Sunny SF-B1876 User manual

MAGNETIC BELT DRIVE PREMIUM
INDOOR CYCLING BIKE
SF-B1876
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: [email protected] or 1- 877 - 90SUNNY (877-907-8669).

1
IMPORTANT SAFETY INFORMATION
We thank you for choosing our product. To ensure your safety and health, pleaseuse 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 consultyour physicianto determine ifyou 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 300 pounds (135 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
EXPLODED DIAGRAM
HARDWARE PACKAGE

3
PARTS LIST
No.
Description
Spec.
Qty
No.
Description
Spec.
Qty
1
Main Frame
1
35
Middle Axle
20*184*43*10.5*74.5
*4-10.1*105
1
2
Seat Post
1
36
Left Crank
170 “L” 9/16
1
3
Handlebar
1
37
Belt Wheel
204*20*5PK
1
4
Handlebar Post
1
38
Belt
5PK1320
1
5
Adjusting Screw
1
39
Screw
M10*16*S6 grade 8.8
4
6
Front Stabilizer
1
40
Crank Cap
25*7
2
7
Rear Stabilizer
1
41L/R
Pedal
9/16
2
8
Seat Slider
1
42
Bearing
6004-2RS
2
9
Screw
M10*25*S6
6
43
C-clip
d20
2
10
Flat Washer
d10*Φ20*2.0
6
44
Wave Washer
d20*Φ26*0.3
1
11
Right Crank
170 “R” 9/16
1
45
Nut
M10*1.25*H7.5*S14
2
12
Transportation
Wheel
71*19*24
2
46
Tension Control
Knob
58*44*M8*18
1
13
Screw
7.8*30*M6*15*S5
2
47
Nut
M8*H5.5*S14
3
14
Screw
M6*12*S5
2
48
Nut
M10*H7*S17
8
15
Foot Leveler
M10*30*52*49
4
49
Front Cover
1
16
Adjustment Knob
M16*1.5*18*56
3
50
Bushing
20*20*101
1
17
Limited Spacer
17.2*17.2*35
1
51
Spring
Φ12*49.5*N20
1
18
Bushing
PT45*51*2*PTB35
*41*L198 PP
2
52
Square Nut
15*15*25*M10
1
19
Idler Wheel
Φ42*24*Φ35*20*Φ
12
1
53
Nut
M6*H6*S10
2
20
Wave Washer
Φ15.5*Φ12*0.3
1
54
Nut
M6*H5*S10
2
21
Bottle Holder
1
55
Screw
M6*12*S10
1
22
Screw
M5*16*Φ10
2
56
Screw
M8*48*15*S6
1
23
Washer
d5*Φ13*1
2
57
Magnetic Board
1
24
Bushing
PT45*51*PT35*41
*L198
1
58
Left Stay Cover
1
25
End Cap
PTB35*41*2.5*L20
3
59
Bearing
608ZZ*8
4
26
Seat
1
60
Washer
Φ16*8.5*1.5
3
27
Flywheel
18*460*80*30*55*
42*PK
1
61
Nut
M8*H7.5*S13
4
28
Inertial Axle
15*166*M12*1*29*
2
1
62
Washer
Φ16*6.5*1.5
1
29
Bearing
6202-2RS C&U
3
63
Magnet
30*20*5
6
30
Spacer
20*15.1*28
1
64
Screw
M6*10*12
4
31
Nut
M12*1*H6*S19
2
65
Grommet
4
32
Idler Wheel Connect
Shaft
1
66
Washer
Φ17*Φ11*2
2
33
Idler Wheel
Adjusting Plate
T2.5*60*24.3
1
67
Inner Belt Cover
1
34
Nut
M12*1.0*H11*S18
2
68
Outer Belt Cover
1

4
No.
Description
Spec.
Qty
No.
Description
Spec.
Qty
69
Middle Axle Cover
1
81
Computer
1
70
Plug
38*34
1
81a/b
Link Wire of
Computer
1
71
Brake Rod
10*230*M8*20*M6
*35*M10*100
1
82
Handle Pulse
Wire
950
1
72
Left Front Side
Cover
1
83
Sensor Wire
350
1
73
Right Front Side
Cover
1
84
Magnet
Φ17*14.5*Φ10
1
74
Screw
ST4.2*16*10.5
7
85
Sensor Holder
1
75
Upper Flywheel
Cover
1
86
Handle Pulse
2
76
Screw
M5*8*8
3
87
Screw
ST4.0*19*Φ7
2
77
Screw
ST4.2*16*8
10
88
Spacer
Φ20*43.5
1
78
Open End Wrench
S13-15
1
89
Screw
M8*25*12*S6
1
79
Allen Wrench
S6
1
90
Washer
d6*Φ12*1.5
1
80
Spanner
S14-15-17
1
91
Screw
M8*45*S6
1
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 front
of the manual)
Please contact us at [email protected] or 1- 877 - 90SUNNY (877-907-8669).

5
ASSEMBLY INSTRUCTIONS
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at suppor[email protected] or 1-877-90SUNNY (877-
907-8669).
#22 M5*16*Φ10 2PCS
#23 d5*Φ13*1 2PCS
1
S15
41L
41R
21
23
22
11
36
#80
#78
STEP 1:
Attach the Front and Rear Stabilizers (No. 6 &No.
7) to the Main Frame (No. 1) using 4 Screws (No. 9)
and 4 Flat Washers (No. 10). Tighten and secure with
Allen Wrench (No. 79).
STEP 2:
Connect the Left &Right Pedals (No. 41L & No.
41R) to the Left &Right Crank (No. 36 & No. 11).
The Left & Right Pedals (No. 41L & No. 41R) are
marked Lfor the left pedal and Rfor the right pedal.
Left Pedal: Align the Left Pedal (No. 41L) with the
Left Crank (No. 36) at 90 degrees. Gently insert the
pedal into the crank arm, turn the pedal counter-
clockwise as tightly as you can with your hand.
Tighten and secure with Open End Wrench (No. 78).
Right Pedal: Align the Right Pedal (No. 41R) with the
Right Crank (No. 11) at 90 degrees. Gently insert the
pedal into the crank arm, turn the pedal clockwise as
tightly as you can with your hand. Tighten and secure
with Open End Wrench (No. 78).
Remove 2 Screws (No. 22) and 2 Washers (No. 23)
from Main Frame (No. 1) with Spanner (No. 80).
Attach the Bottle Holder (No. 21) to the Main Frame
(No. 1) using 2 Screws (No. 22) and 2 Washers (No.
23) that were removed. Tighten and secure with
Spanner (No. 80).

6
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at suppor[email protected] or 1-877-90SUNNY (877-
907-8669).
83
81
81a 81b
83 82
81a 81b
82
3
STEP 3:
Loosen and remove the Adjustment Knob (No. 16).
Insert the Handlebar Post (No. 4) into the tube
located on the front of the Main Frame (No. 1).
Adjust the Handlebar Post (No. 4) to the desired
position, then secure it in place by reinserting and
tightening the Adjustment Knob (No. 16).
Attach the Handlebar (No. 3) to the Handlebar Post
(No. 4) using 2 Screws (No. 9) and 2 Flat Washers
(No. 10). Tighten and secure with Allen Wrench
(No. 79).
STEP 4:
Attach Computer (No. 81)onto the computer seat on
the Handlebar (No. 3).
Connect the Link Wire of Computer (No. 81a) with
the Sensor Wire (No. 83). Then connect the Handle
Pulse Wire (No. 82) with the Link Wire of Computer
(No. 81b).
The assembly is complete!

7
BATTERY INSTALLATION AND REPLACEMENT
81
Battery
Battery
Cover
81a
81b
BATTERY INSTALLATION:
1. Take out 2 AAA batteries from the plastic bag for manual.
2. Press the buckle of battery cover on the back of the Computer (No. 81), then remove battery
cover.
3. Install 2 AAA batteries into the battery case on the back of the Computer (No. 81). Pay attention
to the battery + and –ends before installing.
4. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 81).
The installation is complete!
BATTERY REPLACEMENT:
1. Press the buckle of battery cover on the back of the Computer (No. 81), 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. 81). Pay attention to the battery + and –ends
before installing.
3. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 81).
The replacement is complete!
NOTE: Always change both batteries at the same time. Do not mix battery types and do not mix old
and new batteries. Dispose batteries according to your state and regional guidelines.

8
ADJUSTMENTS GUIDE
A
B15#80 S14-15-17
48
ADJUSTING THE BALANCE
In order to achieve a smooth and comfortable ride, you must
ensure that the stability of the bike is secured. If you notice that
the bike is unbalanced during use, you should adjust the foot
levelers located beneath the Front and Rear Stabilizers of the
bike. To do so, use Spanner (No. 80) to loosen 2 Nuts (No. 48)
by turning it clockwise (direction A). With the nut loosened, rotate
the Foot Leveler (No. 15) until it sits level with the surface that
the bike is on. When you have finished adjusting the foot leveler,
use Spanner (No. 80) to re-tighten the 2 Nuts (No. 48) by turning
it counter-clockwise (direction B). If required, repeat this process
to adjust the remaining foot levelers.
8
216
ADJUSTING THE SEAT
The seat of this bike is fully adjustable as it moves Up, Down,
Fore (forward), Aft (backward).
To adjust the height of the Seat Post (No. 2), loosen and pull the
Adjustment Knob (No. 16) outward, then raise or lower the seat
to the desired height. Once adjusted, re-insert and tighten the
Adjustment Knob (No. 16) to secure the seat in place.
To adjust the seat back and forth, loosen and pull Adjustment
Knob (No. 16) outward, then slide the Seat Slider (No. 8) to the
desired position. Once positioned, re-insert and tighten the
Adjustment Knob (No. 16) to secure the seat slider tube in
place.
4
16
ADJUSTING THE HANDLEBAR
It is important that the handlebar and seat are both set to the
correct height of your body. To adjust the handlebar height,
loosen and pull the Adjustment Knob (No. 16) outward, then
slide the Handlebar Post (No. 4) up or down to the desired
height. Once adjusted re-insert and tighten the Adjustment
Knob (No. 16) to secure the handlebar post in place.
PEDAL STRAP ADJUSTMENT
Your feet should be secured in the toe clips during exercise.
Place your feet as far forward into the toe clips as you can. With
your feet in place, turn the crank to bring one foot to within arm’s
reach, grasp the pedal strap and pull it upward to tighten the toe
clip cage, then insert the strap back into the hoop of the toe clip.
Repeat this process to secure your other foot.

9
46
ADJUSTING THE RESISTANCE
Adjust the resistance of the bike using the Tension Control
Knob (No. 46). Increase the level of resistance by turning the
Tension Control Knob (No. 46) to the RIGHT (clockwise),
decrease the level of resistance by turning the Tension Control
Knob (No. 46) to the LEFT (counter-clockwise).
EMERGENCY BRAKE
During use, users can stop the bike completely by pushing down
on the Tension Control Knob (No. 46). Pushing down on the
Tension Control Knob (No. 46) will enforce the brake and bring
the bike to an immediate stop.
16 3
TRANSPORTING THE BIKE
To move the bike, first ensure that the Handlebar (No. 3) is
properly secured. If the handlebar is loose, tighten the
Adjustment Knob (No. 16) to secure it. Next, stand at the front
of the bike so that you’re directly in front of the handlebar. Firmly
grasp and hold each side of the handlebar, place one foot on the
front stabilizer and tilt the bike towards you untilthe transportation
wheels on the front stabilizer touch the ground. With the wheels
on the ground, you can transport the bike to the desired location
with ease.
NOTE: When moving the bike, always use caution as unexpected
impact, such as dropping the bike, may cause injury and affect
the bike’s performance.
DISMOUNTING
For your safety, it is recommended that you never attempt to dismount or remove your feet from
the pedals until both the flywheel and pedals/crank have come to a complete stop. Failure to
follow this recommendation may lead to loss of control and/or serious injury.
Here are a few examples of how to safely dismount the bike:
1. Reduce the pedal speed until the pedals/crank come to a complete stop.
2. Increase the resistance until the pedals/crank come to a complete stop.
3. Push and hold the tension knob down until the pedals/crank come to a complete stop.

10
SPD TECHNICAL SERVICE INSTRUCTIONS
Caution!
Before use, read these instructions carefully.
⚫Practice engaging and disengaging from the pedals several times in a stationary position
before riding.
⚫Before using, lubricate the concave area of the clip.
⚫Keep the cleat and pedal clean to ensure proper usage.
⚫Before using, adjust the retention force of the pedal to suit your needs.
Note:
1. After tightening the cleat, practice engaging and releasing one shoe at a time.
2. Check your pedals each time before you ride the bike.
3. When the pedal starts to wear on the axle, it will not function properly. We recommend you
replace the entire pedal.
USE Engaging Disengaging
Press the cleat into the pedal. Remove by twisting your heel to the outside.
ADJUSTING THE SPRING TENSION OF THE BINDING
The tension of the spring is adjusted for each pedal (top & bottom) with the adjustment bolt in the
rear using a 4mm Allen Wrench.
Using a 4mm Allen Wrench, turn the bolt in a clockwise direction to increase retention force. Turn
the bolt in a counter-clockwise direction to decrease retention force.
2
Decrease
Increase
4mm Allen Wrench

11
EXERCISE COMPUTER
FUNCTION BUTTONS
MODE:
Press to select the function displayed or during setting mode.
Press and hold for 2 seconds to enter the RACE MODE interface during
stop mode.
SET:
To set up the target value of TARGET, TIME, DIST, CAL.
Press the button and hold for 2 seconds to speed up the increment during
stop mode.
RESET:
Press the button to reset function value during setting mode.
Press the button and hold for 2 seconds to reset all values to zero.
(When the user replaces the batteries, all values will reset to zero.)
FUNCTIONS:
SPEED: Displays the speed from 0 to 99.9 KPH or MPH.
AVG SPEED: Displays the average speed only in STOP mode.
MAX SPEED: Displays the maximum speed only in STOP mode.
CADENCE (RPM): Displays the frequency per minute from 0 to 999.
AVG CADENCE (AVG RPM): Displays the average cadence (RPM) in STOP mode.
MAX CADENCE (MAX RPM): Displays the maximum cadence (RPM) in STOP mode.
DISTANCE (DIST): Accumulates total distance from 0.0 to 999.9 KM or Miles. User can preset
TARGET DISTANCE by pressing MODE & SET.
TARGET DISTANCE (TGT DIST): Users can preset the Distance in the TARGET mode.
CALORIES (CAL): Accumulate total Calories from 0.0 to 9999. User can preset target calories.
RACE: Exercise in the TARGET MODE.
TIME: Accumulates total time from 00:00 to 99:59. User can preset target Time.
TARGET TIME: Users can preset the Time in the TARGET MODE.
PULSE: Display the current pulse rate.
MILES OR KILOMETERS SETTING:
The default setting is miles. Press and hold SET and MODE together for 2 seconds to change to
kilometers.
SET TARGET VALUES:
1. Press SET to select a target value. CADENCE will start to flash.
2. Press and hold SET and the value will increase continuously.
3. Press MODE to enter.
4. TIME will flash.
5. Press SET to select a value.
6. Press MODE to enter.
7. Repeat to select values for DIST and CAL.

12
1. TARGET: the preset CADENCE.
2. In STOP mode, press SET key to enter the TARGET setting in stop mode. Press SET to increase
the CADENCE five at a time. The setting change is 15 →20→……110→115→120→15→20
→……→115→120→15 →20→……
3. The setting range of 15 -120 (Preset value is 60 CADENCES which equals six bars).
4. Each bar equals 10 CADENCE. Total is 12 bars.
Each arrow equals 10 CADENCES (1-10 CADENCES displays one arrow, 11-
20 displays two). The maximum arrows displayed is 12.
This down arrow next to the bicycle icon will be displayed when the current
CADENCE is more than the TARGET CADENCE. The bicycle icon will be displayed during exercise
mode.
RACE MODE:
Press and hold MODE for 2 seconds to enter RACE mode.
In RACE MODE, only TIME and DIST can be set.
Default values for 10 minutes / 4 (KM or Miles).
Total is 10 bars.
PULSE:
To measure the pulse, press MODE until computer is on the PULSE function. Hold the handle pulse
sensors for at least 5 seconds to measure your pulse. This value is for reference only. It cannot be
used as the basis for medical treatment.
BATTERY: This computer uses two AAA batteries. If the display appears incorrectly or becomes
difficult to read, please install new batteries. Always change both batteries at the same time. Do not
mix battery types and do not mix old and new batteries. Dispose batteries according to your state
and regional guidelines.
When Current CADENCE is less than Target CADENCE,
the up arrow next to the bicycle will be displayed.

13
MAINTENANCE INSTRUCTIONS
This is general information for daily, weekly and monthly maintenance to be performed on your bike.
DAILY MAINTENANCE
After each exercise session, wipe down all the
equipment: seat, frame, and handlebars. Pay
special attention to the seat post, handlebar
post, and belt/chain guard. Sweat is very
corrosive and may cause problems that require
parts replacement later.
1. Get on the bike and engage the drive train.
2. Pay attention to any vibrations felt through
the pedals. If you feel any vibrations, you
may need to tighten the pedals, bottom
bracket, or adjust the drive belt/chain
tension.
3. Use a wrench to tighten the pedals until they
are secure.
MONTHLY MAINTENANCE
1. Check if all hardware is secure, such as:
water bottle holder, flywheel nuts, belt/chain
guard bolts, brake caliper lock nuts, and
brake caliper tension rod nuts.
2. Inspect the brake tension rod for signs of
wear such as missing threads. Clean and
lubricate the brake tension rod.
3. Clean and lubricate the seat post,
handlebar post and seat slider. Remove any
buildup of foreign material.
WEEKLY MAINTENANCE
1. Inspect moving parts and tighten the
hardware.
2. Inspect pull pin frame fittings to make sure
the fittings are secured. Loose frame fittings
may strip out threads over time and cause
extensive damage.
3. Clean and lubricate pop pin assemblies. Pull
on the pin and spray a small amount of
lubricant onto the shaft.
4. Tighten the seat hardware to make sure the
seat is level and centered.
5. Brush and treat the resistance pads. Remove
any foreign material that may have collected
on the pads. Spray the pads with silicone
lubricant. This helps to reduce noise from
friction between the pads and the flywheel.
6. Visually inspect the bottom bracket, toe clips
and toe straps. If any of them are loose or
disconnected, attach and tighten.
LEATHER BRAKE PAD CARE (If Applicable)
1. Perform this maintenance when the brake
pad is first installed and for the life of the
brake pad. Following these simple
guidelines can increase the life of your brake
pads.
2. Some brake pad assemblies are pre-
lubricated. Squeeze the brake pad. If
lubricant is released, then the pad has been
pre-lubricated.
3. If the brake pad is dry, then coat the brake
pad with 3-n-1 oil. Brush the leather with a
clean, wire bristle brush, and then apply the
oil. The oil should be allowed to soak into the
pad. Repeat 4-5 times until the pad is
saturated, but not dripping with oil. When the
pad is saturated, it will no longer absorb oil.
4. Inspect the brake pad weekly and lubricate if
needed. The pad should not have a glazed
appearance. If the pad appears glazed, then
brush it with wire brush and apply lubricant
as needed. If any of the sponge padding is
showing through the leather pad, the brake
pad should be replaced.
Version: 1.1

14