QS138 90H V3 Water-Cooled Mid-Drive Motor | Bulk Order for Dealers

Key Advantages for Global Bulk Buyers: Premium Quality, Stable Supply, Full Support

Superior Product Value: Quality, Cost-Efficiency & Customization

Unmatched Durability & Reliability

• * Water-Cooled V3 System: Advanced liquid cooling ensures stable performance during prolonged high-power output, preventing overheating in harsh conditions (e.g., steep slopes, heavy loads).
• * IP67 Protection: Dust-tight and waterproof, resistant to rain, mud, and extreme temperatures—perfect for off-road and all-weather use.
• * High-Efficiency Core: ≥90% energy efficiency, reducing battery consumption and extending vehicle range. Low noise (≤50dB) for a smooth ride.
• * Premium Materials: High-grade neodymium magnets (90mm height) and reinforced internal gears (ratio 1:2.35) deliver consistent power and long service life.

Impressive Performance Specs

• * Rated Power: 4,000W | Continuous Max Power: 7,500W | Peak Power: 13,500W
• * Rated Voltage: 72V (compatible with 48V–78V systems)
• * Max Torque: 150N·m | Rated Torque: 32N·m
• * Max Speed: 4,800RPM (7,000RPM with field weakening)

Competitive Pricing & Flexible Customization

• * Factory Direct Pricing: bulk order discounts for long-term partners.
• * Custom Solutions: Tailor voltage, power output, gear ratios, and mounting brackets to your vehicle models. Add logos, labels, or packaging per your requirements.

• * Wide Compatibility: Fits 17–21” wheels, compatible with major controllers (e.g., Fardriver, ASI) and battery packs.