Hello from London

[Marione]

Hi everyone I have a 20inch tern d8 folding bike which I converted with this kit

Robot Check

And this battery

Robot Check

I am obviously trying to find a solution to increase the speed as I dont believe it makes the 25km/h than should.
Unfortunately it doesn't have a speed senson at the wheel so not sure how it check the actual speed.

 

[Marione]

The battery is
A 48v 12.5ah Hailong lithium.

 

[indianajo]

Welcome to the site.
London pavement must be perfect to want to ride 25 kph on 20" tires. I get jarred sometimes on 26". At least you don't have railroad crossings. Every rail was grade separated when I was there in 2000.

 

[Marione]

Yes the pavement is not bad at all. The choice is because of the space in the house and just need something small to bring inside.

 

[E-Wheels]

Hi everyone I have a 20inch tern d8 folding bike which I converted with this kit

Robot Check

And this battery

Robot Check

I am obviously trying to find a solution to increase the speed as I dont believe it makes the 25km/h than should.
Unfortunately it doesn't have a speed senson at the wheel so not sure how it check the actual speed.

If no luck here you might want to try the UK Pedelecs Forum which is a good source of information for kit builds

Pedelecs – Electric Bike Community – All you need to know and chat about electric bikes

www.pedelecs.co.uk

Pedelecs - Electric Bike Community

The UK electric bike community

www.pedelecs.co.uk

 

[Dewey]

Is there a manufacturer name/serial/model number on the controller box? As the kit uses a KT display and therefore presumably a KT controller. If the speed setting can't be changed in the display, the controller box might need to be opened and some soldering work done on the circuit board to add a programming cable header like on this example to then connect to a computer to flash firmware with revised speed settings. The UK Pedelecs forum would be a good place to solicit advice on a shop in London or the SouthEast that might be prepared to work on it, or get advice on a replacement controller that would work with your kit.