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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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For Your Every Summer RSVP, with Code: SUMMER15
Description
bike pedal assist kit Downtube Electric Assist Conversion Kit Promovec Electric Assist Systems – B1keparts.comHigh quality, Danish designed, rear hub motor electric assist conversion kit Wheel motor unit Promovec 50750 BL Brushless rear hub motor Nominal power: 500W Max Torque: 43Nm Voltage: 48V Maximum assist speed: 32 kmh 20 mph 5 assist levels HG cassette compatible Rim & Disc brake compatible 6 Bolt disc mount Hub spacing: 138mm Heavy Duty 12G stainless steel spokes Battery Promovec 50637 BL C Li Ion battery 48V 7. 8Ah Capacity: 374Wh Range: up to 79 km
- High quality, Danish designed, rear hub motor electric assist conversion kit
- Promovec 50750-BL Brushless rear hub motor
- Nominal power: 500W
- Max Torque: 43Nm
- Voltage: 48V
- Maximum assist speed: 32 kmh / 20 mph
- 5 assist levels
- HG cassette compatible
- Rim & Disc brake compatible
- 6-Bolt disc mount
- Hub spacing: 138mm
- Heavy Duty 12G stainless steel spokes
Battery
- Promovec 50637-BL-C Li-Ion battery
- 48V 7.8Ah
- Capacity: 374Wh
- Range: up to 79 km / 49 miles
- Universal fit rear rack
- Integrated controller & rear LED light
Interface
- Promovec 50986 LCD Center display
- 83.6 x 62.5mm backlit display
- IP65 protection
- CE / EN 15194 / REACH / ROHS certified
- Brackets for 22.2/25.4/31.8mm handlebar mounting incl.
- 5-buttons control panel
Sensor
- Speed sensors for regular square taper (JIS) bottom bracket or Hollowtech II type spindle crankset incl.
All hardware, cables and harness incl.
Wheel motor unit
Attributes
| Ah | 7.8Ah |
| Battery Type | Downtube |
| Console Color | Black |
| Motor | 500W |
| Motor Color | Black |
| Rim Color | Black |
| Voltage | 48V |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 630 reviews
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Product Reviews
★★★★★ 5
Real copper
Size: 16 AWG-100 ft
Good quality. Copper wire
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Quality all copper wire
Size: 16 AWG-100 ft
True16 Gauge pure copper wire
Quality wire with a high strand count
Nice insulation not overly stiff or too soft
Expect I will be buying more as it is a good value for the $
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 1, 2025
★★★★★ 5
Wire works as specified, no issues and good price
Size: 16 AWG-100 ft
Wire is as specified. Works great, no issues. Good price when I purchased. The wire insulation is not overly stiff and can handle manipulation well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 5, 2025
★★★★★ 4
Not the sorry copper coated aluminum.
Size: 16 AWG-100 ft
The wire is 16 gauge plenty big for my system. Heck, the wires supplied with my stereo, copomonet speakers, and amplifiers are about 20 or 24 gauge. I'm quite sure the wire will be more than suffeceint. I, m installing a mono sub amplifier a four-way amplifier to the sub amp outputs and the front of lines of the stereo. I'm gonna be pushing 20 speakers all except the sub woofer only pushing 100 watts a channel and the sub will push 150 watts. That makes 21 altogether. Not much just good clean sound. I've been working on the project going on 5 years now. Been bargain hunting, besides the work I've only got about $650 in the project. Can't wait to get it completed here around the end of July.
Hopefully, it will sound great didn't want to pay anyone. Seen too many "professional" jobs that were subpar. I've seen some nightmares. Figured if l did the job then who could I blame at least I can only blame myself and didn't pay $1,000 for it. 😁🤔
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Reviewed in the United States on June 30, 2021
★★★★★ 5
It's a good one, buy it.
Size: 16 AWG-100 ft
Actual 5 stars!
OFC, copper stranded wire, takes solder nicely when tinned, stiff and pliable enough to stay bent.
covering melts INTO wire as expected.
I was hoping for a good deal and got one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 15, 2025
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