250W 48V Conversion kit

250W Cassette Hub Motor Conversion Kit – Plug & Play, Road-Legal Mode

Hello, Welcome to powerlinecycle
We offer high-quality electric conversion kits for bikes with rear dropouts of ≥135 mm and HG cassette drivetrains (1–11 speed). This 250W kit is compact yet powerful for its class.(Actual performance depends on rider weight, terrain, and weather.)

What’s in the Box

• All plug-and-play waterproofconnections
• 250W brushless geared rear hub motor (HG cassette body, fits 135 mm dropout)
• All-black MTX39 lightweight double-wall aluminium rim
• 36 stainless spokes (black)
• S866 colour display
• 17A DC Moto controller (36V / 48V / 52V), XT60 female
• 2-in-1 data cable
• Slim half-twist throttle + left-hand grip (stealthy look)
• Pedal Assist Sensor (PAS)
• Waterproof controller box
• Headlight (controlled via the display)
• Tyre levers, cable wrap, cable ties
• Waterproof motor extension cable

Road-Legal Mode (UK)

• Hold the down button on the display to activate road-legal mode
• “Walk/Person” icon shows when active
• Limits PAS to 15.5 mph (25 km/h) and disables the throttle
• m To be road-legal, use PAS only with the throttle off

Cassette Options

We can install a 7/8/9/10-speed cassette if you add one to your order from our store.
7-speed requires a 2.5 mm spacer.

Use Without Certain Accessories

• You may run throttle-only or omit PAS on private land/off-road
•  For road-legal use, PAS must be used and the throttle disabled

Warranty

• 3-month warranty on the kit
•  12-month warranty on the battery (if purchased)

Optional Extras

Prefer a full twist throttle?

 Leave a note at checkout and we’ll swap it in.

 Tips & Tricks

• Chain whip & cassette tool required
• Ensure the axle seats fully in the dropouts; tighten both 19 mm nuts
• Remove the transport spacer before installing the disc rotor
• Lightly grease the cassette spline before install
• Use slime inner tubes to reduce punctures
• Remove the brake caliper for easier wheel installation
• If the wheel doesn’t spin freely, check phase wires aren’t touching
•  Apply thread-lock to rotor bolts to protect the motor cable
• Recheck spoke tension after initial rides
• Fit a torque arm if possible for added safety

Shipping

• Orders tested & processed within 24 hours of cleared payment
• Couriers: FedEx, DPD, UPS, Parcelforce, Royal Mail (size & location dependent)
• Fully tracked shipments; weekend delivery available (extra charge)
• Typical delivery window: 1–2 days once dispatched

Returns

• 14-day return policy
• Item must be unused with all components & accessories
• Buyer covers return shipping