Ventus Ryuga 81kW Motor| for Surron Ultra bee |By Ventus Bikes VTB

• Peak Power: 60.3 kW at 72V, 81 kW at 96V
• Peak Torque: 114 Nm at 1400A, 73 Nm at 850A
• Protection Rating: IP67 water and dust sealed
• Pole Pairs: 4
• Max Efficiency: 95 percent
• Insulation Class: 250°C
• Temperature Sensor: NTC 10k B3905
• Position Sensor: Encoder ABZP
• Cooling Method: Natural air cooling
• Tested Top Speed: 180 km/h at 72V, 195 km/h at 96V (46T sprocket, 62.5 cm wheel)
• Weight: 12.5 kg
• Dimensions: Φ173 × 180.8 mm
• Phase Wire Gauge: 35 mm²
• Max RPM: 14,000 rpm
• KV Value: 118
• Motor Type: Hairpin winding
• Product Model: RGA81
• Compatible Bikes: Ultra Bee only

Performance Highlights

The Ryuga 81kW’s performance curves on page 3 show massive torque available from near-zero RPM with extremely stable power delivery through mid and high ranges. Efficiency maps confirm high efficiency up to 95 percent across real riding conditions.

• 92.8 Nm torque available as low as 500 rpm
• Over 60 kW at 72V and 80+ kW at 96V
• High efficiency throughout 2,000–12,000 rpm range
• Designed to maintain power under continuous load

Why Choose the Ryuga 81kW?

• Built specifically for the Ultra Bee platform
• True plug-and-play fitment—no fabrication or adapters
• Hairpin stator technology for maximum power density
• High RPM ceiling for extended high-speed riding
• High phase wire gauge (35 mm²) for extreme current handling
• Fully sealed IP67 construction for wet and dusty environments