Superpedestrian Recalls Electric Bicycle Conversion Wheels Due to Fall and Crash Hazards (Recall Alert)

What was recalled

In the summer of 2017, the U.S. Consumer Product Safety Commission (CPSC) issued a recall alert concerning a specific line of electric bicycle conversion wheels manufactured by Superpedestrian. This product, known as the Copenhagen Wheel, was designed to transform a standard manual bicycle into an electric-assist vehicle, making commuting and recreational riding more accessible for users who might otherwise find pedaling uphill or against the wind challenging. The recall does not cover every wheel ever made by the company, but rather targets specific batches of units that were sold during a defined period in 2017. It is important to understand exactly which physical items are affected, as the risk is tied to the manufacturing date and serial number range of these particular conversion kits.

The recalled products are the Copenhagen Wheel electric bicycle conversion wheels, identifiable by their distinctive red hub housing all internal components and a white Superpedestrian logo. These wheels were engineered to be compatible with two common wheel sizes: 26 inches and 700c (approximately 28 inches). The hazard is not inherent to the design of the Copenhagen Wheel as a whole, but rather to the rear axle mechanism found in specific serial number ranges. Consumers who purchased these wheels between January 2017 and July 2017 need to check their device carefully. The recall affects two distinct categories of wheels based on gear configuration: multi-speed wheels and single-speed wheels.

For those who own the multi-speed version, the affected serial numbers begin with 010317 and range from 01031708600020000000 through 01031710400250000000. If you have the single-speed variant, the serial numbers start with 020317 and fall between 02031708600020000000 and 02031710400250000000. The serial number can be located on the wheel’s user interface panel, situated just above the axle. Because the failure involves the rear axle, it is critical to verify this number before assuming your specific unit is safe or unsafe. No other models or serial ranges from Superpedestrian were included in this specific recall action.

While the CPSC record does not provide a comprehensive breakdown of every retailer or geographic region where these wheels were sold, it confirms that the units were distributed widely enough to warrant a federal alert. The primary point of sale for many of these devices was directly through Superpedestrian’s own channels, though they may have been available through other bike shop partners during that timeframe. If you are unsure when or where you bought your wheel, checking your original receipt or email confirmation from 2017 is the best first step. The key takeaway is that if your Copenhagen Wheel falls within those specific serial number brackets, it is part of a known safety issue that requires immediate attention.

The hazard, explained

At the core of this recall is a critical structural failure within the rear wheel assembly of the Superpedestrian Copenhagen Wheel. Specifically, the issue lies with the rear axle—the sturdy rod that runs through the center of the wheel and connects it to your bicycle’s frame. In normal operation, this axle must withstand significant rotational force from pedaling, lateral pressure from turning, and the constant vibration of riding on any surface. The recall notice indicates that the axle in these specific units can fail unexpectedly. When a metal axle fractures or snaps under load, the physical connection between the wheel hub and your bike frame is instantly severed.

What happens next is immediate and dangerous. Because the Copenhagen Wheel is designed to convert a standard bicycle into an electric bike, it replaces your entire rear wheel. This means the motor, battery, and drive mechanism are all integrated directly into that single rotating unit. When the axle fails while you are riding, the wheel can detach from the frame or become completely unresponsive. For a rider moving at even moderate speeds, losing control of the rear wheel is equivalent to hitting a sudden, invisible wall. The bike may jerk violently to one side, lock up, or simply collapse beneath you.

This type of mechanical failure poses a dual threat: falling and crashing. When the support structure fails, gravity takes over instantly. Riders are likely to be thrown from the saddle, often landing on their hands, knees, or head. Because electric bicycle conversion wheels add weight to the rear of the bike, the momentum generated during a fall can be more severe than with a standard bicycle. The rider has little time to react because the failure is not gradual; it is a sudden loss of structural integrity. There is no warning squeak or wobble beforehand—just an abrupt transition from riding to falling.

While no incidents have been reported to the CPSC for these specific serial numbers, the physics of the hazard are clear. A failed axle eliminates the rider’s ability to steer, accelerate, or brake effectively through that wheel. In traffic, this unpredictability can lead to collisions with vehicles, pedestrians, or stationary objects. Even on a quiet path, the fall itself carries a high risk of fractures, concussions, or road rash. The hazard is not just about the bike breaking; it is about the rider losing control at the most critical moment, leaving them vulnerable to injury from both the mechanical failure and the resulting impact.

Understanding this mechanism underscores why the remedy is so urgent. You cannot "ride around" a broken axle. Once that component fails, the wheel is no longer safe for use under any circumstances. The design of the Copenhagen Wheel, with its components housed inside the red hub, does not allow for user repair of the internal axle. This is a factory-level defect that only a replacement unit can resolve. Recognizing the severity of the physical failure helps explain why the company and the CPSC are insisting on an immediate stop to use, rather than a gradual phase-out.

Who is most at risk

The primary group at risk for this recall consists of individuals who have purchased and installed the Superpedestrian Copenhagen Wheel on their personal bicycles. This product is not a standalone vehicle but rather a conversion kit designed to transform a standard, non-electric bicycle into an electric one. Therefore, the people most immediately vulnerable are those who own compatible bicycles—specifically those with 26-inch or 700c (approximately 28-inch) wheel sizes—and have taken the step to integrate this red-hubbed device into their daily commute or recreational riding. Because the conversion wheel replaces or augments the rear wheel, anyone who rides a bike that has been modified with this specific Superpedestrian technology is potentially exposed to the hazard described in this recall.

While the mechanical failure of the rear axle poses a significant physical danger to any rider, certain demographics may face heightened consequences due to their physical resilience and riding patterns. Adults who rely on these converted bicycles for daily transportation are particularly at risk because they often ride in mixed traffic environments, navigating streets alongside cars and other vehicles. A sudden loss of structural integrity in the rear wheel during motion can lead to a catastrophic fall, resulting in serious injuries such as fractures, head trauma, or road rash. The unpredictability of an axle failure means that riders have little to no time to react, making the severity of potential accidents quite high for active commuters.

Elderly individuals and those with reduced physical stability are also among the most vulnerable populations in this scenario. As we age, bone density often decreases, and reflexes may slow down. A fall caused by a mechanical failure is far more likely to result in hip fractures or other debilitating injuries for older adults than for younger, more agile riders. Furthermore, if children or teenagers are permitted to ride bicycles equipped with these conversion wheels, they too are at significant risk. Younger riders may have less experience balancing on heavier, electric-assisted bikes and might be less capable of managing a sudden crash. The added weight and complexity of an electric conversion wheel can also alter the handling dynamics of a standard bike, potentially catching inexperienced riders off guard if the axle fails.

It is important to note that while no incidents have been reported to date, the potential for harm exists whenever the bicycle is in use. The risk is not limited to high-speed riding; even at low speeds or when maneuvering around obstacles, a compromised axle can cause the wheel to collapse or detach. This means that every instance of riding a bike fitted with these specific serial numbers carries an inherent danger. Therefore, the "who" is not just defined by age or physical ability, but by anyone who continues to ride a bicycle modified with this specific Superpedestrian product without having it replaced. The vulnerability lies in the combination of the silent mechanical failure and the reliance on that wheel for balance and propulsion.

How to tell if you have the recalled item

If you own an electric bicycle conversion kit, verifying whether your specific unit is part of this recall requires a close and careful inspection of the hardware itself. Because Superpedestrian products are designed to be integrated into existing bicycles, they do not always look like traditional "electric bikes" with bulky frames and batteries. Instead, the technology is hidden within the wheel assembly. To determine if your bike is affected, you must first confirm that you have a Superpedestrian Copenhagen Wheel. You can identify this product by looking at the rear wheel of your bicycle. The most distinctive visual marker is the red hub located in the center of the wheel. All internal components are housed inside this red housing, and you should look for the Superpedestrian logo printed in white directly on the side of this hub.

While the visual identification helps narrow down the brand, the definitive proof that your wheel is subject to this recall lies in its serial number. The CPSC has specified exact ranges of serial numbers that are at risk due to potential rear axle failures. You will not find this number on a sticker on the box or the frame; it is located on the wheel's user interface panel. This panel is positioned just above the axle at the center of the wheel. It is crucial that you read these numbers carefully and compare them against the specific ranges provided in the recall notice.

Your wheel is part of this recall if its serial number falls within either of the following two groups, depending on whether your conversion kit is designed for a multi-speed or single-speed bicycle:

• For Multi-Speed Wheels: The serial number must be between 01031708600020000000 and 0103171040025000000.
• For Single-Speed Wheels: The serial number must be between 02031708600020000000 and 0203171040025000000.

It is also helpful to know the physical specifications of the recalled items to ensure you are looking at the right product. The Copenhagen Wheel is designed to convert a standard bicycle into an electric bike and is compatible with two specific wheel sizes: 26 inches and 700c (which is approximately 28 inches). If your wheel does not match these size specifications or if the logo is not white on a red hub, it may be a different model. However, if you have confirmed the brand, the red hub with the white logo, and your serial number falls within the ranges listed above, you possess a recalled item.

If you are unsure about how to read the serial number or if the panel is obscured by dirt or debris, it is best to clean the area gently around the axle to get a clear view. Do not attempt to remove the wheel or disassemble the hub yourself to find this information, as doing so could void your remedy or cause further damage. Once you have confirmed your serial number matches one of the affected ranges, please stop using the wheel immediately and proceed to the remedy steps outlined in this article.

What to do — step by step

Your refund, repair, or replacement options

If you have identified that your electric bicycle conversion wheel falls within the scope of this recall, the good news is that Superpedestrian has established a straightforward and fully covered remedy to address the safety concern. You do not need to worry about the cost of fixing this issue. The company has committed to providing a free replacement electric bicycle conversion wheel to all affected consumers. This generous offer includes the cost of shipping the new unit to your door, meaning you will not be charged for either the part itself or the logistics required to get it to you. This approach is designed to remove any financial barrier that might prevent you from correcting the hazard, ensuring that safety remains accessible regardless of your budget.

To initiate this process, you have two convenient options for contacting Superpedestrian directly. You can reach their dedicated support team by placing a collect call to 617-945-1604. It is important to note the specific hours of operation for this line: they are available from 10 a.m. to 5 p.m., Eastern Time, Monday through Friday. If you prefer to handle matters digitally or if calling during those hours is difficult for your schedule, you can also visit Superpedestrian.com and navigate to the "Support" section. Clicking on this link will provide you with the necessary online resources and forms to request your replacement. Both methods are official channels established by the company to ensure your request is processed correctly and quickly.

When you make contact, whether by phone or online, be prepared to provide specific details about your product to verify that it is indeed part of this recall. As mentioned in the description, the affected units are the Copenhagen Wheel electric bicycle conversion wheels with specific serial number ranges. For multi-speed wheels, the serial numbers fall between 01031708600020000000 and 0103171040025000000. For single-speed wheels, the range is from 02031708600020000000 to 0203171040025000000. Having this information ready will help the support team confirm your eligibility for the free replacement without unnecessary delay. The goal is to get you a safe, functioning wheel as soon as possible so you can return to enjoying your ride with peace of mind.

While you wait for your new wheel to arrive, it is crucial that you continue to refrain from using the recalled product. The remedy is in place to provide a permanent fix, but the interim period requires caution. Do not attempt to repair the axle yourself or seek third-party repairs, as this could void any warranty or complicate the replacement process. Instead, let Superpedestrian handle the technical aspects of the solution. Their commitment to covering all associated costs reflects their responsibility for the defect and their dedication to customer safety. By following these steps, you ensure that you receive exactly what you are entitled to under this recall alert.

What can happen if you ignore it

It is completely understandable why you might hesitate to stop using a beloved piece of technology like the Copenhagen Wheel. You have likely grown accustomed to the ease of pedaling up hills or cruising through your neighborhood with less effort. The thought of removing a functional-looking component, dealing with shipping logistics, and waiting for a replacement can feel like an unnecessary inconvenience, especially when the wheel still appears to be working perfectly fine. However, ignoring this recall is not just about missing out on a free upgrade; it is about exposing yourself to a silent, mechanical failure that offers no warning before it happens.

The core issue lies in the rear axle, which serves as the critical structural link between your bicycle frame and the powerful motor housed inside the red hub. When this axle fails, it does not typically degrade gradually in a way that allows you to notice wear and tear. Instead, it can snap or shear unexpectedly under normal riding conditions, such as when accelerating from a stop, climbing a slight incline, or hitting a bump in the road. Because the failure is sudden, you will have no time to react. The immediate consequence is a loss of control over the rear wheel, which is the primary steering and stability component for most riders. This can cause the bike to jerk violently to one side or collapse underneath you, leading directly to a fall.

The physical risks associated with these falls are significant and vary depending on your speed, location, and riding environment. If you are falling at even moderate speeds, such as 10 to 15 miles per hour, the impact can result in serious injuries including fractures to the wrists, collarbones, or hips, as well as concussions or other head trauma if you are not wearing a helmet. Even with protective gear, the force of an uncontrolled crash against pavement or concrete is substantial. Furthermore, the danger extends beyond just you. If you lose control while riding on a busy street, in a bike lane shared with cars, or on a crowded sidewalk, you become an unpredictable obstacle for others. This increases the likelihood of a collision with vehicles, other cyclists, or pedestrians, potentially causing harm to innocent bystanders as well.

While the Consumer Product Safety Commission notes that no incidents have been reported for this specific batch of wheels, the absence of reported injuries does not mean the risk is low; it simply means we are relying on the mechanical reality of the defect rather than historical data. The potential for harm is inherent in the design flaw itself. By continuing to ride, you are essentially gambling with your safety every time you mount the bike. You are betting that the axle will hold until you decide to get a replacement, but mechanical failures do not respect schedules or good intentions. The peace of mind that comes with knowing your equipment is safe is worth far more than the temporary hassle of arranging a repair.

Additionally, ignoring the recall means you miss out on the opportunity to have this issue resolved by the manufacturer at no cost to you. Superpedestrian has acknowledged the defect and is providing free replacements, including shipping. By acting now, you ensure that your electric bicycle conversion wheel is structurally sound and reliable for years to come. Waiting until a failure occurs could leave you with a damaged bicycle, potential medical bills, and the stress of filing an insurance claim or dealing with legal complexities after an accident. The smartest, safest choice is to treat this recall as a proactive measure rather than a reactive crisis management task. Your safety is not something to be compromised for convenience.

Staying safe: broader tips

While this specific recall addresses a critical failure in the rear axle of Superpedestrian’s Copenhagen Wheel, the incident highlights a broader truth about modern mobility: as bicycles become more complex, they require more vigilant maintenance. Electric bicycle conversion kits are fascinating pieces of engineering that allow you to transform a standard bike into an e-bike, but they introduce high-torque motors and heavy batteries into a frame not originally designed for them. This added stress can accelerate wear on components that were never meant to handle such forces. To stay safe with any powered cycling equipment, it is essential to view your bike as a dynamic machine that requires regular professional check-ups, not just occasional tune-ups.

First, prioritize the integrity of your wheel hubs and axles. These are the load-bearing heart of your bicycle. Whether you have a factory-installed electric bike or a conversion kit, inspect your wheels regularly for any signs of unusual noise, wobble, or resistance. If you hear clicking, grinding, or feel a sudden change in how the wheel spins, stop riding immediately. Do not assume it is just dirt or debris; internal bearing failures can happen without warning and lead to catastrophic loss of control. Consider scheduling an annual inspection with a certified bicycle mechanic who specializes in electric bikes. They can torque check your axles, inspect the motor housing for cracks, and ensure that the mounting hardware is secure according to manufacturer specifications.

Second, always respect the weight limits and compatibility guidelines provided by the manufacturer. Conversion kits often come with specific requirements regarding frame material, wheel size, and rider weight. Overloading your bike or using it on terrain that exceeds its design parameters puts immense strain on the electrical and mechanical systems. For instance, riding a conversion kit over rough trails or carrying heavy cargo can cause heat buildup in the motor or stress fractures in the axle. Always read the manual thoroughly before installation and use. If you are unsure whether your specific bike frame is compatible with a particular conversion kit, consult the manufacturer directly or seek advice from a qualified bike shop owner.

Finally, make it a habit to check for product safety alerts regularly. The U.S. Consumer Product Safety Commission (CPSC) and other regulatory bodies issue recall notices for a wide variety of consumer goods, from children’s toys to home appliances. Many people only think about recalls when something has gone wrong, but proactive awareness is the best defense. Visit CPSC.gov or sign up for email alerts relevant to your household interests. By staying informed, you can act quickly to remedy potential hazards before they result in injury. Remember, safety is not just about reacting to problems; it is about building habits that prevent them from happening in the first place.