Pendleton Somerby e bike

[Andgold]

Hoping someone might be able to point me in the right direction. My wife has a Pendleton somerby drop frame pedal assist e-bike, it came new from Halfords a few years ago. everything is working fine but she has had replacement ops to both knees and finds it hard to move the pedals 360 deg at moment. I’d like to fit a throttle control to the bike so she can use that instead till she’s got more mobility, does anyone know whether it’s easy on this model of bike, and how I might go about converting it. Thanks, Andy

 

[Nealh]

One will have to show us a pic or two of the controller and all of the wiring , if it is a rear rack battery then the contorller and wiring is located at the front of the battery ina compartment behind the front cover.
Following seeing pics , if there is no candidate to add a speed switch (aka a thumb throttle) then one has to change the display and controller to a nice KT set up.

Any speed switch adapation one makes will make the bike illegal and liable to being confiscated if the wife is stopped by plod.

But we can help one to make the bike easier to ride /use for the wife.

 

[saneagle]

Hoping someone might be able to point me in the right direction. My wife has a Pendleton somerby drop frame pedal assist e-bike, it came new from Halfords a few years ago. everything is working fine but she has had replacement ops to both knees and finds it hard to move the pedals 360 deg at moment. I’d like to fit a throttle control to the bike so she can use that instead till she’s got more mobility, does anyone know whether it’s easy on this model of bike, and how I might go about converting it. Thanks, Andy

Probably the easiest way is to spoof the pedal assist, so that she can operate the motor with a push-button. It's very simple to do, but will involve a bit of work with a screwdriver to get at the wires, which would be the same if you wanted to fit a normal throttle. To fit a throttle, you'd need to change the motor controller and re-wire everything. You can make the bike much better doing that at a cost of about £80. If you want to go that route, let us know.

The pedal assist sensor is very simple. There's a magnet disc that turns with the pedals. The magnets pass the sensor to cause a pulsing signal. When the controller sees the pulsing, it gives power according to which of the three levels you set, which are actually three different speed limits. It's connected to the controller by three wires: 5v, ground, and pulsing signal - probably red, black and some other colur respectively.

The device I'm showing you will make an equivalent pulse at the press of a button. The button switch would be on the red 5v wire, so your run a wire from the red on the pedal sensor connector up to the bars where you fit the switch and back to the pulse device. The black ground in that connector goes to the ground on the device and the output wire from the device goes to the thrird wire on the connector. That's it. In summary, unplug the pedal sensor and plug in the device. You can get the connectors from Ebay.

When you press the button, the device will make the same pulse as if you're pedalling (frequency about 12Hz), so the bike will think you're pedalling and give power accordingly. All other things will remain the same.

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This one would also work. You need the L (low frequency version). Set the adjuster screw about halfway, and if it doesn't work turn it down until it does.

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Connectors:

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Switch, or use whichever one you want:

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