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MaintenanceTips & Cycling Knowledge
Handling Error Codes
1. Error Code E034: Throttle Fault
If your electric bike screen says E034, it means there's somethirng funky with the throttle.
why does it occur
Usually, it's either the throttle sensor acting up or it's not hookeed up rightLots of things can cause this, like hiccups during manufacturingor damagefrom a rough ride.
Troubleshooting
Here's what you can try
1. Throttle Sensor Wire Connection Error
Check the throttle sensor wire. Unplug it, then plug it back inIf the E034message disappears, it was probably just a bad connection. Easy fix, just makesure everything's snug.
2. Throttle Damage
If the E034 message sticks around even after you've checkedthe wire, it'slikely the throttle itself is busted. No worries, though! Just reach out to ourcustomer service team, and we'll send you a new throttle.
Please do the test according to the video
2. Error Code E037: Brake Abnormality
If you see error code E037 on the display screen, it indicates a brake abnormality.
Why does it occur
A common cause of this problem is a bad brake sensor cable connection, partly due to a faulty display.
Which cables are the brake sensor ones
The yellow labeled ones as shown in the picture below are the brake sensor cables, one on the left and one on the right.
Troubleshooting
1.Bad brake sensor cable connection
1.1Which sensor works unwell
Reconnect the left and right sense cable separately until the E37 code disappears（For example, if E37 disappears after disconnecting the left side the trouble point is on the left side.）
1.2.How to fix it
Remove the lever firstly and unscrew the ① fixing screw, then tighten or loosen the ②nut shown below until the E37 code disappear.
If you unplug the brake cables on both sides at the same time and the screen does not display E037, there is a problem with the brakes on both sides and need to be replaced.
2.Display fault
If both sides are unplugged at the same time and the display still displays E037, it means there is a problem with the display, You need to reset the display. You can reset the display by following these steps:
Long-press the "+" and "-" buttons to enter the display settings. Then, short-press the power button until you reach the P16 setting.
Long-press the "-" button for 5 seconds to restore the factory settings.
Once you've made the adjustments, long-press the "+" and "-" buttons again to save the changes.
If the display still displays E037 after resetting, then need to replace the display.
Please do the test according to the video
PS: If the problem persists, please contact the customer service team.
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MaintenanceTips & Cycling Knowledge
How to Replace Brake Pads
Brake pads on all electric bicycles are consumable parts that gradually wear down with long-term use. When worn to a certain extent, they can affect braking performance and even pose a safety hazard.Inspecting and replacing brake pads is crucial for every rider, as it directly impacts riding safety. This article will provide detailed guidance on the specific procedures for brake pad inspection and replacement.
Preparation for Inspection and Replacement
Brake pad replacement
Allen wrench
Needle-nose pliers
Disc brake pads wear down over time due to normal use. This can cause a slower brake response time and require more effort to press the brakes.
A squeaking noise from disc brakes is usually caused by contaminated brake pads. Even the slightest amount of oil, including from your skin, can damage disc brake pads. Minimize contact between the brake surface and bare skin whenever handling brake pads. If you do touch the pads, clean them with rubbing alcohol or a specialized product for disc brake pads. Then lightly sand the pads.
Brake Pad Inspection
Check your brake pads for shininess or visible wear. Inspect the pads by removing the wheel and examining the space where the rotor spins.
When inspecting brake pads, pay attention to the following key points:
Integrity: Ensure there are no chunks, dents, or missing parts. If there are, replace the damaged pads before your next ride.
Thickness: The pad material should be at least 1.5 mm thick. If you don't have a ruler, note that a grain of rice is about 1.5 mm thick (width, not length). If the pad is thinner than this, it’s time to replace it.
Cleanliness: The pads should be free of oil and other contaminants. If the pads are dirty, especially if they are oily (a significant safety hazard!), they need to be replaced.
Replace brake pads
Please refer to the Youtube video to install！
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MaintenanceTips & Cycling Knowledge
Ultimate Guide to Silencing Your Electric Bike's Noises
Many times, we find ourselves puzzled by squeaks or unexpected noises coming from our newly assembled or regularly used electric bicycles. These noises often stem from improper assembly or wear and tear of components over time, indicating potential issues. Addressing these problems early can prevent them from worsening in the future. If your electric bike starts making noises, it’s crucial to stop and check it before continuing your ride.
Why is my electric bike making strange noises?
Identifying the source of the squeaking is crucial. Here’s how you can diagnose and fix it, as there are many parts on a bike that can produce noise. Once you pinpoint the source, refer to the relevant component below.
Brakes
The contact between the wheel and the brake pads often causes squeaks. First, check if your wheels are properly secured in the dropouts, where the wheel axles attach to the bike frame. Misalignment can cause the wheel to rub against the brake pads. Remove the wheel, tighten the quick-release skewer, and securely fix it in the dropouts.
Chain
A squeaky chain is likely dry and in need of thorough cleaning and lubrication.
Crankset
If the crankset is the source of the noise, loose bolts might be the culprit. Grab the crank arms (the parts connecting the pedals to the bike) and twist them to see if they move side to side. If they do, tighten them using the appropriately sized hex wrench.
Derailleur
Dry pulleys can often cause the derailleur to squeak. Clean them thoroughly with a dry cloth, then apply a drop of lubricant to each pulley’s axle. Also, lubricate the derailleur’s pivots by turning the pedals.
Pedals
A common question is why the bike makes noise when pedaling. The pedals themselves might be the issue. Check if they are tightened securely or if the pedal threads are damaged. If the threads are damaged and you can’t tighten the pedals, replace them promptly.
Saddle
The rails connecting the saddle to the seat post can also be a source of squeaks. Tighten the bolts securing the saddle using an appropriately sized hex wrench. If the saddle tilts and squeaks, consider taking it to a nearby bike shop.
How to Fix Squeaky Bike Brakes?
Fixing noisy brakes on an electric bike is straightforward. Follow these steps to silence your brakes
Check the Brakes
It’s easy to determine if the front or rear brakes are at fault. During a ride, test the brakes individually. If the front brake is noisy, the sound will come from the left side. If the rear brake is noisy, the sound will come from the right side. If both brakes make noise, adjust both front and rear brakes.
Clean the Rotors
If possible, use rubbing alcohol to clean the disc brake rotors and wipe them with a clean cloth or towel. Clean the brake pads with a degreaser if they are still thick; if they are thin, replace them. After cleaning the brake pads, wait for them to dry completely before reassembling.
Replace Brake Pads
Replacing the brake pads follows the same steps for both the front and rear wheels. If your bike’s brakes are squealing when applied, the brake pads are likely worn out. Worn brake pads can’t grip properly and cause squealing, reducing braking efficiency.
Summary
These solutions will help you fix the squeaking noises on your electric bike, ensuring a smoother and more enjoyable ride. Regular maintenance and timely addressing of any noises can extend the life of your bike and make your rides more pleasant. With summer around the corner, hop on your perfect KINGBULL electric bike and explore the secrets of the summer forest!
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MaintenanceTips & Cycling Knowledge
Electric Bike Chain Care Guide: Maintenance Secrets for Prolonged Life and Enhanced Performance
When you own an electric bike, maintaining the optimal condition of its chain is crucial. The chain serves as the core of the electric bike's power transmission system, directly impacting the efficiency and smoothness of your ride. However, due to factors such as dust, humidity, and other natural elements encountered during daily rides, the chain is susceptible to contamination and wear. To ensure your electric bike consistently performs at its best, we present a comprehensive guide to chain maintenance and care. From simple cleaning techniques to regular lubrication recommendations, this guide will assist you in ensuring the good health of your electric bike's chain, allowing you to experience enhanced performance during your rides.
Why Chain Maintenance Is Necessary
Linking the need for chain maintenance to the performance and lifespan of an electric bicycle emphasizes the critical role of regular upkeep in maintaining an optimal riding experience. The chain is a fundamental component of the electric bicycle's power transmission system, directly influencing the smoothness of rides and overall performance. Regularly maintaining the chain not only ensures the proper functioning of the mechanical components of the electric bicycle but also significantly extends the overall lifespan of the vehicle. With increasing riding mileage, the chain is susceptible to external environmental factors, dust, and moisture, leading to contamination and wear. Through routine maintenance, we can effectively reduce friction resistance in the chain, improve power transmission efficiency, and thereby enhance the overall performance of the entire bicycle.
Good chain maintenance not only impacts riding comfort and efficiency but also directly contributes to the overall safety of the electric bicycle. In cases where the chain is damaged or significantly worn, it may lead to unexpected failures during rides and potentially harm other components of the transmission system. Therefore, incorporating chain maintenance into a regular maintenance routine is a necessary step to ensure the long-term efficient operation of the electric bicycle, providing riders with a more reliable, smooth, and safe riding experience.
Cleaning Frequency and Steps for the Chain
Cleaning the chain is a crucial step in maintaining an electric bike, directly impacting the smoothness of rides and the lifespan of the chain. Here are more detailed recommendations regarding the frequency and steps for cleaning the chain:
Frequency of Cleaning the Chain
The frequency of cleaning the chain should be determined based on the following factors:
Riding frequency: If you ride frequently, the chain is more exposed to dust, mud, and moisture, requiring more frequent cleaning.
Environmental conditions: Riding on muddy paths or in damp weather makes the chain more susceptible to contamination, necessitating more frequent cleaning.
Seasonal changes: In wet seasons, the chain is more prone to moisture, requiring more regular checks and cleaning.
In general, it is recommended to clean the chain every two weeks to a month. If your riding environment is more challenging, more frequent cleaning may be necessary.
The Steps to Clean the Chain
Cleaning the electric bike chain is a crucial step in maintaining the bike's overall condition. Here is a detailed guide on the steps and techniques for cleaning the chain thoroughly:
Preparation
Prepare Chain Cleaning Tools: If you have specialized chain cleaning tools, fill them with bicycle-specific degreaser. Wrap the tool around the chain following the instructions, ensuring the storage compartment is in the correct position. If you don't have specialized tools, you can use a brush (toothbrush or nail brush) as an alternative.
Pre-select Lubricant: Depending on the riding environment, choose between wet lubricant or dry lubricant to ensure effective lubrication under different conditions.
Removing Oil Stains from the Chain
Apply Degreaser: If using specialized tools, add degreaser to the tool. Then, use your other hand to backpedal, allowing the tool's brush to clean all corners and crevices of the chain while collecting degreaser in the storage compartment.
Use Brush for Cleaning: If you don't have specialized tools, apply degreaser to a brush (toothbrush or nail brush). Keep the brush on the top of the chain and then backpedal. Repeat this process on the bottom of the chain, ensuring you clean the chain links under the drivetrain.
Rinsing the Chain
Wash with Soapy Water: Use soapy water to wash the chain, ensuring the removal of excess degreaser and impurities.
Selecting and Lubricating the Chain
Choose Lubricant: Depending on the riding conditions, choose between wet or dry lubricant.
Apply Lubricant to the Chain: Carefully apply a small drop of lubricant to the top of each section of the chain. Ensure the lubricant aligns precisely with the rollers for optimal lubrication.
Wipe Off Excess Lubricant: Use a cleaning cloth to wipe off any excess lubricant from the chain, ensuring the chain's surface is dry.
Following these steps and techniques will ensure that your electric bike chain stays clean, lubricated, and prolongs its lifespan, enhancing overall riding efficiency and comfort.
Checking and Replacing the Chain
Regularly checking and replacing the chain ensures optimal performance of your bicycle and minimizes the potential impact of chain wear on other components.
Checking the Chain
Check Chain Tension: Ensure the chain tension is moderate. Too loose a chain may lead to chain derailment, while excessive tension can increase wear on gears and the chain.
Inspect Chain Wear: Examine the chain for visible signs of wear, such as elongation of chain links or teeth embedding into chainrings. Excessive wear may necessitate replacement.
Measure Chain Tension: Use a chain tension gauge to measure the tension of the chain. This helps determine if the chain is still within the normal working range.
Observe Chain Deformation: Pay attention to whether the chain is twisted or deformed. Deformation may indicate damage to the chain.
Check Chain Links: Ensure that the chain's connecting links or pins are not loose or missing. Any damaged links may lead to chain failure.
Replacing the Chain
Prepare Tools: Ensure you have the necessary tools, such as a chain breaker, chain quick-link tool, and a wrench.
Remove the Old Chain: Use a chain breaker or chain quick-link tool to remove the old chain from the bicycle.
Measure the New Chain Length: Use the new chain and ensure its length is suitable for your bicycle. You can use a chain breaker to adjust the length.
Install the New Chain: Attach the new chain to the bicycle, ensuring the correct connection of each chain link.
Adjust Chain Tension: According to the bicycle manufacturer's recommendations, adjust the tension of the new chain. Typically, you should maintain the chain slightly slack but not too loose or tight.
Connect the Chain: Use a chain quick-link tool or connecting pin to join the chain.
Lubricate the Chain: After installing the new chain, lubricate it to ensure smooth operation. Choose an appropriate lubricant and apply it to each link of the chain.
Test: After replacing the chain, conduct a brief test ride to ensure everything is functioning correctly.
Conclusion
Maintaining your electric bike's chain is not just about preserving a crucial component; it's a commitment to a smoother, safer, and more enjoyable riding experience. The comprehensive guide provided here, from understanding why chain maintenance is necessary to the intricacies of cleaning, lubricating, and replacing the chain, empowers you to take control of your electric bike's health.
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MaintenanceTips & Cycling Knowledge
How to Avoid Electric Bike Tire Punctures
Imagine meticulously planning a trip, preparing your electric bike, and packing all the necessary items. Everything seems perfect as you embark on your journey. However, just when you've barely begun, at the most inconvenient moment, you discover that your electric bike tire has gone flat. You're left feeling helpless, not knowing what to do...So, this article is designed to prevent such a situation from happening. It will elaborate on how to avoid electric bike tire punctures.
Electric bike tires are composed of several components:
Tire Tread
Tread Pattern: The bottom of the tire typically features various tread patterns, and the design of these patterns affects the tire's performance on different surfaces. For instance, mountain bike tires often have deep and rugged tread patterns to provide superior traction and stability. Commuter tires may have flatter tread patterns to reduce rolling resistance, while cargo bike tires may prioritize durability and stability.Sidewall: The sidewall is the tire's side, often bearing specifications and recommended pressure. The sidewall's structure can also impact the tire's performance and durability.
Inner Tube
The inner tube is the core component of the tire, typically made of rubber. It contains the inflated air, providing support and elasticity to the tire. The thickness and quality of the inner tube may vary depending on the type of tire.
Casing
The casing is a layer between the inner tube and the outer tire, often made of fiber materials such as nylon or polyester. The number of layers and material can influence the tire's structural strength and resistance to wear. For mountain electric bikes, a more robust casing is typically more suitable for tackling rough off-road trails.
Bead
The bead is located on both sides of the tire and serves to connect the tire to the wheel. Beads are usually made of steel wire or high-strength fibers to ensure a secure fit on the wheel rim.
Valve Stem
The valve stem is a small tube on the inner tube through which inflation and deflation occur. Different types of valve stems are used for various pressure systems, so it's important to match the correct valve stem type.
Causes of Tire Deflation
1.Sharp Object Puncture: This is one of the most common causes of tire deflation. Sharp objects such as glass shards, nails, thorns, or stones can puncture both the outer tire and inner tube, leading to gas leakage. Once the tire is punctured, the gas in the inner tube rapidly escapes, causing the tire to go flat. This affects ride stability and performance.
2.Inner Tube Aging and Wear: Over time, the inner tube undergoes aging and wear. The inner tube material becomes brittle and prone to cracks or small holes. Aged and worn inner tubes are more susceptible to deflation. Small holes or cracks may form on the inner tube, resulting in gas leakage.
3.Improper Tire Pressure: Incorrect tire pressure, whether too low or too high, increases the risk of tire deflation. Improper tire pressure subjects the inner tube to additional stress. Insufficient pressure can lead to the tire being squeezed, making it susceptible to sharp objects on the road. Excessive pressure may cause the inner tube to burst or damage the tire.
4.Improper Installation or Maintenance: Incorrect tire installation, removal, or maintenance can damage the inner tube or cause it to function improperly. Incorrectly installing the inner tube can trap it between the spokes and the outer tire, increasing the risk of inner tube damage. Improper maintenance can also result in inner tube damage or sealing issues.
5.Bead Issues: The tire bead is a critical component that connects the tire to the wheel. If the bead is damaged or improperly installed, it may not effectively seal the tire, leading to gas leakage even if the inner tube is not punctured or damaged.
6.Extreme Riding Conditions: Riding in extreme conditions, such as extremely high or low temperatures, adverse road conditions, or repeated impacts, can increase the risk of tire deflation. Tire materials and inner tubes are subjected to additional stress under extreme conditions, leading to deflation issues.
7.Overloading：Excessive load: exceeding the designed load range of the e-bike will increase the load and pressure on the tires, increasing the chance of a flat tire.
How to Properly Adjust Tire Pressure for Kingbull Electric Bike Tires
Owning an electric bike equipped with "fat tires" can offer a great riding experience, whether for city commuting or off-road adventures. However, maintaining the correct tire pressure is crucial. Adjust tire pressure according to different riding conditions for a better and more comfortable riding experience.
1.Soft Terrain (such as sand or snow): Keep the pressure between 18 and 20 PSI to ensure better traction and comfort.
2.Daily City Riding or Paved Roads: Maintain the pressure between 20 and 25 PSI to reduce rolling resistance and improve efficiency.
3.Heavy Loads or Long-Distance Riding: Keep the pressure between 25 and 30 PSI to ensure tire stability and durability.
Choosing the Right Electric Bike Tires for Different Types of Electric Bikes
Mountain Electric Bikes
Mountain electric bikes are typically used for rugged off-road and mountainous terrain. Therefore, selecting the right tires is crucial. Mountain electric bike tires are usually wider, with widths ranging from 2.2 inches to 2.5 inches, to provide ample contact area and enhance stability. Ensuring excellent traction and maneuverability across various terrains and conditions is important. Choose mountain bike tires with deep and rugged tread patterns and sturdy casings. This type of tire offers outstanding grip and slip resistance, suitable for uneven surfaces like dirt trails, mud, and gravel roads.
Commuter Electric Bikes
Commuter electric bikes are primarily designed for city riding, often on smooth road surfaces. Their tire widths typically range from 1.5 inches to 2.0 inches and feature flatter tread patterns to reduce rolling resistance. This design allows for swift and stable riding, enhances efficiency, and adapts well to urban road conditions. Commuter tires usually provide good stability and comfort, promoting a smooth ride.
Cargo Electric Bikes
Cargo electric bikes are used for transporting significant loads or passengers, demanding durable and stable tires. Sturdy cargo transport tires, with widths typically ranging from 2.0 inches to 2.5 inches, are suitable for carrying heavy loads. These tires feature robust sidewalls and wear-resistant tread patterns, ensuring adequate support and stability while accommodating substantial cargo.When selecting tires, it's essential to consider riding conditions such as weather, road surfaces, and usage. Different tire types and characteristics will provide the best riding experience in various circumstances.
Methods to Prevent Electric Bike Tire Deflation
Regular Tire Inspection: Perform tire inspections on a weekly basis or before every ride. Examine the tire's exterior for potential punctures, scratches, or foreign objects. If sharp objects are found, promptly remove them to prevent punctures. Pay attention to the tire's sidewalls and casing for visible signs of damage. Ensure that the tire's internal pressure falls within the manufacturer's recommended range. Proper inflation helps reduce the risk of tire deflation and provides better riding performance and comfort.
Choose Appropriate Tire Types: Selecting the right tire type is crucial based on the type of electric bike and your riding requirements. Different types of electric bikes require different tire types to meet their performance, stability, and comfort demands.
Avoid Riding in Harsh Conditions: Try to steer clear of harsh riding conditions, such as areas with sharp rocks, broken glass, or dense nails. Opt for smoother roads to minimize the risk of tire damage.
Use Leak-Preventing Materials: Tire sealant, often in the form of liquid or gel, is typically made of latex, polymers, or other high-molecular-weight materials. It is injected into the inner tube, filling the inner tube space. When the tire is punctured by sharp objects, these sealants are pushed into the small holes or cracks and rapidly solidify. This effectively seals the leaks, preventing gas leakage and maintaining tire pressure.Installation of tire sealant usually involves removing the inner tube, injecting the sealant, and then reassembling the inner tube. Ensure proper installation following the product instructions. While it can automatically repair tire deflation issues, it is still advisable to perform regular tire checks and maintenance for safe riding.
Summary
Understanding the composition of electric bike tires and the causes of deflation, as well as choosing the right tire type, is crucial for a smooth ride on electric bikes. Additionally, regular tire inspection and maintenance, along with adherence to preventive measures, will help reduce the risk of tire deflation.
超载：负载过大：超过电动自行车的设计负载范围，会增加轮胎的负载和压力，增加爆胎的机会。
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