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You are looking for the best NB Power electric bikes to upgrade your current ride. NB Power offers rear wheel conversion kits in various sizes, including 19-inch, 20-inch, 26-inch, and 27.5-inch options. These kits feature motor powers ranging from 2000W to 5000W and voltages up to 72V. We compared 7 models based on their published specifications. The NB Power 135mm 3000W Conversion Kit leads because it delivers high speed and voltage flexibility for narrow frames.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | NB Power 135mm 3000W Conversion Kit Best overall | High-speed upgrades for narrow 135mm frames | |
| 2 | NB Power 72V 2000W Rear Wheel Kit Best budget | Standard 135mm dropout frames | |
| 3 | NB Power 72V 5000W Rear Wheel Kit Best premium | fat bike owners needing high power | |
| 4 | NB Power 2000W 52V Rear Wheel Conversion Kit Best 52v | Standard 26-inch frames needing 52V power | |
| 5 | NB Power 20×4.0 5000W Fat Tire Kit Best fat tire | High-speed 20-inch fat tire conversions | |
| 6 | NB Power 3000W Conversion Kit Also great | high-speed conversions with flexible voltage | |
| 7 | NB Power 26in 3000W Conversion Kit Also great | Standard frames needing reliable mid-range power |
NB Power E-Bike Kits Compared
NB Power kits vary by voltage and wheel size. The 135mm 3000W Conversion Kit suits narrow frames needing high speed. The 72V 2000W Rear Wheel Kit fits standard 135mm dropouts for mid-range power. The 20×4.0 5000W Fat Tire Kit delivers serious performance for wide-tire builds.
Other options include the 72V 5000W Rear Wheel Kit for fat bikes and the 2000W 52V Rear Wheel Conversion Kit for stable voltage. The 26in 3000W Conversion Kit offers reliable power for standard frames. Choose based on your frame width and desired speed.
NB Power 135mm 3000W Conversion Kit
Best for: High-speed upgrades for narrow 135mm frames
- Motor Power
- 3000W
- System Voltage
- 48V-72V
- Top Speed
- 100km/h
This NB Power conversion kit features a 3000W rear hub motor with a sine wave controller. It supports system voltages from 48V to 72V and reaches speeds up to 100km/h. The kit includes a TFT color display and a 19-inch motor rim. It is designed for bikes with 135mm rear dropouts. You should use this if you need high speed and a robust power upgrade for your existing frame.
- 3000W motor power for strong acceleration
- TFT UKC1 color display for clear data
- Supports 48V to 72V system voltage
- Sine wave controller reduces heat and noise
- 135mm dropout width limits compatibility with wider frames
- 19-inch rim size is smaller than standard 26 or 29-inch wheels
- Single speed freewheel offers limited gear options
- You have a bike with 135mm rear dropouts
- You want a top speed near 100km/h
- You prefer a sine wave controller for smooth power
- Your bike frame requires 150mm or 175mm dropouts
- You need a multi-speed geared hub motor
- You require a larger 26-inch or 29-inch wheel size
Verdict: NB Power 3000W 135mm Dropouts E-Bike Kit delivers high speed and voltage flexibility for riders with narrow rear frames. It fits those who prioritize raw power and clear display data over wide tire clearance or multiple gear speeds.
NB Power 72V 2000W Rear Wheel Kit
Best for: Standard 135mm dropout frames
- Motor Power
- 2000W
- System Voltage
- 72V
This NB Power conversion kit features a 72V 2000W rear hub motor designed for 135mm dropouts. It includes a 45A sine wave controller and a multifunction SW900 display. The wheel uses Sun Ringle MTX33/39 double-wall alloy rims. You can choose from several rim sizes, including 26, 27.5, 28, 29, and 20 inch options. It suits riders seeking a mid-range power upgrade for standard mountain bike frames.
- 72V 2000W rear hub motor
- 45A sine wave controller
- Multifunction SW900 display
- Sun Ringle MTX33/39 alloy rims
- Multiple wheel size options
- 2000W motor power is lower than the 3000W and 5000W options on this list
- 72V system is less common than 48V or 52V setups
- Rear dropout width is limited to 135mm
- You need a 72V 2000W motor for a 135mm dropout frame
- You want a reliable sine wave controller with a clear display
- You prefer alloy rims for durability
- You require more than 2000W of power
- Your bike frame has 150mm or 155mm dropouts
- You prefer a 48V or 52V electrical system
Verdict: NB Power 72V 2000W Rear Wheel Kit provides solid mid-range power for standard frames. It fits riders who need a 72V system but do not require the highest wattage available.
NB Power 72V 5000W Rear Wheel Kit
Best for: fat bike owners needing high power
- Motor Power
- 5000W
- System Voltage
- 72V
- Brake Type
- disc brake
This NB Power kit features a 5000W motor and 72V system for high performance. It includes a programmable TFT color display and a waterproof 100A controller. The 20-inch wheel size with 150-155mm dropouts suits fat bike frames. You get disc brake compatibility and sine wave control. This setup is ideal for riders seeking maximum power in a compact wheel format.
- 5000W motor output for strong acceleration
- 72V system voltage for high speed potential
- Programmable TFT color display with speed control
- Waterproof 100A sine wave controller
- Disc brake compatible MTX rim
- 20-inch wheel size is smaller than standard 26-inch or 29-inch options
- 150-155mm dropout width limits frame compatibility to specific fat bikes
- 5000W power may be excessive for casual commuting
- You own a fat bike with 20-inch wheels
- You need a 150-155mm rear dropout width
- You want a high-power 72V conversion kit
- You require a standard 135mm or 150mm non-fat bike frame
- You prefer smaller 26-inch or 29-inch wheel sizes
- You need a kit under 5000W for lower speed
Verdict: NB Power 20in 5000W 72V Rear Wheel is a powerful option for fat bike owners. It fits riders who need high torque and have the specific frame width for a 20-inch wheel.
NB Power 2000W 52V Rear Wheel Conversion Kit
Best for: Standard 26-inch frames needing 52V power
- Motor Power
- 2000W
- System Voltage
- 52V
- Top Speed
- about 60-65km/hour
- Wheel Size
- 26 Inch
- Dimensions
- 100 × 100 × 50 centimeters
- Weight
- 24.3 pounds
This NB Power conversion kit features a 52V system with a 2000W rear motor. It delivers a top speed of about 60-65 km/h. The 26-inch wheel size fits standard frames with 135mm dropouts. A color KT LCD8H display and sine wave controller are included. This setup suits riders seeking moderate power and reliable speed for daily commuting or light trail use.
- 52V system voltage for efficient power delivery
- 2000W rear motor provides strong acceleration
- Includes color KT LCD8H display for monitoring
- Sine wave controller with cruise control function
- 2000W motor power is lower than 3000W or 5000W options on this list
- 26-inch wheel size limits compatibility with 20-inch or 29-inch frames
- Top speed of 65 km/h is slower than 90 km/h models available
- You need a 52V system for better efficiency
- Your bike frame has 135mm rear dropouts
- You prefer a 26-inch wheel size
- You require more than 2000W of power
- Your frame uses 150mm or wider dropouts
- You want a top speed over 65 km/h
Verdict: NB Power 26-Inch 52V 2000W Kit offers a balanced power-to-weight ratio for standard frames. It is a solid choice for riders who prioritize voltage stability over raw speed.
NB Power 20×4.0 5000W Fat Tire Kit
Best for: High-speed 20-inch fat tire conversions
- Motor Power
- 5000W
- System Voltage
- 36V-72V
- Top Speed
- 100KM/H
- Tire Size
- 20 * 4.0
- Bike Type
- Fat Tire
- Weight
- 33.1 pounds
This NB Power conversion kit transforms your bike into a fat tire e-bike with a 20 by 4.0 inch rear wheel. It features a 5000W motor and a Sabvoton controller that supports system voltages from 36V to 72V. You get a top speed of 100 km/h and a 170 to 175mm dropout width. The package includes a TFT color display and waterproof cables. It suits riders seeking high power and wide tire compatibility.
- 5000W motor output for high performance
- Supports 36V to 72V system voltage
- Includes TFT color display
- 170-175mm dropout width fits many frames
- Heavier build at 33.1 pounds
- Limited to 20-inch tire size option
- You need a high-speed conversion kit
- You want a 20-inch fat tire setup
- You require a Sabvoton controller
- You prefer a lighter wheel assembly
- You need a 26-inch tire width
- You require a smaller dropout size
Verdict: NB Power 20×4.0 5000W Fat Tire Kit delivers serious speed and power for riders who prioritize performance over weight. It fits those building a fast, wide-tire e-bike with a 20-inch rear wheel.
NB Power 3000W Conversion Kit
Best for: high-speed conversions with flexible voltage
- Motor Power
- 3000W
- System Voltage
- 48V-72V
- Top Speed
- 90km/h
- Dimensions
- 15 × 15 × 27.5 inches
This NB Power conversion kit transforms your bicycle into an electric bike. It features a 3000W rear motor and supports system voltages from 48V to 72V. The included SW900 LCD display shows speed, battery, and assist levels. It fits dropouts measuring 150-155mm. You get a sine wave controller for smooth power delivery. This setup is ideal for riders seeking high speed and customizable voltage options for their existing frame.
- 3000W rear motor power
- Supports 48V to 72V systems
- SW900 LCD display with cruise control
- Fits 150-155mm dropouts
- Lower 3000W motor power compared to 5000W options on this list
- Fixed 27.5-inch wheel size for this specific variation
- Requires separate battery purchase for operation
- You want a high-speed electric bike conversion
- You have a frame with 150-155mm rear dropouts
- You prefer a sine wave controller for smooth acceleration
- You need a pre-assembled battery and motor unit
- Your bike frame uses 135mm or 175mm+ dropouts
- You require a 5000W motor for maximum torque
Verdict: NB Power 27.5in 3000W Conversion Kit delivers reliable high-speed performance for riders with compatible frames. It suits those who value voltage flexibility and detailed ride data over raw motor wattage.
NB Power 26in 3000W Conversion Kit
Best for: Standard frames needing reliable mid-range power
- Motor Power
- 3000W
- System Voltage
- 48/60/72V
- Wheel Size
- 26 Inch
This NB Power conversion kit transforms a standard bicycle into an electric bike. It features a 3000W brushless DC motor paired with a 48/60/72V sine wave controller. The 26-inch alloy wheel fits frames with 150-155mm dropouts. You get a twist throttle, LED voltage display, and programmable PAS. This setup offers solid power for urban commuting or light trails.
- 3000W brushless DC motor for strong acceleration
- Programmable 80A sine wave controller supports 48/60/72V systems
- Includes twist throttle with LED voltage display
- PAS and alarm features for added safety
- 3000W motor power is lower than the 5000W option on this list
- 26-inch wheel size is smaller than the 20-inch fat bike option
- Fixed 150-155mm dropout width limits frame compatibility
- You need a mid-range power conversion for daily commuting
- Your bike frame has 150-155mm rear dropouts
- You prefer a 26-inch wheel for standard terrain
- You require maximum speed with a 5000W motor
- Your frame uses a different dropout width
- You want a fat tire setup for off-road use
Verdict: NB Power 26" 3000W Rear Wheel Kit provides reliable power for riders who do not need extreme speed. It fits standard frames well and offers essential controls.
Specifications side by side
| Spec | NB Power 135mm 3000W Conversion Kit | NB Power 72V 2000W Rear Wheel Kit | NB Power 72V 5000W Rear Wheel Kit | NB Power 2000W 52V Rear Wheel Conversion Kit | NB Power 20×4.0 5000W Fat Tire Kit | NB Power 3000W Conversion Kit | NB Power 26in 3000W Conversion Kit |
|---|---|---|---|---|---|---|---|
| Motor Power | 3000W | 2000W | 5000W | 2000W | 5000W | 3000W | 3000W |
| System Voltage | 48V-72V | 72V | 72V | 52V | 36V-72V | 48V-72V | 48/60/72V |
| Top Speed | 100km/h | – | – | about 60-65km/hour | 100KM/H | 90km/h | – |
| Tire Size | – | – | – | – | 20 * 4.0 | – | – |
| Brake Type | – | – | disc brake | – | – | – | – |
| Bike Type | – | – | – | – | Fat Tire | – | – |
| Wheel Size | – | – | – | 26 Inch | – | – | 26 Inch |
| Voltage | 48V | 72V | 72V | 52V | – | 48V | 72V |
| Dimensions | – | – | – | 100 × 100 × 50 centimeters | – | 15 × 15 × 27.5 inches | – |
| Weight | – | – | – | 24.3 pounds | 33.1 pounds | – | – |
| Size | 19" | – | 20 inch | 26inch | 175mm | – | 26inch |
| Color | motor rim 19inch | 28inch Rear | 700C | 26inch | 20*4.0 Rear | Rear MTX39 27.5inch | 26inch Rear |
| Model | – | – | – | – | 13247eb2-4e4d-4dc3-b6a0-56f5e57b6fcb | – | – |
Who NB Power Suits
NB Power targets riders upgrading specific frame widths. You have options for narrow 135mm dropouts or wider fat bike setups. The range spans 19-inch to 27.5-inch wheels, with voltages from 48V to 72V. Most kits offer 2000W or 3000W, while fat tire models reach 5000W. You do not need extreme speed; the 2000W 72V kit provides balanced power. However, standard 26-inch frames with lower voltage options are limited. You also lack front wheel conversions or integrated battery packs in this lineup. Choose based on your dropout width and desired voltage stability.
If you require higher battery capacity, compare these options against the best electric bikes with 30Ah.
How to choose the right NB Power kit
Match wheel size to frame
Your bike frame determines which wheel size fits. NB Power offers 19-inch, 20-inch, 26-inch, and 27.5-inch options. A 26-inch kit, like the 2000W 52V model, suits standard frames. Fat bike owners need a 20-inch wheel, such as the 5000W fat tire kit. Ensure the new wheel matches your existing dropout width and tire clearance. Measuring your current rear spacing prevents installation issues. Select the size that aligns with your frame geometry for a secure fit.
Check motor power needs
Motor power ranges from 2000W to 5000W. Higher wattage delivers more speed and torque. A 5000W kit, like the fat tire option, suits heavy loads or steep hills. A 2000W model offers balanced performance for daily commuting. Consider your terrain and weight. More power means faster acceleration but may drain the battery quicker. Choose the wattage that matches your riding style without exceeding your frame limits.
Select compatible voltage
Voltage affects system efficiency and speed. NB Power kits use 48V, 52V, or 72V. Higher voltage systems, like 72V, provide better performance under load. Ensure your battery pack matches the kit voltage. A 48V kit, such as the 135mm 3000W model, offers flexibility for various setups. Mismatched voltage can damage components. Check your existing battery specifications before purchasing. Consistent voltage ensures reliable operation and protects your electrical system.
Verify dropout compatibility
Rear dropout width is critical for installation. Many NB Power kits fit standard 135mm dropouts. Some models, like the 135mm 3000W conversion kit, are designed for narrow frames. Others may require wider spacing for fat tires. Measure your frame dropouts accurately. Using a kit with incorrect spacing can cause safety issues. Verify the product specifications match your frame. Proper fitment ensures secure mounting and safe riding.
Consider weight and balance
Motor weight impacts bike handling. Heavier motors, like the 33.1-pound fat tire kit, add mass to the rear. This affects acceleration and braking. Lighter kits, around 24.3 pounds, offer easier handling. Consider how the added weight changes your ride dynamics. A balanced bike is easier to control. Check the weight specifications in the product data. Choose a kit that maintains your preferred riding feel.
Frequently asked questions
Which NB Power kit is best for a fat bike?
The NB Power 20×4.0 5000W Fat Tire Kit is the top choice for fat bike owners. It delivers high torque and serious speed for wide-tire conversions. This kit features a 5000W motor and weighs 33.1 pounds. It is designed specifically for riders prioritizing performance over weight in a 20-inch rear wheel setup.
What is the highest voltage option available?
NB Power offers kits with 72V systems for riders needing higher voltage stability. The 72V 2000W Rear Wheel Kit fits standard 135mm dropouts, while the 20-inch 5000W model targets fat bikes. Another 26-inch 3000W option also runs on 72V. These systems provide solid mid-range to high power for various frame types.
Can I use NB Power kits on narrow frames?
Yes, the NB Power 135mm 3000W Conversion Kit is built for narrow 135mm frames. It delivers high speed and voltage flexibility for riders who prioritize raw power. This kit includes a 19-inch motor rim and is ideal for those who do not require wide tire clearance or multiple gear speeds.
Which kit is best for standard 26-inch frames?
The NB Power 2000W 52V Rear Wheel Conversion Kit is a balanced choice for standard 26-inch frames. It offers a solid power-to-weight ratio for riders who prioritize voltage stability over raw speed. The kit weighs 24.3 pounds and fits standard 26-inch rear dropouts effectively.
What is the difference between the 3000W kits?
The 135mm 3000W kit targets narrow frames with a 19-inch rim and 48V system. The 27.5-inch 3000W kit suits compatible frames with a 48V system and detailed ride data. The 26-inch 3000W kit runs on 72V for standard frames. Each variant matches specific wheel sizes and voltage needs.
Is there a budget-friendly NB Power option?
The NB Power 72V 2000W Rear Wheel Kit is the best budget pick. It provides solid mid-range power for standard 135mm dropout frames. This kit is ideal for riders who need a 72V system but do not require the highest wattage available. It offers reliable performance for everyday upgrades.
How heavy are the NB Power conversion kits?
Kit weights vary by size and power. The 26-inch 2000W 52V kit weighs 24.3 pounds. The 20×4.0 5000W Fat Tire Kit is heavier at 33.1 pounds due to its wide tire and high-power motor. Other sizes like the 19-inch and 27.5-inch models do not list specific weights in the data.
