Tested vs claimed range
Claimed50 mi
Tested37 mi
Manufacturer overclaim: 26%MathBikes tested figure under mixed conditions
Full specifications
| Brand | VIVI |
|---|---|
| Model | FM20UL |
| Type | Folding |
| Battery | 374 Wh |
| Motor torque | 40 Nm Hub motor |
| Weight | 50 lb |
| Claimed range | 50 mi |
| Tested range | 37 mi −26% vs claim |
| Price | $530 |
| Features | ✓ Foldable× Throttle× Step-through× Cargo× Fast (45 km/h) |
| Use cases | Commuting |
| Available in | USA |
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We've pre-filled each tool with this bike's spec. Adjust your own usage - terrain, weight, weekly km - to see the numbers for you, not the marketing brochure.
01 - Range
Real-world range
How far will it actually go with your weight, terrain & assist?
Pre-filled 374 Wh03 - TCO
Cost of ownership
Add a rival and compare over 5 years - charging, service, resale.
Pre-loaded as Bike A04 - Battery
Battery economics
When you'll need a replacement, and what each km really costs.
Pre-filled 374 WhSimilar bikes
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