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KT do a bluetooth module that replaces the LCD. I've got a couple somewhere, but never tried them. You'd have to set the power level before you set off. That's going to be a problem when you come to a hill unless you have a throttle. I got mine from https://ebikesets.com/home/ The website...

'70s. They don't make songs like they used to!

A derailleur is hard to beat. In 6 years and 5000 miles, I had to replace one chainwheel that was worn before I started and one chain. I also had to replace a gear cable that was well-used before I started, but that would probably happen with any system. In that time, I've never cleaned the...

I see these on a few parts websites, including Bafang. Their appearance is identical to the KT LCD4, except there seems to be a yellow button on top...

They don't quite match the HD image. They just got normal electric bikes an put HD badges on them. You could buy a Cube and put some HD decals over the Cube writing and get the same only (no doubt) cheaper plus you get better dealer support...

Try Jimmy. Maybe he's got a smashed up case somewhere. Failing that, you can get the jack socket from Ebay and mount it to any flat piece of plastic that you can glue over the aperture. Get them as a pair so they definitely fit...

It's still 7w extra input for 2W lights! That's 7% extra pedal power that I'd have to add on a normal ride, compared with zero extra effort for non-dynamo lights. As I said, you can't change physics. Stick to your religion. I'm happy with being an athiest.

A hub-motor would be much more suitable for your application. A 260 RPM one will get you top speed of around 34km/h and a cruising speed of about 30 km/h. For a cruising speed of 33 mph, you need 48v and a 328 rpm motor, which means running a 36v 260 rpm one at 48v or get a 48v 328 rpm one...

How many cases do you hear of police prosecuting or insurance not paying out because people didn't have reflectors front and rear or lights that complied with the British standard or equivalent? Do you have those things on your bike when you ride between sunset and sunrise.?

I guess I need to set my horizons wider. The only time I ever had to remove anything from my derailleur in around 25000 miles was when I tried that White Lightning chain lube, which completely gummed up the derailleur and took ages to get out. I think that a gearbox arrangement is perfect for...

Yes, but I guess you didn't, so let me explain. It'so that they could put that 7W of extra input power in perspective. 12ohms is 2W of supply power for lights. I can't think of any lights that I'd want to use with a combined input power of 2 watts.

They have 14mm axles. It's the weight more than anything. You just can't conceive how heavy they are if you're used to dealing with 250w geared motors.

Did you see the bit about the 12 ohm load?

You have to pedal 8% harder if you have 3W total lights and normally pedal with 60W input. You can't change the laws of physics (first law of thermodynamics) no matter how much you wish you could. Here's some lab test results that show that my estimate was about right, a bit underestimated if...

I doubt that LBS will touch it. The motor wheel is extremely heavy and won't fit any standard wheel-building fixture. When I did one, I had to build a fixture out of timber and other hardware first. If you were paying a shop an hourly rate for all that, the total cost would be more than the...

Yes. Remove the pedal arm with a crank puller, then the sensor can be pulled off. There's a screw on the inside that allows you to separate the two halves. Before pulling it off and after the pedal arm is removed, you can observe whether the inner part is turning. It might be jammed with dirt...

You can buy the whole 1500W ebike kit from Amazon or Ebay for about £150 that includes the motor wheel, controller, throttle and everything. just swap the wheels and keep the rest for spares. If you're totally ham fisted, Hammer Bikes in Northampton will probably sort it for you if you ask them...

Resistance from the dynamo is tiny when you have the lights switched off, but it's significant when you switch them on. Try it if you don't believe me. Say you have a normal 3W Shimano hub dynamo, you'd have to put in around 5W to get 3W out. That's 5% extra pedal effort if you're able to...

All normal batteries are compatible. It's only OEM batteries for bikes with Bosch, Yamaha, Raleigh, Shimano, etc systems that aren't. The only requirements for the battery is that it can give you the power (amps) that your controller takes from it and has enough range for what you need.

It doesn't make any sense at all to fit a dynamo to an electric bike. Why would you want to use electricity from a battery to turn a motor to turn a wheel that turns a dynamo to generate electricity for a light, while losing some of the electricity along the way, when you can take the...