C3STROM ASTRO User manual

Please turn to the final
page
for tool kit check list

User Manual
Thank you for purchasing this C3STROM ebike.
C3STROM ASTRO / ASTRO PRO
Scan QR code below : Ebike Assembly Video

Using This Manual
This manual contains detailed information about the product and its equipment, as well as
information about operation, maintenance and other useful tips for the owner. Please read it
carefully and familiarize yourself with the ebike before use to ensure safe use and prevent acci-
dents. This manual contains many warnings and cautions regarding safe operation and the
consequences if proper setup, operation and maintenance are not performed. All information in
this manual should be read carefully and if you have any questions, contact C3STROM immedi-
ately.
This manual and any other documents accompanying the ebike should be retained for future
reference, but all contents of this manual are subject to change without notice.
NOTICE: This manual is not intended to be an extensive reference book about service, maintenance and / or
repairs. Please consult your dealer for service and technical support. You can find more information about our products
or find a dealer via www.c3strom.com.

CONTENTS
General Information ----------- 1
1.1. Frame Components ------------------- 1
1.2. Size & Specification ------------------- 2
1.3. PAS & Throttle ------------------------- 3
Battery ------------------------------------ 18
4.1. Battery Information ------------------- 18
4.2. Battery Charging ---------------------- 19
4.3. Battery & Charger Safety Warning - 20
Apps & Display --------------------- 12
3.1. App instructions ----------------------- 12
3.2. Finger-tip Control --------------------- 13
3.3. Display instructions ------------------- 14
Assembly ------------------------------- 4
2.1. What’s in the box ---------------------- 4
2.2. Assembly Process --------------------- 6
1
2
3
4
5
6
7
8
Warranty --------------------------------- 23
7.1. What’s covered -------------------------- 23
7.2. What is not covered ------------------- 23
7.3. Submitting a claim -------------------- 25
Maintenance -------------------------- 22
6.1. Cleaning --------------------------------- 22
Tool Kit Check List ---------------- 27
Safety & Warning ------------------ 21

1. General Information
General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
1.1. Frame Components
Rear light
Fender
Motor
Chain
Crank Chainwheel Pedal
Disc brake
Front fork
Front light
Handlebar
Throttle
Saddle
Battery
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
SIZE
A -- Maximum Seat Height 32.5’’
C -- Seat Length 18.5’’
B -- Standover Height 30.6’’
D -- Handlebar Height 42’’
E -- Bottom Bracket Height 10.5’’
F -- Front-Center 23’’
J -- Head Tube Angle 65°
I -- Total Length 70’’
H -- Wheelbase 47.4’’
G -- Chainstay Length 24.4’’
K -- Top Tube Horizontal 34.6‘’
C3STROM ASTRO / ASTRO PRO Specification
Motor
750W
*Up to 1500W on
OFF-ROAD mode
Derailleur
Shimano 7-speed
3.5” LCD display
with USB
52V20Ah / 52V15Ah
Samsung 21700 battery
with 52V4A charger
35A peak
frame-intergrated controller
Half twist throttle Hydraulic disc brake
Display
6061 aluminium alloy
Frame
Battery
Shimano 7-speed
ASLRS45R7AT
thumb shifter
Shifter
Controller
56T. 170mm
Crank Set
Throttle
Kenda
20×4-1/4
Tires
Brake
1.2. Size & Specification
2

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
1.3. PAS & Throttle
Due to the powerful support of the motor you will be able reach high speeds faster than when
riding a conventional bicycle. To get used to this, we advise to use the e-bike in a familiar setting
without too much traffic in the surrounding area when driving it for the first time.
When you start biking, be aware of the electrical that will instantly be provided by the motor.
We advise to use the lowest power level when driving driving off for the first time.
When switching off pedal assistance the ebike can still be used just like a regular bike. Howev-
er, be aware that the lights of the ebike will not work when driving around without using the
battery.
The throttle should provide smooth acceleration when gradually applied. If the throttle, brake
lever, pedal assistance, or lighting are functioning abnormally, intermittently, or not working,
please stop using your ebike immediately.
With throttle on demand you can use the throttle from a complete stop, rather than pedelling
first, which can help when riding up steep hills or through an area with lots of stop signs. Howev-
er, we generally recommend always pedalling first then using throttle wherever possible to
ensure stability.
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
2. Assembly
2.1. What’s in the box
Fully wrapped C3STROM ASTRO / ASTRO PRO with foam and cardboard
4

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
2.1. What’s in the box
Axle*1
Pedal L*1
Pedal R*1
Power Converter*1
Charger*1
User Manual*1
Battery box
5mm Allen wrench*1
12mm M5 Screws*2
34mm M6 Screw*1
13 / 15 mm DoubleWrench*2
8 / 10 mm DoubleWrench*1
4mm Allen wrench*1
Tool box
5
Axle
Pedal L Pedal R
Power Converter
User Manual
Charger
12mm M5 Screws
15
13
13 / 15 mm Double Wrench
15
13
13 / 15 mm Double Wrench
10
8
8 / 10 mm Double Wrench
5mm Allen wrench 4mm Allen wrench
34mm M6 Screw

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
2.2. Assembly process
a. Please loosen the front wheel.
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
b. Please take the screw nut of the
axel off as shown in the picture and
insert it into the hole in the middle of
the wheel.
c.Turn the wheel around to tighten
the screws.
NOTICE: Please leave some space for further
tightening after following the next steps.
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
d. Place the front fork onto the wheel. e.Use the two 13/15 wrenches at the same
time (both on the 15 inch side) to tighten
the screws.
Make sure it's placed on that part that was
tightened.
13
15
13
13
8

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
f. Place the fender between the front
wheel and the front fork. (As the picture
shows)
g. Put the screw through the hole on
the front fork and the lifting eye on
the fender. (As the picture shows)
i. Put the M6 34mm screws through
the fender and front fork, and tighten
them with the 4mm allen wrench. (As
the picture shows)
h. Use the 5mm allen wrench to keep
the screw in place and tighten the
screw using the 8/10mm double
wrench (the 10mm side). (As the picture
shows)
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
j. Loosen the screws using the 4mm
allen wrench and take the cap off
here. (As the picture shows)
k. Put the screws back in place and
tighten it here. (As the picture shows)
m. Tighten the screws here. (As the
picture shows)
l. Put the screws back in place. (As the
picture shows)
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
n. Insert the two turn signals in the
position as shown in the picture
below and then tighten the screws.
o. Identify the left and right sides of
the pedal. Left is mark with WL, right
is mark with WR.
p. Insert the pedals into the holes of
the crank on each respective side and
tighten them in a counterclockwise
direction with a 15mm wrench.
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
3. Apps & Display
3.1. App instruction
Please scan the QR codes to download the APP and video for APP tutorial.
12
iOS / Android C3STROM APP Tutorial

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
3.2. Finger-tip Control
Slide button to use turn signal. (Press to turn on left signal, press to
turn on right signal)
HB (High Beam)
LB (Low Beam)
Turn signal (Left & Right)
Horn
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General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
3.3. Display Instructions
Functional Area Distribution
14
1. Battery power
2. Motor power
3. USB charging
4. MPH
5. Km/h
6. Maximum speed
7. Average speed
14. Wheel diameter
15. Lights
16. Walk mode (under 6km/h)
17. Real time speed display / wheel
diameter setting display / Version
information display
8. Error code
9. Total mileage display / Single time
range display
10. Power gear display
11. ECO mode
12. Standard mode
13. Turbo mode

General Information Assembly Apps & Display Battery Safety & Warning Maintenance Warranty
Functional Area Distribution
15