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Mechanical Brake Levers with Motor Cut-Off Sensor, Pair (generic)

Cut-off brake levers are the standard way hub-motor kits stop the motor the instant you brake: a small switch in the lever sends a signal to the controller when you pull. Generic pairs come with either a 2-pin Julet waterproof plug or a small SM plug and work with mechanical disc and rim brakes (V-brake pull on most). They are a cheap safety upgrade for kits that shipped without cut-offs and a straightforward replacement when a lever switch fails. If your bike has hydraulic brakes, you want a sensor add-on or hydraulic levers instead.

Hub-motor conversion kits with mechanical brakesReplacing a failed cut-off lever on a kit bikeAdding motor cut-off to a kit that came without it

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Key considerations

Match the plug: 2-pin Julet vs SM plug vs bare wires
Check cable pull type matches your brakes (V-brake/mechanical disc vs caliper)
Some controllers expect a normally-open switch, a few the opposite — check your controller spec
Clamp fits 22.2 mm bars

Pros

Inexpensive
Direct fit on most kits
Improves safety

Considerations

Plastic feel
Plug variants
Mechanical brakes only

Compatibility notes

Controllers with a standard brake cut-off input; mechanical disc and V-brakes only — not for hydraulic systems

Keep it running

Replacement parts

Confirm fitment on your bike before ordering — see each part’s compatibility notes.

E-Bike Brake PadsFeatured

Tektro E10.11 Disc Brake Pads

Best for: E-bikes with Tektro HD-E350, HD-M275/M285/M290 style calipers and Aries/Novela mechanicals · Riders who want the OEM pad shape without guessing · Replacing worn resin pads at the first squeal

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Similar alternatives

All brake levers →

Brake Levers

Hydraulic Brake Cut-Off Sensor with Magnet (generic)

When you convert a bike with hydraulic brakes, you usually do not want to swap out the levers. The fix is a stick-on cut-off sensor: a small hall sensor that glues to the lever body with a magnet on the lever blade, so the signal is sent as the blade moves. Sold in pairs, typically with a 2-pin Julet waterproof plug or bare wires. Installation is simple but placement matters — the magnet must sit within a few millimeters of the sensor at rest and move away when you pull. A little patience with the alignment makes the difference.

Best for: Mid-drive and hub conversions on bikes with hydraulic brakes · Riders who want to keep their existing levers · Replacing a failed sensor on a bike that uses this style

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E-Bike ControllersFeatured

KT 36V/48V 22A Sine Wave Controller

KT (Kunteng) controllers are the de facto standard in the conversion-kit world, and the 22A sine wave unit is the one most people end up with for a 500W–750W hub motor. Sine wave drive is quieter than square wave and smoother off the line. KT controllers talk a specific serial protocol to KT displays (LCD3, LCD8H and friends), so if you already have a KT display this is the natural match; if you have a different display, plan to replace both. Connectors are typically the Julet/Higo waterproof style, which makes wiring tidy but ties you to matching plugs.

Best for: Replacing a dead controller on a KT-based conversion kit · Upgrading a noisy square wave controller to sine wave · Pairing with a KT LCD display

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