About this deal
This is the brain of the e-bike and can be fully adjusted to needs. This controller is used on wide range of folding e-bikes. the 16inch and 20inch models. There are connections to attach and operated many functions such as headlights that are controlled by the LCD screen via this controller. This device is rated at 36V and can handle motor sizes between 250V-350V easily.
Reviews
Freddie
I can get quite lazy knowing this. This was plenty as the path was busy and narrow in places and to go any faster would have been dangerous to myself and others. The D4S is considered fast, light, and cheap.
David R.
UPDATE: I invested in a good bicycle pump and after another 10km (albeit off-road) I've not felt the back sliding. Bike is well finished and seems a lot better than the one I looked at in Halfords which had a poor finish overall.
Robert Jay Walker
Make sure you tighten the pedals - a mistake I made and had to walk with bike until I got home, sorted now! I (5'9", 60kg) have ridden 25km using all levels of assistance (40% @0, 30% @1, 15% @2, 15% @3).
jackie milner
The controller functions a bit like a gearbox in that as long as you move the pedals, it will power your bike! All that being said, it is great fun. I also found the bolt on the gear cable was 9mm when the nearest supplied spanners were 8 and 10mm. See Photo.
a public profile name
A 6mm spanner was needed to adjust the rod behind the central latch. It's a nice bike to ride and the motor kicks in as soon as you start turning the pedals so you don't have to put much effort in when on the flat. I recommend taking some tools out with you on the first ride as you will more than likely need to make some slight adjustments to the gear’s, the procedure is documented in the owner’s manual.