Vivi Electric Bike, 20" 500W Folding Electric Bike, 19.8MPH Adult Electric Bicycles with…
- Electric Bicycle
- 20 inches
- 330 pounds
- 374 Wh
- More reviewed than 72%
A well-equipped folding ebike with genuine range and useful extras like cruise control, but assembly quality and manual clarity are inconsistent enough to budget extra time or a shop visit.
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How it ranks among the 478 electric bicycles we track
4.2★ across 51 Amazon ratings, Bayesian-smoothed toward the category average.
51 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 478 electric bicycles we track - how the scorecard works · full electric bicycles data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 21, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 20 inch folding electric bike with a 500W motor (750W peak), a removable 48V 374.4Wh battery rated for 22 to 50 miles depending on mode, cruise control, dual disc brakes and IPX7 certification to UL2849.
The bike ships about 85 percent assembled, and reviewer experiences with the remaining assembly split sharply, some found it straightforward and others called the printed manual confusing enough to need real bike repair experience. Most owners who stuck with it after setup reported strong battery life and an easy fold for storage in a closet or car trunk. A minority ran into hardware failures, including a kickstand that snapped at the weld and a stripped pedal arm, with after-sale support quality varying by report.
- 500W motor, 750W peak output
- Removable 48V 374.4Wh battery
- Up to 50 miles range in assist mode
- Cruise control and dual disc brakes
Who it's for
Fits a rider who wants a folding commuter ebike with real battery range and is comfortable doing final assembly from a manual, or has a bike shop finish it. Not a good match for someone who wants a bike ready to ride straight out of the box with zero setup.
What buyers say
From Amazon customer reviews.
Reviewers consistently praised the battery range, the graduated power assist levels and how easily the bike folds for storage, with one owner calling out the added brake light and fenders as thoughtful touches. The most common complaint was a confusing printed assembly manual, and a smaller number of buyers reported hardware failures, including a kickstand that broke off at the weld and, in one case, a stripped pedal arm and a battery that stopped charging with slow-moving after-sale support.
Strengths and trade-offs
Drawn from this product's published specifications.
- Genuine battery range across charge modes
- Folds down for closet or trunk storage
- Cruise control holds speed hands-free
- Assembly manual described as confusing
- Some hardware failures reported, kickstand and pedal arm
Performance notes
The 500W motor with a 750W peak and the 374.4Wh removable battery are rated for 22 to 25 miles in throttle mode and up to 44 to 50 miles with pedal assist, and reviewers who tracked their rides said the battery lasted through extended use. Cruise control lets the bike hold a set speed without pedaling or holding the throttle, and dual disc brakes are paired with a 7-speed drivetrain, though one rider could not get the top two gears to engage.
Specifications
| Brand | Vivi |
|---|---|
| Model | AMAK00018 |
| Dimensions & fit | |
| Wheel Size | 20 inches |
| Maximum Weight Recommendation | 330 pounds |
| Item Weight | 53.13 pounds |
| Size | 20 inches |
| Capacity & performance | |
| Bicycle Gear Shifter Type | Trigger |
| Bicycle Drivetrain Type | Derailleur |
| Number Of Speeds | 7 |
| Age Range Description | Adult |
| Power & efficiency | |
| Lithium Battery Energy Content | 374 Wh |
| Wattage | 500 watts |
| Power Source | Battery |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Color | White |
| Included components | |
| Included Components | Bell, Kickstand, Mudguard |
| Warranty & support | |
| Warranty Type | Limited |
| Warranty Description | 1 year |
| Other details | |
| Bike Type | Electric Bike, Folding Bike, City Bike, Commuting Bike, Cruiser Bike |
| Suspension Type | Dual |
| Electric Assist Type | Pedelec |
| Is Assembly Required | Yes |
| Model Year | 2020 |
| Additional Features | Foldable, Lightweight |
| Brake Style | Disc |
| Specific Uses For Product | Trail |
| Style Name | Modern Minimalist |
| Derailleur Configuration | Rear |
| Theme | Electric Bike, Folding Bike |
Other Vivi electric bicycles
How it compares
This product against the closest alternatives we track in electric bicycles.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Vivi Electric Bike, 20" 500W Folding Electric Bike, 19.8MPH Adult Electric Bicycles with…This product | 4.2 / 5 | 51 | 3.7 / 5 |
| Wooken Electric Bike for Adults with 500W MotorWooken | 4.4 / 5 | 312 | 4.1 / 5 |
| TotGuard Electric BikeTotGuard | 4.4 / 5 | 286 | 4.1 / 5 |
| ANCHEER 14" Folding Electric Bike for TeensAncheer | 4.2 / 5 | 329 | 4.0 / 5 |
| Gotrax 16" Folding Electric BikeBrand | 4.4 / 5 | 555 | 4.0 / 5 |
Similar electric bicycles from other brands
Questions about the Vivi AMAK00018
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Vivi ebike come fully assembled?
No, it arrives about 85 percent assembled and needs final assembly, which several reviewers found harder than expected due to the printed manual.
How far can it go on one charge?
Reviewers and the spec sheet both point to roughly 22 to 25 miles on throttle alone and up to 44 to 50 miles using pedal assist.
Is the bike easy to fold and store?
Yes, multiple reviewers, including one in their late 60s, said it folds easily enough to store in a small closet or lift into a car trunk.