Search found 683 matches

by donn
Sep 18 2020 2:07pm
Forum: EBike General Discussion
Topic: Is DIY dying?
Replies: 40
Views: 1790

Re: Is DIY dying?

Here's one that looks as trivial to install as anything I've seen and weighs under 6 lbs. Kind of spendy, but not all DIY is low budget. https://newatlas.com/bicycles/elevate-mountain-bike-motor/ It comes with a special rear disk brake, with I think an extra geared disk kind of like a chainring. The...
by donn
Sep 17 2020 7:21pm
Forum: EBike General Discussion
Topic: 52 volt batteries proceed with caution
Replies: 27
Views: 1510

Re: 52 volt batteries proceed with caution

Inasmuch as what he's saying makes any sense, he's talking strictly about use with Bafang BBS02 and possibly BBSHD, which according to him derate 52V input so you get the same power as 48V. Someone who sells a 52V battery pack for one of these two motors , and 2. claims that it will deliver more pow...
by donn
Sep 17 2020 11:49am
Forum: EBike General Discussion
Topic: 52 volt batteries proceed with caution
Replies: 27
Views: 1510

Re: 52 volt batteries proceed with caution

Bafang mid-drives probably don't have much tolerance for voltages above 48. In a mid-drive ... well ... I don't know of a single reseller of mid-drive motors, EMP excepted that doesn't offer a 52V option. So Bafang mid-drives probably do have plenty of tolerance for voltages above 48, right? Not th...
by donn
Sep 17 2020 9:43am
Forum: EBike General Discussion
Topic: 52 volt batteries proceed with caution
Replies: 27
Views: 1510

Re: 52 volt batteries proceed with caution

Right, the confusion that seems to cast doubt on 52V packs per se, when the problem is only with these particular Hailong cases, needed to be cleared up. The speculation about voltage limits in Bafang crank drives, though, seems wrong - Luna and bafangusadirect seem to feel both the BBS02 and BBSHD ...
by donn
Sep 16 2020 8:49pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224372

Re: 2 Speed Xiongda hubmotor

He may have really meant something more like "is this a good idea", when he asked if this was "possible." Which is a very different question, and one that comes up every once in a while around here, but unfortunately I have no links. Would the interesting thing about this motor b...
by donn
Sep 15 2020 9:41pm
Forum: EBike General Discussion
Topic: Is DIY dying?
Replies: 40
Views: 1790

Re: Is DIY dying?

A 48v/52v mid drive with a battery in the 15ah range and torque sensing (that can be bolted directly to most bikes) that weighs in the neighborhood of 10-12 pounds for everything would be the holy grail for me. I don't see that happening any time soon though. Not when the battery leaves you only 0-...
by donn
Sep 15 2020 5:03pm
Forum: EBike General Discussion
Topic: Is DIY dying?
Replies: 40
Views: 1790

Re: Is DIY dying?

Are we going to see lighter, more powerful motors and batteries aimed at the DIY market? Or will DIY fade away as mass produced ebikes get more powerful and cheaper? These are not alternatives to each other. "More powerful" is meaningful to a lot of DIY types here, but only because this i...
by donn
Sep 14 2020 11:13pm
Forum: EBike Technical
Topic: e-Tricycle for adults
Replies: 48
Views: 905

Re: e-Tricycle for adults

learn to ride an entirely new type of vehicle That seems to me like the least of your worries. I gather she's in on this, and it really depends on what she thinks she'll like, but with tricycles there really isn't much to learn, is there? If she's game, she'll be fine. Nor would I worry about traff...
by donn
Sep 14 2020 11:00pm
Forum: EBike Technical
Topic: Is regenerative braking really worth anything?
Replies: 104
Views: 3244

Re: Is regenerative braking really worth anything?

Exactly, If you are live or trek through very mountainous regions then you might want to consider it, but for the remaining 95% of us it is meaningless. No, you're way off, on the "very mountainous" and the 95%. Why is it so urgent to discount regen, that you'll make a fool out of yoursel...
by donn
Sep 14 2020 7:53pm
Forum: EBike Technical
Topic: e-Tricycle for adults
Replies: 48
Views: 905

Re: e-Tricycle for adults

I'm a recumbent rider too, and if I ever wanted to ride a tricycle I'd sure look into the Hase options first. They've been doing it a long time and have a very good reputation. I sure wouldn't go for the above seat steering option, though. I've had a chance to compare above and under steering on the...
by donn
Sep 14 2020 3:16pm
Forum: EBike Technical
Topic: Hmmmm, regen
Replies: 4
Views: 159

Re: Hmmmm, regen

Has the regen EBS force level been set to an unusually high level?
by donn
Sep 14 2020 3:12pm
Forum: EBike Technical
Topic: Is regenerative braking really worth anything?
Replies: 104
Views: 3244

Re: Is regenerative braking really worth anything?

According to my CA I'm getting 14-16% back from regen, but it's very steep here, next to no flat ground. That's really 12 to 14%, if you discount CA regen, and I'm pretty sure you should. It's overstated, though not "grossly". The problem is that they divide the regen watts by the net wat...
by donn
Sep 12 2020 12:10pm
Forum: EBike General Discussion
Topic: Hi just to make sure!! voltages, amps and watts
Replies: 6
Views: 283

Re: Hi just to make sure!! voltages, amps and watts

Not sure I'm buying that one. Mostly not sure a half an amp difference is enough to feel, or for the motor to care about in terms of time to overheat. It may be true though, that a big controller wastes less amps into heat, than a tiny one running full out or something, causing that too small to ma...
by donn
Sep 11 2020 3:39pm
Forum: EBike General Discussion
Topic: Hi just to make sure!! voltages, amps and watts
Replies: 6
Views: 283

Re: Hi just to make sure!! voltages, amps and watts

Here's a 750W geared hub, using a grade of 7%, using 15A and 25A controllers for comparison. ... https://www.ebikes.ca/tools/simulator.html?motor=MG60_750&batt=B4816_GA&cont=C25&cont_b=C20&motor_b=MG60_750&batt_b=B4816_GA&bopen=true&axis=mph&grade=7&grade_b=7&...
by donn
Sep 10 2020 9:11am
Forum: EBike General Discussion
Topic: Assembling a safe fast ebike
Replies: 58
Views: 3634

Re: Assembling a safe fast ebike

When someone comes out with a low cost solution in a brake handle that has a brake light switch and can modulate a regen brake signal I'd give it a try, but then what to do about the lever for the second mechanical brake? Maybe some kind of trigger type for one finger to pull is the right answer fo...
by donn
Sep 08 2020 9:50am
Forum: EBike General Discussion
Topic: Question about a recumbent trike build
Replies: 13
Views: 697

Re: Question about a recumbent trike build

I see the occasional post from Catrike owners going to an electric motor, on the bentrideronline.com forum, and a lot of the time they go with a crank drive like BBS02 or TDSZ2. That isn't to say that proves anything - they're mighty attracted to the "Copenhagen Wheel", too. I just mention...
by donn
Sep 05 2020 1:47am
Forum: EBike General Discussion
Topic: Assembling a safe fast ebike
Replies: 58
Views: 3634

Re: Assembling a safe fast ebike

You could go with a recumbent e-bike, and that may help, but then there's the visibility issue. So perhaps a better compromise would be to go with a stretched frame - especially one that might lower your riding position a bit. Visibility doesn't need to be a big issue. You should have rear suspensi...
by donn
Aug 31 2020 9:11am
Forum: EBike General Discussion
Topic: What will it take to make ebikes, More mainstream ?
Replies: 173
Views: 16194

Re: What will it take to make ebikes, More mainstream ?

Though to be strictly accurate, that doesn't tell us that they're now mainstream. A change from 1% to 2% is huge for the market, but isn't a huge market.
by donn
Aug 29 2020 9:27am
Forum: EBike General Discussion
Topic: How good are the BikeE recumbent bikes at high power / high speed?
Replies: 54
Views: 4337

Re: How good are the BikeE recumbent bikes at high power / high speed?

-Internally mounted battery to fix the weight distribution/handling Interesting - made the pack yourself, or is there a battery that fits in there, off the shelf? I've never actually seen a BikeE, I assume you have to saw it open to get inside the frame member? This looks like a model with no rear ...
by donn
Aug 28 2020 8:10pm
Forum: EBike General Discussion
Topic: How good are the BikeE recumbent bikes at high power / high speed?
Replies: 54
Views: 4337

Re: How good are the BikeE recumbent bikes at high power / high speed?

Yeah, I wouldn't bother with a mid drive. Regen is a good thing, it's just, that particular hill is in the wrong place to profit from the regen watts, if you generally leave with a full tank. But sure, it's a nice way to take some of the load off your brakes. If you want to get fancy, Grin's control...
by donn
Aug 28 2020 4:40pm
Forum: EBike General Discussion
Topic: Controller / battery question
Replies: 6
Views: 275

Re: Controller / battery question

Well, that's a good question but I don't believe there's a good answer. If you want to limit power to the 1000W rating you were given for the motor, you'd have to configure the controller to stop at 20A. There's probably no need to do that, though. There's rumors about that your average 1000W, 500W,...
by donn
Aug 26 2020 9:33am
Forum: EBike General Discussion
Topic: How good are the BikeE recumbent bikes at high power / high speed?
Replies: 54
Views: 4337

Re: How good are the BikeE recumbent bikes at high power / high speed?

16% is indeed steep, but luckily 1/2 mile is not so long. I see your thought about the hill is framed in terms of regenerative braking, but of course the first concern is whether it will toast the motor. If you plug that into the simulator, https://www.ebikes.ca/tools/simulator.html , you'll see the...
by donn
Aug 24 2020 2:20am
Forum: EBike General Discussion
Topic: How good are the BikeE recumbent bikes at high power / high speed?
Replies: 54
Views: 4337

Re: How good are the BikeE recumbent bikes at high power / high speed?

I live at the top of a long and steep road How long, how steep? If the road is mapped on google maps, you can get a good deal of information about that by getting "directions" from one end to the other, via bicycle. With metric distance, because I think the values expressed in meters may ...
by donn
Aug 23 2020 9:18pm
Forum: EBike General Discussion
Topic: Micro-house ebike build
Replies: 18
Views: 736

Re: Micro-house ebike build

Regarding regenerative breaks - I would consider going geared motors instead if this makes a big difference in being able to get up hills. I understand they're better for that. Though... would it be doable to set up my system with a direct drive 250W set to be optimised for low speeds? If I don't n...
by donn
Aug 23 2020 11:17am
Forum: EBike General Discussion
Topic: Micro-house ebike build
Replies: 18
Views: 736

Re: Micro-house ebike build

I've asked a lot of questions! Sorry for that. That's OK, but they need to be answerable questions, and it's up to you to get them there. Is there enough juice in a 30Ah battery to do all the stuff you want to do? Well, you need to add up those demands in terms of watts. 30 Amp-hours x 48 Volts giv...