Umbrail E-Gravel — Adventure
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QAVORYNTH Electric — the scheduled tailwind
Headwinds, washboard, one more valley — the Umbrail answers all three and still fits through singletrack gates.
Motors are integrated so cleanly that the bike reads as a bicycle first: cabling internal, battery structural, software updated over the air. Certified, serviceable, and supported by our workshop for the system's whole life.
Design & Build
- Mounts for frame bags, fenders, third bottle and dynamo routing
- Wireless electronic shifting, tuned and indexed under load
- Tubeless set up and tested — sealant in, pressures marked
- Clearance for 45–50 mm rubber with honest mud room
- Build sheet signed by the one mechanic who built it
- House carbon wheels, hand-built, tension-mapped and archived
- Mid-drive motor with silent engagement and natural assistance curves
Specifications
| Discipline | E-gravel, 25 km/h EU |
| Frameset | UD carbon, 50 mm clearance |
| Build | Adventure: racks, guards, 500 Wh |
| Motor | Mid-drive, silent engagement |
| Weight | ≈ 12.9 kg |
| Sizes | 49–58 cm |
| Warranty | Statutory 24 months under Czech law |
Care & Battery
Charge indoors at moderate temperature, store at 40–70% for breaks longer than a fortnight, and update firmware when the app suggests it.
Questions, Answered
How long does the battery last?
Batteries are warranted to hold 70% capacity after 500 cycles — several years of riding — and replacements remain available for a decade.
How does it arrive?
98% assembled with the battery charged for handover checks; registration documents where applicable ship in the box.