Looking for a cousin who wants a folding electric bike. I've built one before around five years ago and I'd love to build one again but
she lives on the other side of the country so there's no way I could offer support. (Insert obligatory picture here!)
I had a look around at electric...
Thanks for all the suggestions.
I ordered the shortest cable from ebike solutions and it's actually the perfect length. It's fitted to the bike now and I'm glad I went ahead as the original joined lead was showing signs of wear.
I'll find some time in the next week or so to write up the build...
I reckon that's exactly what I need. 30cm is a mite too long but I can fold the extra 10cm in the controller box easily enough.
I've been meaning to document my build in case it would be of any help to others so I'll get around to that in the next week or so.
Yes, I've done that but I feel it's a weak point on the bike. It flexes every time it's folded and though I don't fold it often, it's definitely something to be aware of. A custom lead would really do the job.
I'm wondering if there's anywhere I can have a motor cable made up to a specific length, say around 20cm. I'd need female on one end, male on the other to connect the controller to the hub motor.
When I built my ebike four years ago, I cut the supplied cable and soldered it together. It's...
I converted a Tern in 2014 which would be quite similar to the Dahon. I used a front hub motor and mounted a Frog battery at the front, using the luggage mounts.
It worked out pretty well. If you want any more details, let me know.
Brompton certainly do hub gears. The two speed has a derailleur at the rear, the three speed is a hub gear and the six speed combines the two systems, albeit with different (wider) gearing for the hub.
They're a great bike but I didn't power mine. I built an electric folder based on a Tern nine...
Ok, confused again!
When we were talking about upgrading the frog battery, I was under the impression that I would just change the battery and drive on.
Going with the shark battery, it's the same voltage (or is it slightly higher?) and I'll also need a new controller.
That's not a huge issue...
Good point of course. I've been lucky so far with stuff coming from China but you never know. I came across some ebay sellers but £180 versus £300 is a fair difference, even given the chance of being caught by customs.
I'm in no great hurry as I want to enjoy my bike while the weather is...
Just looking around at my options and I see that for $300 shipped I could get one of those 'shark' type batteries in 48v form (pic attched). It's a little bit more expensive than making a frog but it can be charged much more simply.
I'm experiencing the dreaded frog battery droop already so this...
So does that mean I have to either have two chargers or charge them one after the other?
My current setup has a number of cells wired in series to produce 36V. I thought that moving to 42 would just be a case of replacing the cells in series and working away. Am I completely wrong?
That's mighty. I'll give that a go.
After I move to 42v is there any point pursuing the 328 rpm motor or am I wasting my time?
I see that battery is 8Ah, compared to my own which is 10, but that's not a huge issue.
I'll see if they have anything equivalent with higher capacity on that site but...
Greed is a terrible thing and only a few days after my initial build I'm craving more speed.
I had the bike out on a 10k run the other night and I found that even on a decent downhill
stretch, it wouldn't go over around 28 km/h without huge effort.
With a 20" wheel and a 286 rpm motor, it runs...
The controller was set to current control by default. I changed it to speed control just for pig iron and I think the bike is much better.
There seems to be more power in the mid-range and the bike is even easier to ride.
Power tails off completely just after 25 km/h even though I've set the...
Thanks. Will keep an eye out for that.
In any case, I'll mount it a little higher as it's fouling the brake line slightly on the fold. I'll get away with it for now but there are a few more little things I want to do but they can all wait for the winter months.
Just given it the first test ride...
Now you tell me! Thought I'd be grand going by the arrows.
Happily, it turned out alright.
Wired it all up in around an hour and it works. Just need to adjust the brakes tomorrow and it's ready for its first road test.
I'm using a large unused workspace in the office so I had room to give it a...