FAQs Page

Frequently Asked Questions

Please take a look at the sections below to find the answers you’re looking for. If you can’t find what you’re looking for or have additional questions, please don’t hesitate to contact us. We’re always here to help!

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Last updated: Sep. 2025

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FAQ

Purchase

How long will it take for me to receive the electric bike l purchased?

●Processing time:

Normally, it takes 1-2 business days. We strive to process your order as quickly as possible to ensure timely delivery.

●Shipping time:

Shipping from Polish warehouse: 3~7 working days
Shipping from China: 30~50 working days

Please note that these are estimated shipping times and may vary depending on your location and customs procedures.

Are customs fees included in the price of Shengmilo E-bikes?

No, there are no additional fees. Shipping and taxes for electric bikes are included in the price.

Where does the electric bike shipping originate and where is it delivered?

We currently offer free delivery services to 26 regions in the EU mainland and 48 regions in the continental United States. This does not include Hawaii, Alaska, Guam, Puerto Rico, or any other US territories, as well as EU island regions. Shipping costs are covered by Shengmilo.

Delivery Times:

EU: 4-7 business days
UK: 10-15 business days
USA: 3-7 business days

Do electric bikes need to be assembled?

Electric bikes arrive partially assembled and require a few additional steps to complete the assembly. Please carefully watch the assembly tutorial or refer to the electric bike user manual for installation instructions. Assembly Tutorial.

How can I track my order?

You can track your order via the link at the top and footer of our website, which offers real-time order logistics tracking. This feature allows you to stay updated on the status of your Shengmilo electric bike shipment at all times.

Cycling

How long will it take for me to receive the electric bike l purchased?

You can read the electric bike buying guide or use the model comparison to choose the one that is most suitable for you.

How can I maximize the battery life of my Shengmilo E-bike?

To maximize the battery life of your Shengmilo e-bike, charge the battery regularly, even if you haven't used the bike for a while. Avoid exposing the battery to extreme temperatures, and store it in a cool, dry place when not in use. Additionally, try to maintain a steady pedaling rhythm and avoid excessive throttle use to conserve battery power.

What preparations do I need to make before cycling?

Please carefully read our electric bike user manual before cycling. If necessary, you can also refer to our blog for cycling safety guidelines.

What is the maximum weight capacity for Shengmilo E-bike?

The maximum weight capacity is 150 kg (330 lbs). Always ensure that the total load (including rider and cargo) on your e-bike does not exceed the recommended weight limit.

Maintenance and Troubleshooting

How often should I service my Shengmilo E-bike?

We recommend servicing your Shengmilo electric bike at least once a year or every 1,000 miles (1,600 km), whichever comes first. Regular maintenance, such as lubricating the chain, checking tire pressure, and tightening bolts, can help extend the life of your e-bike and ensure optimal performance.

What should I do if the bike doesn't start?

Please check the cables to ensure they are not loose or disconnected. Simply loosen the black spiral wire cover until the quick disconnect plug is exposed, unplug it, and then reconnect it.

Troubleshooting guide.

1. Brake Malfunction
Check if the brake cables are loose or damaged. If not, consider replacing the brake caliper or brake lever and cable.

2. Assist Sensor Malfunction

Step1: Check if the sensor wires are loose or detached. If not, it may indicate a faulty assist sensor. Step2: Disassemble and replace the assist sensor.

3. Walk Assist Mode Error
Turn off and restart the electric bike (if the issue persists, consider replacing the controller).

4. Real-Time Mode Error
Turn off and restart the electric bike (if the issue persists, consider replacing the controller).

5. Low Voltage Error
Step 1: Remove the battery and check if it has sufficient charge. Step 2: Charge the battery. Step 3: If the issue remains after completing the first two steps, it may indicate a faulty motor. Replace the motor.

6. Motor Malfunction
Check if the motor connection wires are loose, detached, or plugged in incorrectly (if not, it may indicate a faulty motor, consider replacing the motor).

7. Twist Throttle Malfunction
Check if the connection wires are loose or detached (if not, it may indicate a faulty twist throttle, replace the twist throttle).

Brake Pad Replacement Guide

Tools Needed: Needle-nose pliers, hex wrench, replacement brake pads.

1. Removing the Brake Pads

a. Prepare the bike for maintenance. Start by turning off the bike and removing the battery.

b. Locate the brake pads. The brake pads are located inside the brake caliper on each wheel (refer to the photo).

c. Begin by removing the brake caliper. Use a hex wrench to remove the two brake caliper bolts from the bike frame (caution: be careful not to lose or misplace the washers inside the brake caliper bolts).

d. Carefully straighten the retaining pin with needle-nose pliers to remove the brake caliper bolts. Push up on the brake caliper.

e. Remove the old brake pads. Depress the spring plate to release the retaining pins and old brake pads.

2. Installing Brake Pads

a. Install the new brake pads into the brake caliper. Assemble the brake pads in the same configuration as the old ones. The friction material should be facing each other. Ensure that the top holes of each pad align with the retaining pin holes. Slide the new brake pads into the caliper to complete the installation.

b. Replace the brake pad retaining pins. Carefully bend the retaining pins to a 90° angle with needle-nose pliers to secure the brake caliper.

c. Reinstall the caliper. Position the caliper, aligning the mounting holes on the frame with the mounting points on the caliper. Insert the bolts with a hex wrench and tighten them evenly.

d. Before riding, reinstall the battery and test the brakes to ensure proper installation.

Brake Adjustment (Loose/Tight)

Tip: The best way to maintain brakes is to use both brakes simultaneously and engage the rear brake first to avoid excessive front wheel and fork tightening.

Brake adjustment includes:

· Check the wheels to ensure they are securely fastened in the frame dropouts. Improper wheel installation can cause the brake rotor to rub against the brake pads and create noise.

· Inspect the brake rotor for flatness and good condition. Damaged or dirty brake rotors can result in decreased braking performance or noise.

· Center the brake caliper by adjusting its positioning, bringing the inner pad (fixed part of the brake caliper) close to and parallel with the brake rotor. Incorrect brake pad or caliper positioning can lead to decreased braking performance or noise.

· Adjust the brake cable tension and check the brake lever. These final adjustments will help ensure properly adjusted brakes.

Crankset Replacement Guide

Prepare the bike for maintenance. Remove the battery and hold the power button for 10 seconds to discharge any remaining power.

1. Start by removing the left crank arm. Loosen the bolt with a hex wrench, then insert a crank puller tool to remove the crank arm.

2. Follow the same steps for the right-side crank arm, first remove the bolt with a hex wrench, then insert the crank puller tool into the opening.

3. Test the chain after installing the new crankset. The bike needs to be supported on a stand to elevate the rear wheel, and the crank must be rotated backward to rotate the rear wheel. Ensure the chain is properly connected to the chainrings.

PAS Sensor Replacement Guide

PAS Sensor Troubleshooting

1. Crank Removal (Refer to Crank Removal Guide)

a. Locate the PAS sensor behind the left pedal and check for any looseness.

b. If the PAS sensor is not loose, follow the cable from the PAS sensor to the connector.

c. Disconnect the PAS sensor connector and remove the controller.

d. Check for any loose connections between the controller and PAS sensor.

e.Inspect the connector for dirt, damage, or moisture. If there is dirt, damage, or moisture inside the connector, the sensor may need to be replaced.

2. PAS Sensor Replacement

a. Remove the old PAS sensor by disconnecting the cable from the main controller and loosening it.

3. PAS Sensor Installation

a. Install the new sensor, ensuring that the side with an arrow is facing towards the bike.

b. Reinstall the battery and perform a comprehensive test before riding.

Wiring Cable Troubleshooting

The wiring harness connects various electrical components on the bike. If the Shengmilo product supports indicating performing a wiring harness connector check, follow these steps to ensure the connectors are properly inserted and functioning.

Tools Needed: Hex wrench.

Prepare the bike for maintenance. Remove the battery and hold the power button for 10 seconds to discharge any remaining power. Flip the bike over and place it on the handlebars to prevent damage to the LCD display during maintenance.

1. Locate and remove the controller.

2. Check for loose connections in the wiring harness and reconnect them. When disconnecting the connectors, they must be pulled straight apart without twisting. If the interior looks normal, align the inner notch and pin and press them together directly without twisting.

3. Reinstall the controller following the above steps.

4. Reinstall the battery and perform a thorough test before riding.

Handlebar Grip and Stem Replacement Guide

Tools Needed: Pliers, hex wrench.

1. To remove the handlebars, start by loosening the handlebar clamp bolt.

2. Pry off the handlebar grip and slide it off the handlebars.
To remove the stem: Loosen the side bolts on the stem and then remove the center bolt from the stem. Then pull the stem off the fork.

Odometer Replacement Guide

Tools Needed: Hex wrench.

LCD Display Removal:

1. Prepare the bike for maintenance. Remove the battery and hold the power button for 10 seconds to discharge any remaining power.

2. Disconnect the LCD display connector. Follow the cable from the back of the LCD display to the wiring harness.

3. Pull apart both ends (without twisting) to disconnect the LCD display from the connecting cable.

4. Remove the LCD display. Use a hex wrench to loosen the bolts securing the LCD display, then pull it off the handlebars.

5. Remove the odometer controller. Loosen the clamping bolt with a hex wrench and remove it.

Brake Lever Replacement Guide

1. To remove the brake lever, first loosen the brake cable on the brake caliper.

2. Depress the control lever to expose the internal mechanism, then loosen the brake cable cover on the control lever.

3. Next, disconnect the cable from the brake caliper by pulling it, and loosen the bolt on the lever to remove it.

Brake Rotor Replacement Guide

1. Remove the wheel first, then remove the brake rotor (refer to the wheel replacement guide for assistance).

2. Use a hex wrench to remove the five bolts that secure the brake rotor to the wheel, then simply lift off the brake rotor.

Wheel and Fork Replacement Guide

Fork Removal:

1. Remove the bolt connecting the fork to the rear fork.

Front Wheel Removal:

(Operations similar to the initial installation of the wheel)

1. Flip the bicycle and stabilize it on the handlebars.

2. Use a wrench to loosen the two front wheel bolts on both sides. Locate and loosen the front wheel bolts, then remove them with a wrench.

3. Remove the front wheel. Lift the front wheel gently off the front fork.

Rear Wheel Removal:

1. Flip the bicycle upside down, remove the fork (as mentioned above), and then unscrew the bolt connecting the rear wheel.

2. Cut the tie wrap and disconnect the motor wires.

3. Remove the derailleur and lift the rear wheel. Separate the rear wheel by removing the brake rotor (refer to the brake rotor replacement guide).

Shifter Replacement Guide

1. To remove the shifter, cut off the end of the shifter cable and release it from the derailleur.

2. After removing the brake lever, throttle, and brake lever (refer to the brake lever, throttle, and brake lever replacement guide), unscrew the bolt from below the shifter, then slide it out and remove the shifter cable with the housing.

3. When installing a new shifter, insert the cable into the groove and push it in.

Taillight Replacement Guide

Cut the tie wrap to loosen the connection wires, then pull and remove it. Then unscrew the bolt at the back of the taillight to remove it.

Throttle Replacement Guide

1. To remove the throttle, the handlebar must be removed first (refer to the handlebar replacement guide).

2. Loosen the bolt and disconnect the wires connecting to the throttle. Pull down the throttle from the handlebar to remove it.

Throttle Replacement Guide

1. To remove the throttle, the handlebar must be removed first (refer to the handlebar replacement guide).

2. Loosen the bolt and disconnect the wires connecting to the throttle. Pull down the throttle from the handlebar to remove it.

Derailleur Replacement Guide

1. Push the derailleur forward to release the chain from the crank.

2. Unscrew the outer chip from the derailleur and release the chain from the derailleur.

3. Unscrew the bolt of the derailleur's jockey wheel.

4. Unscrew the center bolt that connects the derailleur to the bicycle to remove it.

5. After removal, loosen the bolt that secures the derailleur cable and unscrew the derailleur cable from the derailleur.

Installation Guide:

1. When installing, first attach the derailleur to the bicycle.

2. Next, install the middle chip and thread the chain over it.

3. Install the outer chip, aligning the chain over it as shown.

4. Finally, insert the derailleur cable into the derailleur and tighten it.

Technical

Headlight Replacement GuideUnscrew the headlight bolt from the front fender and disconnect the wires to remove the headlight.

Headlight Replacement Guide

Unscrew the headlight bolt from the front fender and disconnect the wires to remove the headlight.

Derailleur Adjustment Guide

1. Prepare the bike for maintenance. Remove the battery and hold the power button for 10 seconds to discharge any remaining power.

2. Test the alignment. Rotate the pedals forward while shifting with one hand. When using the derailleur, ensure the chain smoothly moves to each gear. Test by rotating the wheel one or two full turns at a time.

a. The shifter cable tension may be too tight. Loosen the barrel adjuster on the derailleur. Rotate the barrel adjuster on the derailleur half or full turn to loosen it.

b. The derailleur cable may be too loose. Tighten the barrel adjuster on the derailleur. The derailleur barrel adjuster should rotate half to full turn.

3. Switch between all gears to test alignment. Rotate the crank forward with one hand while adjusting the gears. Ensure the derailleur smoothly moves the chain from 1st gear to 7th gear.

4. Reinstall the battery and perform a thorough test before riding.