shows up on the “Workout” tab as “Currently Selected”, your
equipment is now ready to display, track, and record your equipment’s workout stats on the
app!
5. If you are unable to replicate these steps, or have any other issues with the SunnyFit app,
please contact SunnyFit support at support@sunnyfit.com, or use the in-app “Contact Us” form
to request support (“Me” tab -> “Contact Us”).
12
EXPLODED DIAGRAM 1
1
1a
1b
2
3
4
4
5
5
6
9
10
11
18
19
19
20
20
21
21
22
22
23
23
24
24
17
17
25
25
26
27L
27R
28
29
29
24
24
17
17
25
25
30
31
32
32
33
33
33
33
6
6
6
6
22
22
22
22
34
35
35
36
36
22
22
22
22
16
16
16
16
37
37
37
37
38
39
40
41
41
42
43
44
45
46
47
47
48
48
49
49
50
51
52
48
53
54
55
55
56
30
57
58
58
22
59
59
8
8
13
13
5
5
22
12
6
6
6
22
22
22
15
14
7
98
98
#A S13-14-15 1PC
#B S5 1PC
S13
S14
S15
7
7
7
22
12A
13
EXPLODED DIAGRAM 2
62L
62R
63
63
63
63
63
64
64
64
64
64
64
65
65
66
66
67
46
68
69
70
70
71
72
73
74
74
48
48
53
53
46
46
75
76
77
78
79
80
80
81
82
83
83
84
84
85
87
88
89
90
91
70
70
92
93
94
95
96
97
60
61
14
PARTS LIST
No. Description Spec. Qty. No. Description Spec. Qty.
1 Computer 1 35 Square End Cap 50*25 2
1a Computer Wire 1 36 Bushing 2
1b Computer Wire 1 37 Bolt ST4.8*8 4
2 Bolt M5*10 4 38 Adjustable Rod 1
3 Mid Handlebar 1 39 Adjustment Handle 1
4 Foam Grip 2 40 Bushing 1
5 Round End Cap 4 41 Bolt M6*16*S5 2
6 Spring Washer D8 12 42 Fixed Plate 1
7 Bolt M8*16*S5 8 43 Gripping Sleeve 1
8 Bolt ST4.0*19 2 44 Eccentric Wheel 1
9 Handlebar Post 1 45 Bolt M8*10*S5 1
10 Trunk Wire 1 1 46 Washer D12 4
11 Sensor Trunk wire 1 47 Bolt M6*20*S5 2
12
Tension Control
Knob
1 48 Spring Washer D6 8
12A
Tension Control
Wire
1
49 Arc Washer D6*R16 2
13 Handle Pulse Plate 2 50 Saddle 1
14 Arc Washer D5*R30 1 51 Backrest Cushion 1
15 Bolt M5*35 1 52 Bolt M6*45*20 4
16 Bolt M8*20*S5 4 53 Washer D6*Φ12 6
17 Arc Washer D8*R30 4 54 Rear Handlebar 1
18 Front Stabilizer 1 55 Foam Grip 2
19 Round End Cap 2 56 Handle Pulse Wire 1
20
Transportation
Wheel
2 57
Handlebar Cover
Plate
1
21 Bolt M8*40*20*S5 2 58 Bolt M8*47 2
22 Washer D8*16 20 59 Tapered Cap Nut M8*H16*S13 2
23 Nylon Nut M8*H7.5*S13 2 60 Tapping Screw ST4.2*16*Φ8 1
24 Bolt M8*60 4 61 Sensor Wire 1
25 Cap Nut M8*H16*S13 4 62L/R Chain Cover 2
26 Main Frame 1 63 Bolt ST4.2*19 5
27L/R Pedal 2 64
Self-drilling Tapping
Screw
ST4.2*16*Φ8 6
28 Rear Stabilizer 1 65 Crank Cover 2
29 Adjustable End Cap 2 66 Nut M10*1*H8*S15 2
30 C-clip Φ12*11 2 67 Nut M10*H5*S17 1
31 Rail 1 68 Wave Washer D12*15.5 1
32 Square End Cap 60*30 2 69 Flywheel Shaft 1
33 Bolt M8*45*S5 4 70 Bearing 6001 4
34 Backrest Frame 1 71 Nut M10*H2*S15 1
15
No. Description Spec. Qty. No. Description Spec. Qty.
72 Flywheel 1 87 Crank 1
73 Square Magnet 5 88 Round Magnet 1
74 Bolt M6*16*S10 2 89 Belt 6PJ370 1
75 Magnetic Plate Rod 1 90 Bolt M6*12 1
76 Magnetic Plate 1 91 Washer D6*Φ16 1
77 Spring 1 92 Idler Wheel 1
78
Lower Tension
Control
1 93 Bolt M8*12*Φ10 1
79 Trunk wire 2 1 94
Idler Wheel Connect
Staff
1
80 Nut S32 2 95 Spring 1
81 Washer 1 96 Washer D12*Φ17 1
82 Two-slot Nut 1 97 Sensor Holder 1
83 Ball Bearings 2 98 Foot Pad 2
84 Bearing Housing 2 A Spanner S13-14-15 1
85 Three-slot Nut 1 B Allen Wrench S5 1
86 N/A -
Version 1.1
