Sundance BK1 review
Sundance BK1 review based on published specifications: 18650 lithium 36v 10ah battery, weight definitions, regional motor claims and practical ownership checks.
Product evidence checked 7 October 2026
Our assessment
The available BK1 listing specifies a 36V 10Ah battery, or 360Wh nominal energy, and a 350W motor. It omits a trustworthy bike-weight figure and detailed brake identification, limiting any confident comparison with a better documented commuter.
Published specification
| Frame | 26-inch alloy frame |
|---|---|
| Motor | 36v 350w |
| Battery | 18650 lithium 36v 10ah |
| Brakes | Full Suspension and dual disc brakes |
| Max Speed | 25km/h |
| Max Load | 120kg |
| Wheel size | 26" |
Specifications can change between markets and production batches. Match these entries to the exact supplied version.
What stands out
- Published battery information: 18650 lithium 36v 10ah
- Model-specific source and weight evidence: Not clearly specified
Limitations and unknowns
- The reviewed power or speed claims fall outside ordinary British EAPC assumptions.
- Catalogue range and performance have not been independently measured.
- The supplied regional configuration and proprietary spare-parts support need written confirmation.
Battery and range: what the figures mean
The Sundance BK1 battery is listed as 18650 lithium 36v 10ah. Multiplying nominal voltage by amp-hours gives approximately 360Wh of stored energy; this is a calculation from the catalogue, not a usable-capacity measurement. Reserve energy for cold conditions, hills and an ageing pack rather than designing a journey around the headline maximum.
Weight, storage and equipment
The published Sundance BK1 weight entry is Not clearly specified. Read the definition carefully: a shipping figure, accessory-excluded net weight and complete-bike weight answer different questions. For practical ownership, check the mass you will actually lift with the battery, rack and daily equipment installed, and try that lift before deciding on upstairs storage.
The Sundance BK1 lists 26" tyres. Check replacement availability using the tyre’s ETRTO marking rather than a nominal inch size alone. The published frame or fork entry is 26-inch alloy frame; this identifies equipment, but does not demonstrate damping quality, steering behaviour or braking distance.
Regional specification and British road use
The reviewed Sundance BK1 specification cannot be treated as an ordinary British EAPC on the published power or speed claims. Pedals, a speed-limited menu setting or a UK-labelled sale page do not establish compliance. A machine outside the EAPC rules may need motor-vehicle approval and the corresponding registration, insurance and licensing; permitted off-road use also requires appropriate access.
Support and the checks before ordering
The BK1 evidence comes from Eko Bikes’ product page rather than a confirmed manufacturer manual. Ask for the manufacturer or importer’s identity, an assembly manual, battery and charger markings, a bike-weight figure and written parts support. The shared BK1 name does not demonstrate any relationship with another brand’s model.
Sources and review method
Supplier statements are attributed to the product page. Practical assessments are RideIn’s interpretation of that evidence. There is no independent range, braking, durability or ride-quality test behind this article.