4000W Conversion Kit 72v - 40Ah

🚴 Alpine Rides

We supply high-quality electric bike conversion kits built for riders who want serious performance, durability, and a full DIY setup that delivers strong power on demand.

⚡ Compatible with most bikes using 120mm–185mm rear dropout spacing
Suitable for MTB, hybrid, and custom frame builds.

📏 Wheel sizes available: 26", 27.5", 29"

Please check compatibility before ordering.

⚡ 4000W MTX E-Bike Conversion Kit

The 4000W kit is built for riders stepping into extreme performance. It delivers aggressive acceleration, very high torque, and serious climbing power for demanding terrain and high-load riding.

This setup is aimed at experienced builders looking for a powerful, high-output e-bike system.

🔋 Motor & Wheel Setup

4000W brushless gearless hub motor (direct drive)

High torque design for extreme acceleration and hill climbing

M14 axle with screw-on freewheel (single speed)

Black SunRingle double-wall aluminium rim

36 stainless steel black spokes

Fits 120mm–185mm rear dropout spacing

🎛️ Controller Options

Square wave or sine wave controller available

72V system setup

90A high-power controller

Waterproof controller housing included

XT150 high-current connectors

Very strong throttle response and power delivery

🖥️ LCD Display & Riding Modes

LCD display included for full ride monitoring and control.

Displays:

Speed

Battery level

Trip distance

Power output

Assist level

Riding modes:

Eco

Comfort

Sport

Sport Plus

🛑 Controls & Accessories

Full twist SurRon-style throttle

Hydraulic & mechanical brake sensor compatibility

Black MX grips

Brake disc spacer included

Rotor bolt kit included

🛡️ Frame & Installation Kit

4x heavy-duty stainless steel torque arms

Cable protection wrap

Cable ties included

Tyre levers included

🔋 Battery Information

All batteries use Grade A 21700 cells for high performance and reliability.

✔ High discharge capability

✔ Long cycle life

✔ Stable output under heavy load

🎁 Free battery bag included with every kit

⚡ Performance

Very high 4000W power output

Extreme acceleration and torque

Strong hill-climbing and load capability

Performance depends on rider weight, terrain, weather, and battery setup

🛡️ Warranty

3-month warranty on kit components

12-month warranty on batteries

Warranty does not cover water damage, misuse, or modified wiring/connectors.

🚚 Shipping

🌍 We ship worldwide

📦 Batteries and kits may be shipped separately depending on order

🔎 Fully tracked delivery on all orders

🚛 Shipping tier selected at checkout determines delivery speed

⏱️ Delivery times depend on shipping option chosen:

Standard shipping: longer delivery time

Express shipping: faster processing

⚡ Fastest shipping option: typically around 4-14 days

📅 Delivery times may vary depending on destination, customs, and courier handling.