New
Ryuga 81kW Hairpin Motor
The Ryuga 81kW is VTB's flagship hairpin motor — a staggering 81 kW peak at 96 V, 114 N·m of torque and 14,000 rpm, with 95% efficiency and IP67 sealing. Engineered for the Ultra Bee and finished in eight colours, it pairs race-grade performance with 250 °C insulation and natural air cooling for relentless, repeatable power. When you want it all.
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Ryuga 81kW Hairpin Motor
Sale price$2,199.00
VTB · Ventus Bikes
Ryuga 81kW Hairpin Motor
Ryuga Series
The Ryuga 81kW Hairpin Motor is a hairpin e-moto motor delivering 60.3 kW @72V / 81 kW @96V with up to 114 N·m @1400A of torque and 95% peak efficiency. Rated IP67 and built for natural air cooling.
60.3 kW @72V
Peak Power
114 N·m @1400A
Peak Torque
14000 rpm
Max RPM
95%
Efficiency
Performance
| Peak Power | 60.3 kW @72V / 81 kW @96V |
| Peak Torque | 114 N·m @1400A / 73 N·m @850A |
| Max RPM | 14000 rpm |
| KV Value | 118 |
| Top Speed (tested) | 180 km/h @72V / 195 km/h @96V (46T, 62.5cm wheel) |
| Max Efficiency | 95% |
Construction
| Motor Type | Hairpin |
| Product Model | RGA81 |
| Pole Pairs | 4 |
| Phase Wire Gauge | 35 mm² |
| Insulation Class | 250 °C |
| Cooling Method | Natural air cooling |
Sensors & Protection
| Protection Grade | IP67 |
| Temperature Sensor | NTC 10k B3905 |
| Position Sensor | Encoder ABZP |
Physical
| Size | Φ173 × 180.8 mm |
| Weight | 12.5 kg |
| Compatible Bikes | Ultra Bee |