MA Metro 750 User manual
Metro 750
PLEASE READ ME FIRST
www.magnumbikes.com
Contents
1.General Introduction
1.1 Welcome .................................................................................................................................................... 01
1.2 Use of Manual ............................................................................................................................................ 01
1.3 Service and Technical Support ................................................................................................................. 01
1.4 E-Bike Components ................................................................................................................................... 01
1.5 Technical Data ........................................................................................................................................... 03
2.Installation and Adjustment
2.1 Handlebar and Stem Assembly ................................................................................................................ 04
2.2 Assembly of the Pedals ............................................................................................................................ 05
2.3 Seat Posistion ............................................................................................................................................ 06
2.4 Saddle Height ............................................................................................................................................. 07
2.5 Saddle Adjustment .................................................................................................................................... 07
3.Battery and Charger
3.1 Overview .................................................................................................................................................... 08
3.2 General Remarks ....................................................................................................................................... 08
3.3 Installing and Removing the Battery ........................................................................................................ 08
3.4 Charging ..................................................................................................................................................... 08
4. Display ....................................................................................................................................................... 09
5.Recommendations and Maintenance
5.1 General Requirements ............................................................................................................................... 17
5.2 Maintenance Schedule .............................................................................................................................. 18
19
6. Warranty .................................................................................................................................................... 20
1.General Introduction
1.1 Welcome
Thank you for purchasing a Magnum electric bike and welcome to the Magnum Bikes family of e-bike
enthusiasts. We encourage you to join our Facebook group “Magnum Bikes Community” which you can
place for Magnum riders to ask questions, have discussions, share recommendations and experiences and
connect with other Magnum Bike enthusiasts.
1.2 Use of Manual
We encourage you to read this manual thoroughly before you take your new E-bike for a ride. It is important
not to overlook the safety instructions and explanations of both traditional and non-traditional bike parts,
as this will offer you a general understanding of your new E-bike. This manual is designed to help you get
the most out of your E-bike, and so we have attempted to answer as many of your potential questions as
possible. Please take a moment to read through the various sections before you get in the saddle.
1.3 Service and Technical Support
This manual is intended as a general overview of your new E-bike, and is therefore not an extensive refer-
ence. For technical support, including information about service, maintenance and repairs, please consult
your local Magnum dealer or our customer support team. You can visit our website (www.magnumbikes.
*Disclaimer
Because it is impossible to anticipate every situation or condition which can occur while riding, this manual
makes no representations about the safe use of bicycles under all conditions. There are risks associated
with the use of any bicycle which cannot be predicted or avoided, and which are the sole responsibility
of the rider. You should keep this manual along with any other documents that were included with your
bicycle. All content in this manual is subject to change without notice. Magnum Bikes makes every effort to
ensure accuracy of its documentation and assumes no responsibility of liability if any errors or inaccuracies
appear within. Assembly and initial adjustments of your Magnum e-bike requires special tools and skills. It
is recommended that this be done by a trained bicycle mechanic if possible.
General
01
1.General Introduction
1.4 E-Bike Components
1. Rear Light 8. Rear Disk Brake 15. Kickstand 22. Front Fender
2. Rear Fender 9. Bungee Cord 16. Crankset 23. Rim
3. Motor 10. Saddle 17. Pedal 24. Front Fork
4. Freewheel 11. Seatpost 18. Controller 25. Quick Release
5. Rear Derailleur Protector 12. Saddle Quick Release 19. Front Disc Brake 26. Tire
6. Rear Derailleur 13. Battery 20. Adjustable Stem
7. Carrier 14. Chain 21. Front Light
10
11
12
13
18
17
16
15
14
20
24
22
25
23
21
26
6
4
5
3
7
8
9
19
1
2
General
02
1. Left Grip 5. Diplay
2. Left Brake Lever 6. Shifter
3. Throttle 7. Right Brake Lever
4. Display Controller 8. Right Grip
1 2 3 4
5
6 7 8
Component Metro 750
Motor 48V, 750W, Bafang Rear Geared Hub Motor
Battery 48V, 20Ah, 960Wh Li-ncm
Display
Throttle Thumb Paddle Throttle
Front Fork Front Suspension with Lockout
Crankset Prowheel
Brakes Hydraulic Disc Brakes
Derailleur Shimano, 7-speed
Freewheel 7-speed
Tires 26” x 2.4”
Front Light Integrated and controlled from the display
Rear Light Integrated and controlled from the display
Max Loading¹ 275lbs
Max Speed² Cadence sensing PAS up to 25mph, trigger throttle up to 20mph
¹Max load includes the bike
²Can be configured to class 1, 2, or 3 e-bike
1.General Introduction
1.5 Technical Data
General
03
5mm
4mm
1. Open the top cover, align the stem with the head
tube and slide it on. Tighten the screw at the top of
the stem.
2. Align the handlebar to be perpendicular to the
wheel, then insert and tighten the two side-facing
screws as shown below.
5mm
Screw for adjusting the
handlebar position
3. Move the handlebar up or down to adjust to the
desired angle, then tighten the rear-facing screw at
the top of the stem to lock the handlebar in place.
4. Close the cover to complete installation and
adjustment.
2.Installation and Adjustment
2.1 Handlebar and Stem Assembly
Installation & Adjustment
04
2.Installation and Adjustment
2.2 Assembly of the Pedals
The “R” marked pedal is for the right (when facing the forward direction). For attachment to the crank,
tighten clockwise.
The “L” marked pedal is for the left. For attachment, tighten counterclockwise when facing directly.
First screw on the pedals by hand, then tighten with the wrench provided.
RL
L
R
Installation & Adjustment
05
2.Installation and Adjustment
2.3 Seat Position
To enable comfortable, fatigue-free and safe riding, the saddle and handlebar height should be adjusted to the
body size of the rider.
bottom position of the crank cycle. The toes must still be able to touch the ground comfortably.
Optimal
Installation & Adjustment
06
2.Installation and Adjustment
2.4 Saddle Height
The quick-release lever must require noticeable effort to put into fully closed position to prevent any unde-
sired movement while riding.
WARNING
An improperly closed quick release lever can open again or have limited ability to keep the saddle in place.
This may cause the saddle to suddenly drop into the seat tube, potentially leading to serious falls and injury.
MININSERT
There is a minimum insertion line marked on the seat post
(failure to observe the minimum insertion line can result
in serious injury); please ensure the seat post is always
inserted into the seat tube beyond this line (the line must be
inside the seat tube).
Loosen the quick release lever at the top of the seat tube,
determine the appropriate saddle height and tighten the
clamp.
The clamping force can be adjusted by adjusting the bolt on
the quick release lever.
The quick release lever must be closed with considerable
counter pressure.
2.Installation and Adjustment
2.5 Saddle Adjustment
back direction.
Loosen the bolt at the bottom (4).
Adjust the saddle tilt by pressing down on the front or rear
of the saddle
torso length and desired riding position.
Tighten the bolt (4) to secure the saddle.
Installation & Adjustment
07
3.Battery and Charger
3.1 Overview
A
B
C
D
E
F
Battery
Charging Socket
Battery Handlebar
Capacity Level Light
Power Button
USB Port (on some batteries)
WARNING
Please ensure that the battery is locked in place before use
A AC Plug¹
B Charger
C Charging Indicator
D Battery Plug
¹Type will vary
C
B
D
A
3.2 General Remarks
Stop charging the battery immediately if you notice anything unusual, such as smoke or a strange smell;
take out the battery and store it outside of the house, then take the battery to an authorized dealer or experi-
enced technician for service or replacement.
-
3.3 Installing and Removing the Battery
The battery has a lever (1) and is secured with a lock (2)
Unlock the battery and pull it out
Insert the battery into the frame until it stops
Remove the key from the lock (2). Ensure that the battery is well secured
2
1
2
1
3.4 Charging
-
ciently and can be harmful to the life of the battery
During charging, the charger’s LED light will be continuously red
Charging is completed when the charger’s LED turns green
Battery & Charger
08
Display
Powering ON/OFF
Press and hold the power button to turn on the display. A start-up screen (see image below) will display for
aproximately 2 seconds before entering the main interface showing real-time information.
To turn the display off press and hold the power button until the screen goes blank. The display will turn off
automatically if no operations are performed within the set sleep time, while the speed is 0, and current is
less than 1A. The sleep time can be set by the user in the settings interface.
Start-up Screen Main Interface
4. Display
4.1 Appearance
09
Display
Adjust Up
Mode Function
Adjust Down
Power On
4. Display
Indicators & Buttons
Button Functions
Walk Assist Indicator
Error Code
Battery Level Indicator
PAS Levels
Service Tool Connection
Bluetooth
Light Indicator
Power Output
Speed Mph
Trip Information &
Indicators
10
Display
4.Display
Pedal Assist Level
SPORT, TURBO, BOOST, and BOOST+. BOOST+ is indicated by a blinking BOOST icon. When PAS level is
empty it means pedal assist is off.
PAS levels do not switch in cycles. Meaning, after reaching the BOOST level pressing the up arrow will NOT
cycle the levels back to the beginning. The user must use the down arrow button to switch back down to PAS
off.
(Adjust up button)
(Adjust down button)
Adjust Up
Mode Function
Adjust Down
Power On
11
Display
Light Control
Long press the adjust up button to turn the headlight on and off. While the headlight is on the display’s
backlight is dimmed.
Speed Indication
The standard readout is real time speed, and can be switched to show average speed (AVG), and maximum
speed (MAX).
How to change speed readout...
4.Display
Trip, Odometer, & Range
speed greater than 0 the display screen will switch back to the main interface. The symbols below will indi-
cate which value is being shown.
ODO
TRIP
RANGE
Light On Indication Light Off Indication
12
Display
Battery Power
Battery power is shown by a battery bar indicator and percentage. The battery bar divides the power level into
5 bars. After battery capacity is lower than 5% the display enters low voltage mode. In this mode the battery
level shows 0 bars. The battery outline will start blinking after reaching 1Hz, and with no power output from
the motor, pedal assist will be disabled. The PAS level is displayed as OFF or 0. To get out of low voltage
mode the battery will need to be charged.
Walk Mode
Wehen speed is below 3mph long press and continue to hold the adjust down (down arrow) button to enter
walk mode. Upon entering walk mode the display will show a walk mode symbol and the real-time speed
while the PAS level displays as off (see image below). Release the adjust down button to exit walk mode. The
motor is turned off and the display returns to the main interface.
13
Display
Display Settings
The following description explains how users can access the settings options in their display.
Within 10 seconds of turning on the display, long press the M button to enter the settings interface.
long press the M button to set the option. Long press the M button again to exit to the previous page.
In settings short press the M button to enter the next level menu and long press the M button to exit and
return to the previous level menu.
4.4.1 KM/H and MPH
Hold UP (+) for 8 seconds to enter the unit of speed selection mode.
14
Display
15
Display
Error Code Table
-
If you still some questions about the display, please contact your Magnum dealer.
Error Code Denition Suggestion
“0x20” shown at speed Failure of controller Check controller
“0x22” shown at speed Failure of throttle Check throttle
“0x23” shown at speed Failure of motor’s phase wire Check motor
“0x24” shown at speed Failure of the motor’s hall Check controller
“0x30” shown at speed Communication failure Check connector to controller
Data Clearance
Whithin 10 seconds of turning on the display, when the display shows the TRIP interface, long press the M
To exit long press the M button. After clearance the subtotal mileage TRIP is 0, average speed is 0, and max
speed is 0. ODO information can not be cleared mannually on the display.
16
5. Recommendations and Maintenance
5.1 General Requirements
E-bikes use metal shells to cover the electric components, so we strongly advise against the use of exces-
sive water to wash the shells and parts around them. Use a soft cloth with a neutral solution to wipe the dirt
off the shells. Afterward, wipe everything dry with a clean soft cloth.
Do not use high-pressure water or air hoses for cleaning; this can force water into electrical components,
which may cause malfunctioning.
Do not wash plastic components with excessive water. When the internal electrical parts are affected by
water the insulator may corrode, leading to power-drain or other problems.
Do not use soap solutions to wash the metal components. Non-neutral solutions may cause discoloration,
distortion, scratching, etc.
Avoid leaving the bike outdoors
When not riding, keep the bike in a location where it will be protected from snow, rain, sun, etc. Snow and
rain can cause the bike to corrode. Ultraviolet rays from the sun can cause unnecessary fading of paint or
crack any rubber or plastic on the bike.
5.2 Maintenance Schedule
To keep your E-bike in optimal condition and your riding experience at its most enjoyable, we strongly
recommend following the suggested maintenance schedule. You should study it and allow it to become
second nature to your riding.
Recommended Torque Values
Front Wheel Nuts 22-27 Newton Meters 16.2—19.8 ft·lb
Rear Wheel Nuts 24-29 Newton Meters 17.5—21.3 ft·lb
Seat Binder Bolt 12-17 Newton Meters 8.8—12.5 ft·lb
Seat Post Clamp Nut 15-19 Newton Meters 11.0—14.0 ft·lb
Brake Anchor Nut 7-11 Newton Meters 5.1—8.1 ft·lb
Handlebar Clamp Nut 17-19 Newton Meters 12.5—14.0 ft·lb
Headset Expander Nut 17-19 Newton Meters 12.5—14.0 ft·lb
Crank Cotter Pin Nuts 9-14 Newton Meters 6.6—10.3 ft·lb
Brake Centre 2-17 Newton Meters 1.5—12.5 ft·lb
Recommendations & Maintenance
17
Maintenance Schedule Each Ride Weekly Monthly 6 Months Yearly
Tire Pressure X
Tire Condition X
Visual Inspection X
Brake Lever Pressure X
Quick Releases X
Handlebar Alignment X
Saddle Alignment X
Battery Pack Locked X
Wheel Check X
Inspect Frame Condition¹ X
Clean & Lubricate Chain X
Check Brake Pads X
Lubricate Forks X
Lubricate Cables & Housing X
Lubricate Folding Mechanism X
Check all Bolts & Torque Settings X
Clean Bicycle X
Charge Battery X
Check Heel Spokes X
Inspect Rim Condition X
Inspect Saddle, Rails & Clamp X
Grease Pedal Bearings X
Check Hub Bearings X
Check Headset Bearings X
Check Bottom Bracket Bearings X
Replace Brake Pads² X
Replace Brake Cables² X
Replace Tires² X
¹include welds for fissures, ²depends on use
As with all mechanical components, electrically power assisted cycles (EPAC) are subjected to wear and
high stresses. Different materials and components may react to wear or stress fatigue in different ways.
If the design life of a component has been exceeded, it may suddenly fail, possibly causing injuries to the
rider. Any form of crack, scratches or change of coloring in highly stressed areas indicate that the life of the
component has been reached and it should be replaced.
Warning
Recommendations & Maintenance
18
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