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OK, So I thought I'd try the Zefal Doorback 2, based on above recommendation, as I'm just fininishing a new bike build. My conclusion is that the mirror's fine, but the folding is shite. Basically it doesn't fold. It just changes angle so that you can get your bike through a gate or whatever...

Mine is groaning after just a few hundred miles. If I don't use it for a few days, it starts groaning for about 5 miles, then goes back to quiet mode. It needs a strip down and regrease.

Do you remember in January 2020 the videos of Chinese people dropping dead in the street - supposedly from covid? Do you remember the stories about Pangolin monkeys shagging chickens to make the virus? That was the Chinese media. Do you remember the stories about the Hunter Biden laptop being...

You seem to have forgotton the difference between input and output power! Unfortunately, Flecc's not quite right when he says 750w actual power is simple because it's actually quite difficult to check. You'd need a calibrated dynamometer and controlled external conditions. He's right that it's...

You've no idea how many were actually sold. That's just a press release from the fake media that you read.

It can be legal when AKM stamp 250w on it.

They said that about the VW Buzz three years ago. Three years later, they're selling 2022 registered ones with zero miles at huge discounts. Look on Auto trader. There are loads of them.

Unfortunately, Suntour don't give out the battery error codes. All we know is that it's indicating an error, which is probably a low cell. If you know anything about electrics, you can open it up and test it. Did it do that after a long period without use? Was it OK before it did that? How old...

The phase wires are normally soldered to the coils, not the pcb.

Simple answer: Set P2=1. If that doesn't fix it, you need to fit a wheel magnet type sensor.

Good point, Benjamin, disconnect the brakes and see if the problem goes away.

Show a picture of whatever is flashing so that we know which version you have, and describe exactly which lights are flashing so that we can decode the error message.

Software either works or not. It can't glitch. There are only two possibilities: 1. You have a connection fault; 2. Temperature is going too high. Neal, what happens when the temperature goes too high? Does the LCD show anything? My motor is faster than yours. I still stick to the 15 mph...

The way I repair them is to buy a motor cable from eBay for £10 or less from AliExpress if you can wait a week. Unsolder the 9 wires on the inside of the motor after marking which is which. Thread through the new cable and solder it. The tricky bit is to get the cable past the right angle bend...

Q128 has an internal speed sensor, but maybe the magnet has come unglued.

If your motor doesn't have a speed sensor, you need to get an external one. Either way, you set P2=1. Some motors have 6 magnets for the speed sensor which will make the speed display 6 times too high with P2=1. therefore you set it to 6.

Zefal Cylops is the best I've tried. There are other mirrors from Zefal that are also pretty good, but I find the Cyclops better in the way it folds when you park your bike at the shops. Zefal Cyclop Triple Adjustment Bar End Mounted Bike Mirror | eBay UK

The speed reading comes from the speed sensor. If there's no speed signal from it, or if you have P1=0, the controller will take the speed signal for the LCD from the motor halls, which is why you have to enter the number of magnets and reduction ration. In that condition the speed would show...

I've been on this forum for 15 years. Ever since the beginning we've been getting monthly reports and articles about the latest breakthrough in battery technology, which will give us infinite range, power and safety. We're still waiting for something to actually happen. Instead of any...

I ran my 328 rpm Q128 at 48v with a T06S for 14 years without any problems. They're probaly thinking of 200kg Americans riding without pedalling after shunt-modding their T09S. I now run it with a 22A 6 MOSFET KT controller, though not used it enough enough to say that it wouldn't overheat in...