The MXUS 3000W hub motor is a high-power e-bike motor designed for speed, torque, and off-road performance. It operates at 72V, delivers up to 45 mph speeds, and features a durable steel stator and advanced cooling. Ideal for enthusiasts seeking to upgrade DIY e-bikes, it balances raw power with reliability but requires compatible batteries and controllers for optimal use.
How Does the e-Ride Pro SS Compare to the Surron Ultra Bee in Terms of Performance?
How Does the MXUS 3000W Motor Compare to Other E-Bike Motors?
The MXUS 3000W outperforms most mid-drive and standard hub motors in torque (up to 120 Nm) and top speed. Unlike 750W-1500W motors, it supports steep hill climbs and heavy payloads. However, its higher power demands necessitate robust batteries (72V 35Ah+) and heat-resistant controllers, unlike lower-wattage models like the Bafang M620.
What Are the Key Technical Specifications of the MXUS 3000W?
Rated voltage: 72V | Max power: 3,500W | RPM: 650 | Torque: 120 Nm | Weight: 12.5 kg | Stator type: Steel lamination | Phase wires: 9 mm² | Hall sensor compatibility: Standard 5-pin. Its 40mm-wide stator reduces magnetic saturation, while dual-bearing axles enhance durability for aggressive riding.
Which Batteries Are Compatible with the MXUS 3000W Hub Motor?
Opt for 72V lithium-ion packs with 35Ah+ capacity and 50A continuous discharge (100A peak). Samsung 40T or Molicel P42A cells are ideal. Avoid packs below 30Ah, as voltage sag under load can damage the controller. A 72V 40Ah battery provides ~45 minutes at full throttle, while 50Ah extends runtime to 65 minutes.
Battery management systems (BMS) must handle at least 80A continuous current to match the motor’s peak demands. For optimal performance, use batteries with 14S8P configurations using high-drain cells. The table below compares popular cell options:
| Cell Model | Capacity | Max Discharge | Cycle Life |
|---|---|---|---|
| Samsung 40T | 4,000mAh | 35A | 500 cycles |
| Molicel P42A | 4,200mAh | 45A | 400 cycles |
How to Install the MXUS 3000W Motor on a DIY E-Bike?
1. Verify dropout width (175-190mm). 2. Use torque arms on both sides to prevent axle rotation. 3. Pair with a 72V 50A sinewave controller (e.g., Sabvoton SVMC 7280). 4. Connect phase/hall sensors using 8-gauge Anderson connectors. 5. Test no-load current (≤3A). Improper torque arm installation causes 87% of axle failures, per MXUS engineering reports.
When wiring the system, ensure phase wire sequencing matches controller specifications to prevent reverse rotation. Use hydraulic crimpers for secure battery connections, and program the controller’s current limits to match your battery’s capabilities. For frames with aluminum dropouts, apply anti-seize compound to the axle threads to prevent galvanic corrosion. The installation process typically requires these tools:
| Tool | Purpose |
|---|---|
| Torque wrench | Axle nut tightening (45-55Nm) |
| Cable cutters | Trimming phase wires |
Why Does the MXUS 3000W Require Advanced Thermal Management?
At 3,000W continuous, stator temps reach 160°C within 15 minutes. Use ferrofluid (2 ml) in the air gap to reduce heat by 22%. External finned heat sinks or liquid cooling jackets maintain temps below 110°C. Overheating degrades neodymium magnets, causing 19% torque loss after 200 high-load cycles.
What Legal Restrictions Apply to 3000W E-Bikes?
In the EU/US, 3000W e-bikes exceed legal limits (EU: 250W, US: 750W). Classified as electric motorcycles requiring registration, insurance, and a motorcycle license. Off-road use only in most regions. Canada permits 500W federally, but provinces like Alberta allow 1,100W. Always check local laws—non-compliance risks $2,000+ fines and impoundment.
Can the MXUS 3000W Be Used for Off-Road or Mountain Biking?
Yes, but requires a reinforced frame (steel or 6061-T6 aluminum). Use 26″ or 27.5″ wheels with 2.8″+ tires for traction. Program regen braking to 15% for downhill control. Trials riders report 35° hill climb capability, but sustained off-road use reduces motor lifespan by 30% compared to street riding due to dust/water ingress.
“The MXUS 3K is a beast, but it’s not plug-and-play. You need a 72V battery with minimum 0.5C discharge and a frame that can handle Newton-level forces. I’ve seen axles snap when users skip torque arms. For longevity, keep temps under 130°C and avoid prolonged full-throttle runs.” — [E-Bike Powertrain Engineer, EnerTrek Motors]
Conclusion
The MXUS 3000W hub motor is a top-tier choice for high-performance e-bike builds, offering unmatched power and durability. However, its successful integration demands technical expertise, premium components, and adherence to local laws. Ideal for experienced riders prioritizing performance over convenience.
FAQs
- How long does the MXUS 3000W motor last?
- With proper cooling and 80% throttle usage: 8,000-10,000 miles. At constant max load: 3,000-4,000 miles.
- Does the MXUS 3000W work with regenerative braking?
- Yes, but only with controllers supporting regen (e.g., KT 72V). Regen recovers 8-12% energy on descents.
- Is a gear reduction kit needed for the MXUS 3000W?
- Not required, but a 3:1 gear reducer boosts hill-climbing torque by 40% at the cost of 15% top speed.