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Magnum Cosmo Common Problems and Troubleshooting

When it comes to electric bikes, the Magnum Cosmo stands out for its sleek design and commendable performance. However, even with its standout features, every bike model may encounter certain issues. Despite the Cosmo’s minimalist yet functional design, owners may still encounter common problems that need addressing.

One distinctive feature of the Magnum Cosmo is its low-step frame, offering both style and convenience for riders. This design facilitates easy mounting and dismounting, particularly beneficial for those with mobility concerns. Yet, despite its user-friendly design, the Magnum Cosmo may face technical hitches that require troubleshooting.

Additionally, the powerful 500 Watt motor and 10Ah battery provide impressive performance, promising a satisfying riding experience. Coupled with features like the integrated lighting system, LCD display, and ample cargo space, the Magnum Cosmo ensures a smooth and enjoyable ride. Nonetheless, despite these advancements, users may still encounter operational issues that demand attention and resolution.

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Specifications

Price	$1,699.00
Type	eBike
Class	Class 1,2,3
Release Year	2023
Brake Type	Mechanical Disc Brakes
Drive Type	Hub-Drive
Frame Material	Aluminum
Gears	6
Max Range (mi)	40 mi
Top Speed (mph)	25 mph
Watts	500
Weight (lbs)	57 lbs
Wheels	2
Wheel Diameter (in)	26 in
Wheel Width (in)	3 in

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Features

• Commuter
• Leisure
• Headlight
• Integrated Taillight
• LCD Display
• Fenders
• Throttle
• Kickstand
• Rear Rack
• Pedal Assist
• Full Suspension
• Buy at Magnum

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Causes of Common Problems with the Magnum Cosmo

In this section, we’ll explore the common problems that owners of the Magnum Cosmo may encounter and discuss their potential causes.

Stay tuned as we delve into troubleshooting solutions to address these issues effectively.

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1. Battery Draining Quickly – Magnum Cosmo

• Description of the Problem: Owners of the Magnum Cosmo may notice that the battery drains more quickly than expected, leading to reduced range per charge.
• Cause of the Problem: One possible cause could be excessive power consumption due to high-speed riding, frequent use of throttle, or riding on challenging terrain.
• Troubleshooting Step-by-Step:
  1. Check riding habits: Avoid excessive throttle use and maintain a moderate speed to conserve battery.
  2. Inspect terrain: Reduce strain on the battery by avoiding steep hills and rough terrain whenever possible.
  3. Monitor tire pressure: Ensure tires are properly inflated as under-inflated tires can increase rolling resistance and drain the battery faster.
  4. Update firmware: Check for any available firmware updates for the bike’s electronics and apply them if necessary.

2. Motor Overheating – Magnum Cosmo

• Description of the Problem: Some Magnum Cosmo owners may experience motor overheating, leading to reduced performance or even motor failure.
• Cause of the Problem: Overloading the motor by carrying excessively heavy loads, prolonged use on steep inclines, or riding at high speeds for an extended period can cause overheating.
• Troubleshooting Step-by-Step:
  1. Reduce load: Avoid carrying loads beyond the recommended weight limit specified for the bike.
  2. Avoid prolonged high-speed riding: Allow the motor to cool down periodically by reducing speed during long rides.
  3. Check for obstructions: Ensure that the motor and surrounding components are free from debris or anything that may obstruct airflow and contribute to overheating.
  4. Inspect motor connections: Ensure that all electrical connections to the motor are secure and free from corrosion.

3. Display Malfunction – Magnum Cosmo

• Description of the Problem: Some users may encounter issues with the LCD display on the Magnum Cosmo, such as flickering, blank screen, or incorrect information display.
• Cause of the Problem: Display malfunctions may occur due to loose connections, water damage, or software glitches.
• Troubleshooting Step-by-Step:
  1. Check connections: Ensure that all connections between the display unit and the bike’s electronics are secure and free from damage.
  2. Inspect for water damage: If the bike has been exposed to water, allow it to dry thoroughly before attempting to use it again.
  3. Reboot the display: Try resetting the display unit by turning the bike off and on again.
  4. Update firmware: Check for any available firmware updates for the display unit and apply them if necessary.

4. Brake Squeaking – Magnum Cosmo

• Description of the Problem: Magnum Cosmo owners may encounter brake squeaking or grinding noises when braking, affecting the overall riding experience.
• Cause of the Problem: Brake squeaking can occur due to brake pad contamination, misalignment, or worn-out brake pads.
• Troubleshooting Step-by-Step:
  1. Inspect brake pads: Check the condition of the brake pads for wear and tear. Replace them if they appear worn out.
  2. Clean brake surfaces: Remove any dirt or debris from the brake pads and rotor surfaces to prevent squeaking.
  3. Adjust brake alignment: Ensure that the brake calipers are properly aligned with the rotor to prevent rubbing and noise.
  4. Bed-in new brake pads: If new brake pads are installed, follow the manufacturer’s instructions for bedding them in properly.

5. Loose Bolts and Fasteners – Magnum Cosmo

• Description of the Problem: Some Magnum Cosmo owners may encounter issues with loose bolts and fasteners, which can lead to rattling noises or compromised safety.
• Cause of the Problem: Vibrations during riding can cause bolts and fasteners to loosen over time, especially if they were not properly tightened during assembly.
• Troubleshooting Step-by-Step:
  1. Inspect all bolts and fasteners: Check all critical components such as handlebars, stem, seatpost, and rack for any signs of looseness.
  2. Tighten as necessary: Use the appropriate tools to tighten any loose bolts or fasteners to the manufacturer’s recommended torque specifications.
  3. Apply thread locker: Consider applying thread locker to critical bolts and fasteners to prevent them from loosening over time.
  4. Regular maintenance: Incorporate regular checks for loose bolts and fasteners as part of routine bike maintenance to ensure safe riding.

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  1. Battery Not Holding Charge – Magnum Cosmo

  Description of the Problem: The battery of the Magnum Cosmo electric bike may fail to hold a charge, resulting in shortened ride durations.

  Cause of the Problem: This issue can occur due to regular wear and tear of the battery, improper charging habits, or a faulty battery.

  Troubleshooting Step-by-Step:

  • Ensure the battery is properly connected and seated in place.
  • Check the charger and charging port for any damage or debris.
  • Try charging the battery using a different power outlet or charger to rule out charging issues.
  • If the problem persists, consider replacing the battery or seek professional assistance.

  2. Motor Overheating – Magnum Cosmo

  Description of the Problem: The motor of the Magnum Cosmo electric bike may overheat during extended or strenuous rides.

  Cause of the Problem: Overheating can occur due to excessive load on the motor, prolonged use of throttle at high speeds, or riding in hot weather conditions.

  Troubleshooting Step-by-Step:

  • Allow the motor to cool down by stopping the bike and letting it rest for a while.
  • Avoid overloading the bike with heavy cargo or riding at maximum throttle for extended periods.
  • Ensure proper ventilation by avoiding riding in extreme heat or direct sunlight.
  • If overheating persists, consult a technician to inspect and potentially repair the motor.

  3. Brake Alignment Issues – Magnum Cosmo

  Description of the Problem: The brakes of the Magnum Cosmo electric bike may experience alignment issues, leading to reduced braking efficiency or noisy operation.

  Cause of the Problem: Brake misalignment can occur due to regular use, improper adjustments, or wear and tear of brake components.

  Troubleshooting Step-by-Step:

  • Inspect the brake pads and discs for any signs of wear or damage.
  • Adjust the brake calipers to ensure proper alignment with the brake discs.
  • Clean and lubricate the brake components to improve performance and reduce noise.
  • If alignment issues persist, consider replacing worn brake pads or seek professional assistance.

  4. Display Malfunction – Magnum Cosmo

  Description of the Problem: The LCD display of the Magnum Cosmo electric bike may malfunction, displaying incorrect information or failing to turn on.

  Cause of the Problem: Display issues can occur due to electrical faults, loose connections, or water damage.

  Troubleshooting Step-by-Step:

  • Check the display connections to ensure they are securely plugged in.
  • Inspect the display for any signs of physical damage or water ingress.
  • Reset the display unit by turning off the bike and disconnecting the battery for a few minutes.
  • If the problem persists, consider replacing the display unit or seek professional repair.

  5. Sudden Power Loss – Magnum Cosmo

  Description of the Problem: The Magnum Cosmo electric bike may experience sudden power loss while riding, resulting in a loss of motor assistance.

  Cause of the Problem: Power loss can occur due to electrical issues, battery depletion, or motor controller malfunctions.

  Troubleshooting Step-by-Step:

  • Check the battery charge level and ensure it is adequately charged.
  • Inspect the electrical connections for any signs of damage or loose wires.
  • Reset the bike’s electrical system by turning it off and on again.
  • If power loss persists, consult a technician to diagnose and repair the underlying issue.

  
  
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  1. Battery Draining Quickly

  Description: One common issue with the Magnum Cosmo electric bike is that the battery drains quickly, resulting in reduced ride time.

  Cause of the Problem: This could be due to several factors, such as excessive use of throttle mode, riding in hilly terrain, or battery degradation over time.

  Troubleshooting Step-by-Step:

  • Check the battery charge level before each ride and recharge if necessary.
  • Avoid using throttle mode excessively, as it can drain the battery more quickly.
  • Consider the terrain you’re riding on and adjust your riding mode accordingly to conserve battery.
  • If the battery continues to drain quickly, it may be time to replace it or have it serviced by a professional.

  2. Motor Not Engaging

  Description: Some Magnum Cosmo owners may experience issues where the motor does not engage when attempting to ride.

  Cause of the Problem: This could be caused by a faulty connection between the motor and the battery, a malfunctioning motor controller, or a problem with the pedal assist sensor.

  Troubleshooting Step-by-Step:

  • Check all electrical connections to ensure they are secure and free from corrosion.
  • Test the motor by connecting it directly to the battery to see if it engages.
  • Inspect the motor controller for any signs of damage or malfunction and replace if necessary.
  • If the pedal assist sensor is suspected to be the issue, adjust or replace it according to manufacturer guidelines.

  3. Brakes Squeaking or Grinding

  Description: Another common issue reported by Magnum Cosmo riders is brakes squeaking or grinding during braking.

  Cause of the Problem: This can occur due to brake pad wear, debris buildup on the brake rotors, or misalignment of the brake calipers.

  Troubleshooting Step-by-Step:

  • Inspect the brake pads for wear and replace them if they are worn down.
  • Clean the brake rotors with a mild solvent to remove any debris or contaminants.
  • Check the alignment of the brake calipers and adjust them if necessary to ensure even contact with the brake rotors.
  • If the issue persists, it may be necessary to replace the brake rotors or seek professional assistance.

  4. Display Malfunction

  Description: Some users may encounter problems with the display on their Magnum Cosmo electric bike, such as flickering, freezing, or not turning on at all.

  Cause of the Problem: This could be caused by a loose connection between the display and the main electrical system, water damage, or a malfunctioning display unit.

  Troubleshooting Step-by-Step:

  • Check the connections between the display and the main electrical system to ensure they are secure.
  • Inspect the display for any signs of water damage and dry it thoroughly if necessary.
  • Reset the display unit according to manufacturer instructions to see if the issue resolves.
  • If the problem persists, consider replacing the display unit or seek professional assistance.

  5. Chain Slippage

  Description: Some Magnum Cosmo riders may experience issues with the chain slipping or skipping gears during rides, leading to a disrupted riding experience.

  Cause of the Problem: Chain slippage can occur due to improper chain tension, worn chain or cassette, or misalignment of the drivetrain components.

  Troubleshooting Step-by-Step:

  • Check the chain tension and adjust it according to manufacturer guidelines if it is too loose or too tight.
  • Inspect the chain and cassette for signs of wear, such as stretched links or worn teeth, and replace them if necessary.
  • Ensure that the derailleur and other drivetrain components are properly aligned and adjusted to prevent chain slippage.
  • If the issue persists, consider upgrading to a higher quality chain or seek professional assistance.

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  6. Loose or Unresponsive Handlebars

  Description: Some Magnum Cosmo owners may encounter issues with loose or unresponsive handlebars, affecting steering control and stability during rides.

  Cause of the Problem: This could be due to loose headset bearings, improperly tightened stem bolts, or worn handlebar grips.

  Troubleshooting Step-by-Step:

  • Check the headset bearings and tighten them if they are loose or worn.
  • Inspect the stem bolts and ensure they are properly tightened to secure the handlebars in place.
  • If the handlebar grips are worn or slippery, consider replacing them with new ones for better grip and control.
  • If the issue persists, it may be necessary to seek professional assistance to diagnose and fix the problem.

  7. Unstable or Wobbly Ride

  Description: Some riders may experience instability or wobbling while riding the Magnum Cosmo, affecting ride comfort and safety.

  Cause of the Problem: This can occur due to improperly inflated tires, misaligned wheels, or loose spokes.

  Troubleshooting Step-by-Step:

  • Check the tire pressure and inflate them to the recommended PSI as specified by the manufacturer.
  • Inspect the wheels for any signs of misalignment and adjust them accordingly to ensure they spin freely without wobbling.
  • Tighten any loose spokes and ensure they are evenly tensioned to prevent wheel wobble.
  • If the issue persists, it may be necessary to have the wheels trued or seek professional assistance.

  8. Electrical Wiring Issues

  Description: Electrical wiring issues, such as exposed wires or faulty connections, can occur in Magnum Cosmo electric bikes, leading to electrical failures or malfunctions.

  Cause of the Problem: This can be caused by wear and tear, improper installation, or damage from external factors such as water or debris.

  Troubleshooting Step-by-Step:

  • Inspect all electrical wiring for any signs of damage, such as frayed or exposed wires, and repair or replace them as needed.
  • Ensure all electrical connections are properly seated and secured to prevent intermittent electrical issues.
  • Protect exposed wiring with insulation or cable sleeves to prevent damage from environmental factors.
  • If the problem persists, it may be necessary to consult a professional electrician or bike technician for further diagnosis and repair.

  9. Sudden Loss of Power

  Description: Some Magnum Cosmo riders may experience sudden loss of power while riding, resulting in a complete stop or reduced performance.

  Cause of the Problem: This could be due to a variety of factors, including battery depletion, motor malfunction, or electrical system failure.

  Troubleshooting Step-by-Step:

  • Check the battery charge level and recharge if necessary to ensure sufficient power for the ride.
  • Inspect the motor for any signs of damage or malfunction, such as overheating or unusual noises, and address any issues accordingly.
  • Test the electrical system components, including the controller and wiring, for proper functioning and repair or replace any faulty parts.
  • If the problem persists, it may be necessary to consult with a professional technician to diagnose and fix the underlying issue.

  10. Suspension Problems

  Description: Some Magnum Cosmo models may experience suspension problems, such as excessive bouncing or stiffness, impacting ride comfort and handling.

  Cause of the Problem: This can occur due to worn suspension components, improper adjustment, or lack of maintenance.

  Troubleshooting Step-by-Step:

  • Inspect the suspension fork and rear shock for any signs of damage or wear, such as leaking oil or worn seals, and replace them if necessary.
  • Adjust the suspension settings according to rider weight and riding preferences to achieve optimal performance and comfort.
  • Regularly clean and lubricate suspension components to prevent dirt and debris buildup that can affect suspension performance.
  • If the issue persists, it may be necessary to have the suspension system serviced or upgraded by a professional bike mechanic.

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  11. Loose Pedals

  Description: Some Magnum Cosmo riders may encounter issues with loose pedals, leading to discomfort and potential safety hazards during rides.

  Cause of the Problem: Loose pedals can occur due to improper installation, worn pedal threads, or inadequate pedal maintenance.

  Troubleshooting Step-by-Step:

  • Check the pedal threads for any signs of wear or damage and replace the pedals if necessary.
  • Ensure the pedals are securely tightened onto the crank arms using a pedal wrench or spanner.
  • Apply a small amount of grease or threadlocker to the pedal threads before installation to prevent loosening over time.
  • If the problem persists, consider upgrading to pedals with a more secure attachment mechanism or seek professional assistance.

  12. Gear Shifting Issues

  Description: Some Magnum Cosmo riders may experience difficulties with gear shifting, such as skipping gears, chain slipping, or hesitation during gear changes.

  Cause of the Problem: Gear shifting issues can be caused by misadjusted derailleurs, worn drivetrain components, or cable tension problems.

  Troubleshooting Step-by-Step:

  • Inspect the derailleurs for proper alignment and adjustment, ensuring they move smoothly and accurately between gears.
  • Check the condition of the chain and cassette for signs of wear or damage, and replace them if necessary.
  • Adjust the cable tension using barrel adjusters on the shifters or derailleurs to achieve crisp and reliable gear shifts.
  • If the problem persists, it may be necessary to replace worn drivetrain components or seek professional assistance for diagnosis and repair.

  13. Wheel Misalignment

  Description: Wheel misalignment can occur in Magnum Cosmo electric bikes, leading to uneven tire wear, handling problems, and increased risk of accidents.

  Cause of the Problem: This can be caused by improper wheel installation, loose axle nuts, or frame misalignment.

  Troubleshooting Step-by-Step:

  • Check the alignment of the wheels using a straightedge or alignment gauge, ensuring they are centered within the frame and fork.
  • Inspect the axle nuts or quick-release skewers to ensure they are properly tightened and secure.
  • If necessary, loosen the axle nuts or skewers and realign the wheels within the frame before retightening them to the manufacturer’s specifications.
  • If the problem persists, it may be necessary to have the frame inspected for misalignment by a professional bike mechanic.

  14. Noisy Chain

  Description: Some Magnum Cosmo riders may experience a noisy chain during rides, characterized by rattling, grinding, or squeaking sounds.

  Cause of the Problem: A noisy chain can be caused by improper lubrication, worn chainrings or cassette, or misalignment of the drivetrain components.

  Troubleshooting Step-by-Step:

  • Clean the chain thoroughly with a degreaser to remove any dirt, debris, or old lubricant buildup.
  • Apply a high-quality bicycle chain lubricant to the chain, ensuring it penetrates between the links for smooth and quiet operation.
  • Inspect the chainrings and cassette for signs of wear or damage, such as hooked or worn teeth, and replace them if necessary.
  • Check the chain tension and adjust it if necessary to ensure proper engagement with the drivetrain components.

  15. Unresponsive Throttle

  Description: Some Magnum Cosmo models may experience issues with an unresponsive throttle, where applying throttle input does not result in motor engagement.

  Cause of the Problem: This could be due to a faulty throttle sensor, loose electrical connections, or a malfunctioning motor controller.

  Troubleshooting Step-by-Step:

  • Check the throttle sensor for proper operation by testing it with a multimeter or diagnostic tool.
  • Inspect all electrical connections between the throttle, motor controller, and battery to ensure they are secure and free from corrosion.
  • If the throttle sensor is found to be faulty, replace it with a new one according to manufacturer specifications.
  • If the issue persists, it may be necessary to diagnose and replace any malfunctioning components, such as the motor controller or throttle assembly.

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  Magnum Cosmo electric bike User Reviews

  Positive Reviews from Magnum Cosmo Users

  Here are some positive experiences shared by Magnum Cosmo users:

  • Smooth and Powerful Ride: Some users were satisfied with the smooth and powerful ride offered by the Magnum Cosmo, thanks to its 750W output and pedal assist functionality. They appreciated how effortlessly the bike handled hills and rough terrain, providing a comfortable and enjoyable riding experience.
  • Stylish Design: Many users praised the sleek and minimalistic design of the Magnum Cosmo, highlighting its modern aesthetic and eye-catching appearance. They found the bike to be a stylish and trendy choice for urban commuting and leisurely rides.
  • Convenient Low-Step Frame: Riders appreciated the low-step geometry of the Magnum Cosmo, which made it easy to mount and dismount the bike, especially for those with mobility issues or limited flexibility. They found this feature to be incredibly convenient and user-friendly.
  • Long Battery Range: Several users were impressed with the Magnum Cosmo’s long battery range of up to 40 miles on a single charge. They found this extended range to be practical and convenient for longer rides without the need for frequent recharging.
  • Responsive Throttle: Users enjoyed the responsive throttle option on the Magnum Cosmo, which provided an extra boost of power when needed, especially during acceleration or when navigating through traffic. They found this feature to be useful for maintaining speed and control in various riding conditions.

  In conclusion, positive feedback from Magnum Cosmo customers indicates satisfaction with its smooth ride, stylish design, convenient low-step frame, long battery range, and responsive throttle. These features contribute to an overall positive riding experience for users, making the Magnum Cosmo a popular choice among electric bike enthusiasts.

  
  
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  Negative user reviews of the Magnum Cosmo

  Here are some summarized negative user reviews of the Magnum Cosmo:

  • Limited Off-road Capabilities: Some users were not satisfied with the limited off-road capabilities of the Magnum Cosmo. They found that the bike was not suitable for rough terrain or trail riding, lacking the necessary features and suspension for off-road adventures.
  • Minimalist Design: Some users expressed dissatisfaction with the minimalist design of the Magnum Cosmo. They felt that the bike was too simplistic and lacked additional features that could enhance their riding experience. These users desired a more complex design with added functionalities such as integrated lights, advanced display systems, or suspension upgrades.

  Findings: Negative feedback from Magnum Cosmo customers primarily revolves around concerns regarding its off-road capabilities and minimalist design. While some users desire more features and versatility for adventurous riding, others find the minimalist approach lacking in certain aspects.

  Conclusion: Despite some negative feedback, the majority of users were satisfied with their experience with the Magnum Cosmo. While it may not meet the needs of all riders, it still offers a reliable and enjoyable riding experience for many.

  
  
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  Magnum Cosmo Manual

  The operating instructions for the Magnum Cosmo can be found on the manufacturer’s website.

  Conclusion

  Overall Impressions: The Magnum Cosmo electric bike offers a compelling blend of style, performance, and affordability, making it a popular choice among riders seeking an accessible and enjoyable e-biking experience.

  Positive Aspects: Throughout this article, we’ve highlighted the many positive features and benefits of the Magnum Cosmo, including its sleek design, powerful motor, long battery range, and user-friendly features like pedal assist and throttle control.

  Customer Feedback: While there are some concerns raised by users regarding off-road capabilities and the minimalist design, the majority of feedback indicates satisfaction with the bike’s performance and value for money.

  Recommendation: Despite some limitations, the Magnum Cosmo remains a solid choice for commuters and recreational riders alike, offering a reliable and enjoyable riding experience. For those interested in purchasing or learning more about the Magnum Cosmo, we recommend visiting the manufacturer’s website for detailed specifications and operating instructions.

  
  
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  Magnum Cosmo FAQ

  What power system does the Magnum Cosmo eBike use?

  The Magnum Cosmo utilizes a 48 Volt power system with a 500 Watt motor.

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  How far can I travel on a single charge with the Magnum Cosmo?

  The Magnum Cosmo offers a maximum range of 40 miles per charge.

  What is the battery capacity of the Magnum Cosmo?

  The Magnum Cosmo is equipped with a 10Ah battery.

  What are the reasons I might not want to buy the Magnum Cosmo?

  You might not want to buy the Magnum Cosmo if you are looking for an eBike with a more complex design and additional features, or if you require a bike with off-road capabilities.

  What is the top speed of the Magnum Cosmo?

  The top speed of the Magnum Cosmo is 25 MPH.

  What are some of the features of the Magnum Cosmo?

  The Magnum Cosmo comes with a headlight, integrated taillight, LCD Display, fenders, throttle, kickstand, rear rack, pedal assist, and it is noted for its minimalistic design.

  What type of frame does the Magnum Cosmo have?

  The Magnum Cosmo has a low-step aluminum frame that’s easy to mount and dismount.

  Does the Magnum Cosmo have a throttle and pedal assist?

  Yes, the Magnum Cosmo features both a throttle and pedal assist.

  What are the wheel dimensions of the Magnum Cosmo?

  The Magnum Cosmo has 26-inch wheels with a width of 3 inches.

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