Velotric Thunder 1ST User manual

1
Thunder 1 ST
Owner's Manual

012
WELCOME!
Thank you for purchasing a Velotric product.We are delighted that another person has decided to
discover (or rediscover) the joy of riding. Just one thing before your ride: read this owner’s manual
and ensure that you’re ready for a safe and comfortable ride. Please keep this manual for future
reference as well.
DISCLAIMER
■Velopower, Inc. makes no warranty as to the accuracy, sufciency, or suitability of the
information in the owner's manual because of continuous product improvement.
■Velopower, Inc. assumes no responsibility or liability for injuries, losses, or damages, whether
direct, indirect, consequential, or incidental, that might arise out of the use of information in the
owner's manual.
■Velopower, Inc. is not responsible or liable for the failures, damages, or injuries resulting from
repairs attempted by unqualied personnel or improper assembly and operation.
■The illustrations in the owner's manual are for demonstration purposes only. Details may
appear slightly different depending on the product revision.
■Velopower, Inc. reserves the right to change the information in the owner's manual without notice.
IMPORTANT SAFETY INFORMATION
The owner's manual provides important operation and maintenance instructions for your Velotric
ebike (hereinafter referred to as ebike). Read the owner's manual carefully before riding and save
it for future reference. Failure to follow any instructions in the owner's manual may result in electric
shock, re, and/or serious injury.

0302
SYMBOLS USED
The following symbols are used throughout the owner's manual to highlight important information:
WARNING
!Indicates a potentially dangerous condition that
could result in injury or death.
CAUTION
!Indicates a critical procedure for safe and proper
installation and operation.
NOTE Indicates an important step or tip for optimal
performance.
GENERAL SAFETY INFORMATION
WARNING – When using this ebike, basic precautions should always be followed,
including the following:
■Read all safety precautions carefully before riding.
■Always wear a properly tted helmet when riding the ebike to reduce the risk of head
injury in an accident.
■Keep both hands on the handlebar and the brake levers within reach while riding,so as
to be able to respond to any situation immediately. Failing to do so can cause loss of
control of the the ebike.
■To reduce the risk of injury, close supervision is necessary when the ebike is used near
children.
■DANGER! Failure to properly assemble, operate, and maintain the ebike could result in
serious injury or death.
■Ensure that there are no worn or damaged parts that may fail during the ride.
■Keep the ebike out of the reach of children.
■Only charge the battery with an original charger. Keep the battery and charger away
from water and open re.
■Always charge your battery at temperatures between 41°F to 104°F (5°C to 40°C), but
preferably at room temperature ranges from 50°F to 86°F (10°C to 30°C).
■The ebike is not intended to be used at ambient temperatures lower than 14°F (-10°C)
or higher than 113°F (45°C).
■Always tighten fasteners according to
“Recommended Torque Values” .Otherwise, it
may cause damage to the ebike or result in injury.
■Failure to properly charge, store, or use the battery may void the warranty and cause a
hazardous situation.
■In the event of re, cover the re with plenty of sand and call emergency services
immediately.
■Do not put your ngers or hands into the wheel or other moving parts while the ebike is
in motion.
■Do not use the ebike if the charger's exible power cord or output cable or any of the
electrical cables on the ebike is frayed,has broken insulation,or any other signs of
damage.
■Do not tamper with or modify the ebike. Otherwise, it may seriously impair the
handling, stability, and other aspects of the ebike, making it unsafe to ride and voiding
the warranty.
■Do not dispose of the ebike as household waste. Comply with local, state, and federal
laws and regulations and use recycling channels as required.
SAVE THESE INSTRUCTIONS

0504
TABLE OF CONTENT
BEFORE THE FIRST RIDE 07
Standover Height 08
Saddle Position Adjustment 08
Brake Lever Adjustment 08
Stay Within the Weight Limits 09
Riding With a Child 09
Safety Check 09
BEFORE EVERY RIDE 11
General Inspection 12
Brake System Inspection 14
Electrical System Inspection 15
Recommended Torque Values 16
ADJUSTING FOR COMFORT AND SAFETY 17
Adjust the Saddle Height 18
Adjust the Saddle Angle and Horizontal Position 20
Adjust the Brake Lever Positioning 21
Adjust the Stem Angle 22
OPERATION INSTRUCTION 23
Remote (PAS control panel) 24
Control Panel 24
Power On/Off 25
Pair With the Apple Find My 25
Start Riding 25
Select Appropriate Assist Level 26
Walk Mode 26
Front Light 27
Brake 27
Charge the Battery 28
USE CONDITIONS AND WEIGHT LIMITS 31
Use Conditions 32
Weight Limits 34
TROUBLESHOOTING 35
Troubleshooting 36
Error Code 38
STORAGE & MAINTENANCE 39
Maintenance 40
Storage 42
Cleaning 43
Parking 44
SUPPORT INFO 45
WARRANTY POLICY 47
Limited Warranty Terms 48
This Limited Warranty Does Not Cover 48
Shipping Damage 49
TECHNICAL SPECIFICATIONS 51
Electronics 52
Ebike Components 52
Range/Speed/Weights 53

BEFORE
THE FIRST RIDE
Standover Height 08
Saddle Position Adjustment 08
Brake Lever Adjustment 08
Stay Within the Weight Limits 09
Riding With a Child 09
Safety Check 09

0908
Standover Height
When selecting a new ebike, the correct choice of frame size is a very important safety
consideration.
Standover height is the basic element of
ebike tness. It is the distance from the
ground to the top of the ebike frame at the
point where your crotch is when straddling
the ebike with both feet at on the ground.
There should be a clearance of 1 inch to 2
inches (25.4 mm to 50.8 mm) between your
crotch and the top tube of the ebike.
If your crotch touches the frame, it indicates
that the ebike is too big for you.
To check for the correct standover height,
straddle the ebike while wearing the kind of
shoes in which you will be riding,and bounce
vigorously on your heels.
Saddle Position Adjustment
Small changes in saddle position can have a substantial effect on performance and comfort. To
nd the desired saddle position, you need to make only one adjustment at a time. For detailed
information, refer to “Adjust the Saddle Height” . If you want to adjust the saddle backward or
forward,refer to “Adjust the Saddle Angle and Horizontal Position” .
Brake Lever Adjustment
The angle of the brake levers can be adjusted for the most comfortable hand position possible. If
you have big or small hands or nd it difcult to squeeze the brake levers, you can also adjust the
distance between the brake lever and the handlebar. For detailed information, refer to “Adjust the
Brake Lever Positioning” .
Stay Within the Weight Limits
The ebike and its parts have strength and integrity limitations. Before riding for the rst time, it is
essential to get to know the weight limit of your ebike. For detailed information, refer to the “Weight
Limits” in this owner's manual.
Riding With a Child
Never carry passengers, especially children. Otherwise, it may cause loss of control of the ebike
and result in serious injury or death, and void the warranty. Please note that this ebike is not
designed for riding by children under the age of 16.
Safety Check
■Ensure that the handlebar cables were routed correctly when the handlebar was installed.Turn
the handlebar fully to the left and right and ensure that no cables or wires can be taut.
■Ensure that the pedals are secured with a pedal wrench according to the torque value listed in
“Recommended Torque Values” .
■Ensure that the cable connectors on the ebike are all plugged in securely and that nothing
loosened in shipping.
■Check the brake functions per the directions in the
“Brake System Inspection” .
It is normal that brakes can rub a little the rst few times you ride. Any squeaks or noises will
disappear with use.
For more detailed information about safety checks, refer to “Before Every Ride” .

BEFORE
EVERY RIDE
General Inspection 12
Brake System Inspection 14
Electrical System Inspection 15
Recommended Torque Values 16

1312
General Inspection
Handlebar
■Ensure that the handlebar is at 90° to the front wheel. For more detailed information, refer to
“Adjust the Handlebar Angle” .
90°
90°
■Ensure that the handlebar is tightened sufciently so that it will not twist out of alignment and
does not rotate in the stem.
■Ensure that no cables are pulled or caught when you turn the handlebar from side to side.
■Ensure that the handlebar and stem are aligned, correctly adjusted, tightened, and allow proper
steering.
Front Fork
■Ensure that the front fork is not bent or broken.
■Ensure that the front fork is securely tightened.
Wheels and Tires
■Ensure that tires are holding air and
inated to the recommended PSI indicated
on the tire sidewall. Do not overinate or
underinate tires.
The standard tire pressure on a Velotric
Thunder 1 ST is 75 PSI, as shown in the
illustration on the right.
■Ensure tires have good tread, have no
bulges or excessive wear, and are free
from any other damage.
■Ensure rims run true and have no obvious
wobbles, dents, or kinks.
■Check each wheel spoke.If any are loose
or broken, seek help from a qualied
mechanic.
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■Check the axle nuts on the rear wheel to ensure they are correctly tightened.
■Check the security of the front and rear wheel mounting. The wheel security and hardware
torque should also be checked on a regular basis. For more detailed information, refer to
“Recommended Torque Values” .
Saddle and Seatpost
■Ensure that the saddle is in line with the center of the frame.
90°
90°
■Check that the seatpost is tightened sufciently so that the saddle will not twist out of
alignment, or move or tilt up and down.
■Ensure that the seatpost is fully inserted over the minimum insertion mark.
Chain
■Ensure that the chain has the correct
tension and won't fall off the chainring
during a ride. If you are unsure about the
correct tension, seek help from a qualied
mechanic.
■Ensure that the chain has no kinks, rust,
broken pins, plates, or rollers.
■Pay special attention if you live in a coastal
or dusty area.Ensure that the drivetrain is
clean and lubricated with lubricating oil.
Pedals
■Ensure that the pedals are securely tightened to the cranks.
■Ensure that the pedals are parallel to the ground and can rotate freely when the ebike is centered.
■Ensure that the pedals and your shoes are clean and free of debris that could affect your grip
or interfere with the pedal system.

1514
Reectors
■Ensure that all reectors are properly tted and not obscured.
■Ensure that front and rear reectors are secured, clean, and positioned perpendicular to the
wheel.
Fasteners
Ensure that all fasteners are properly tightened and secured according to “Recommended Torque
Values” .
Brake System Inspection
Front Brake Rear Brake
Brakes are essential to safety. Test your brakes for proper functioning before every ride.
■Ensure that the brakes are clean and free of debris that could interfere with the brake system.
■Ensure that brake levers are lubricated and tightly secured to the handlebar.
■Check brake pads and rotors for wear and ensure that they are not overworn.
■Ensure that the brake rotor ts correctly between the brake pads.
■Ensure that the front and rear brakes work properly.
■Test that the brake levers are rm and that the brake and rear light are functioning properly.
■While standing still,ensure that you can apply full braking force without the brake lever
touching the handlebar. Otherwise, the brake lever needs to be adjusted. For detailed
information, refer to “Adjust the Brake Lever Positioning” .
Electrical System Inspection
Control Panel
■Ensure that the control panel is securely tightened.
■Ensure that the control panel works properly.
Front Light & Rear Light
■Ensure that the front and rear lights are securely attached and properly positioned.
■Ensure that the front and rear lights are not covered by foreign objects.
■Ensure that the cable of the front light is properly connected and secured.
■Ensure that the front light can be switched on or off when pressing the "Light" button.
■Ensure that the rear light can be switched on or off when pressing the button on its top.
Battery
■Ensure that the battery is properly installed and securely tightened.
■Ensure that the battery is well charged before riding.You can check the battery level by the 4
LED indicators on the control panel. For more detailed information, refer to “Control Panel” .
■Ensure that the battery is stored at an ambient temperature of 50°F to 77°F (10°C to 25°C).
For more detailed information, refer to “Battery Storage” .
Cables
■Ensure that all cables are not overly bent and no kinks are present.
■Check and ensure all cable connections are tight, secure and free from debris or moisture.
■Ensure that there is no damage or wear on the cables.
■Ensure that all cables and housings are properly secured to the frame or fork so that they
cannot interfere with or get caught on moving parts.

16
Recommended Torque Values
Always tighten the fasteners to the correct torque. Too much torque can stretch, deform, or break
a fastener or the part it attaches to or tightens. Too little torque can allow the part to move and
may lead to fatigue and breakage of the fastener or the attached part. Either mistake can lead to a
sudden failure of the fastener, causing you to lose control and fall.
Category Fastener Tool Torque Spec. (Nm)
Handlebar
section
Grip clamp bolts M3 Allen key 2-4
Stem clamp bolts M5 Allen key 13-14
Shifter clamp bolt M5 Allen key 8-12
Brake lever clamp bolts M4 Allen key 7-9
Stem faceplate bolts M4 Allen key 6-8
Stem top cap bolt M4 Allen key 7-9
Brake Disc brake bolt M5 Allen key 7-10
Disc brake adapter bolt M5 Allen key 7-10
Brake rotor clamp bolts T25 screw wrench 5-7
Saddle Seatpost clamp bolt M5 Allen key 7-9
Saddle adjustment bolts M6 Allen key 12-14
Frame Control panel mounting bolt M2 Allen key 2-4
Rear derailleur mounting bolt M5 Allen key 8-11
Derailleur cable clamp nut M5 Allen key 4-7
Motor axle nuts 18mm wrench 40-50
Kickstand mounting bolts M5 Allen key 8-12
ADJUSTING FOR
COMFORT AND SAFETY
Adjust the Saddle Height 18
Adjust the Saddle Angle and Horizontal Position 20
Adjust the Brake Lever Positioning 21
Adjust the Stem Angle 22