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Electro City Bikes

E-Bike Conversion Kit, MTX Rim 250WATT, 27.5/29/700C

E-Bike Conversion Kit, MTX Rim 250WATT, 27.5/29/700C

Regular price £239.99
Sale price £239.99 Regular price
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36V 250W MTX E-Bike Conversion Kit (SW900 LCD + 15A Controller + Controller Box) – Rear Hub Motor Wheel

Convert your bike into a smooth, reliable commuter with our 36V 250W eBike conversion kit, built on a heavy-duty MTX rim for strength and stability. This rear hub motor conversion kit includes the SW900 LCD display, a matched 36V 15A controller, and a controller box for a cleaner, more protected install.

Why riders choose this 36V 250W kit

  • Efficient 250W assistance for everyday riding and commuting.
  • MTX rim wheel build for durability on real roads.
  • SW900 LCD display for speed, trip/ODO, assist levels, battery readout and system info.
  • 36V 15A controller for stable power delivery and predictable acceleration.
  • Controller box included to help keep wiring tidy and the controller protected.

What’s included in the kit

  • 36V 250W rear hub motor laced into an MTX rim (wheel supplied as per your selected variant)
  • 36V 15A controller
  • SW900 LCD display + handlebar control buttons
  • Controller box
  • Main wiring harness + essential installation hardware

Battery not included unless your chosen option states otherwise.

Core specifications

System voltage 36V
Motor rating 250W hub motor (rear wheel)
Controller 36V 15A
Display SW900 LCD
Wheel build MTX rim
Controller protection Controller box included

Battery range comparison (36V)

Range depends on hills, speed, tyre pressure, temperature, rider weight and assist level. To keep it honest, the table shows three real-world scenarios: Eco (8Wh/mi), Typical (12Wh/mi), and High assist / hilly (20Wh/mi).

Battery Energy (Wh) Eco range Typical range High assist / hilly
36V 10Ah 360Wh 45.0 mi / 72.4 km 30.0 mi / 48.3 km 18.0 mi / 29.0 km
36V 13Ah 468Wh 58.5 mi / 94.1 km 39.0 mi / 62.8 km 23.4 mi / 37.7 km
36V 14.4Ah 518Wh 64.8 mi / 104.3 km 43.2 mi / 69.5 km 25.9 mi / 41.7 km
36V 15.6Ah 562Wh 70.2 mi / 113.0 km 46.8 mi / 75.3 km 28.1 mi / 45.2 km
36V 24Ah 864Wh 108.0 mi / 173.8 km 72.0 mi / 115.9 km 43.2 mi / 69.5 km

Compatibility checklist (before you order)

  • Wheel size: choose the correct wheel option for your bike.
  • Brake type: match your setup (disc vs rim) based on the wheel variant you select.
  • Battery: must be 36V and correctly connected to the controller.
  • Install quality: torque arms / correct axle seating and proper cable routing matter (especially on daily riders).

FAQ (36V 250W conversion kit)

What does the SW900 display show?
It supports key ride data like speed, distance (trip/ODO), assist levels and system indicators, with configurable settings.

Is a 15A controller a good match for 36V?
36V × 15A gives a peak electrical input around 540W under load (actual delivered power depends on controller limits, motor efficiency and riding conditions), which helps with usable torque while still being a sensible commuter setup.

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