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by dogman dan
Feb 13 2019 7:40am
Forum: E-Bike Technical
Topic: Best geared hub motor for slow climbing
Replies: 13
Views: 862

Re: Best geared hub motor for slow climbing

Best geared hub motor for slow climbing would be one in a 10 inch wheel. supposing you can find one in a mag wheel that small. Overload a geared motor, of ANY wind, ( 300 total pounds weight or more) and ride it slow up 7% grade, and you will smoke that motor down in about 3 miles. It CAN do short c...
by dogman dan
Feb 13 2019 7:36am
Forum: E-Bike General Discussion
Topic: What is this motor?
Replies: 10
Views: 312

Re: What is this motor?

Not one I recognize. But after all, there are about 10,000 hub motor factories in china.
by dogman dan
Feb 13 2019 7:21am
Forum: E-Bike General Discussion
Topic: Looking for guidance building a bike for commuting
Replies: 14
Views: 374

Re: Looking for guidance building a bike for commuting

You are on the right track in general. E bike commute can be a money saver, but if you are still licensed, a smaller motorcycle can be much cheaper per mile. I personally made e bike commuting pay, getting rid of $20,000 in charge card debt, by avoiding replacing the car for four years. Barely drivi...
by dogman dan
Feb 13 2019 6:54am
Forum: E-Bike General Discussion
Topic: small front hub motor with disc brakes can I use rear motor?
Replies: 10
Views: 199

Re: small front hub motor with disc brakes can I use rear motor?

As AW said, measure that front fork. Many fat tire bikes have the same front fork width as a regular bike rear. 135 mm Yours might be that size, or it could be 100mm standard front, or it could be something non standard. If its not 135 or 100 mm, you will be limited to changing the front fork. ( to ...
by dogman dan
Feb 07 2019 8:36am
Forum: E-Bike Technical
Topic: what do i need ? a better controller ?
Replies: 12
Views: 281

Re: what do i need ? a better controller ?

Buy a controller if it makes you happy, but I still think your battery is squealing like a pig. Find out how much sag you have before you buy a controller. You can parallel another same voltage battery to stiffen it up, if sag is your problem now. If you are buying more battery first, then you buy t...
by dogman dan
Feb 07 2019 8:30am
Forum: E-Bike General Discussion
Topic: VOTE: Coil or Air Spring for Front Fork on Road Bike (MTB)
Replies: 9
Views: 306

Re: VOTE: Coil or Air Spring for Front Fork on Road Bike (MTB)

Well, you never said you wanted super plush ride. Just not too harsh. IMO, not too harsh you get with a zoom pogo stick from a dumpster bike. For sure, the air shock is easier to experiment with, finding the perfect ride. I just said spring, since you can still adjust rebound on them easy, and they ...
by dogman dan
Feb 06 2019 7:53am
Forum: E-Bike General Discussion
Topic: Modifying a DD hub motor.
Replies: 21
Views: 548

Re: Modifying a DD hub motor.

To melt one, just overload it with weight. 300 pound dude, or a trailer, and ride up a steep hill. But a 200 pound guy + bike motor battery that weighs 100 pounds or less, will make it up long hills up to 10% grades without overheating. Most highway and state roads are 8% or less. City streets, and ...
by dogman dan
Feb 06 2019 7:46am
Forum: E-Bike General Discussion
Topic: See a lot of inexpensive brushless hub motors nowadays (hallomotor etc) are these any good?
Replies: 23
Views: 830

Re: See a lot of inexpensive brushless hub motors nowadays (hallomotor etc) are these any good?

Skimming the thread again. :oops: By the time I wrote, I was thinking the WE brushless kit.

He's going to love the new rig compared to those weak old brushed motors.
by dogman dan
Feb 05 2019 7:59am
Forum: E-Bike Technical
Topic: what do i need ? a better controller ?
Replies: 12
Views: 281

Re: what do i need ? a better controller ?

My best guess is your battery is getting killed by your controller already. A slow death, but its squealing like a pig I bet. Get a real voltmeter display of some kind. If your battery voltage sags 8 volts or more when you take off from the stop sign, your motor and controller are killing the batter...
by dogman dan
Feb 05 2019 7:44am
Forum: E-Bike Technical
Topic: E-BikeKit.com Front Hub Motor Bearing Replacement?
Replies: 4
Views: 139

Re: E-BikeKit.com Front Hub Motor Bearing Replacement?

A good mechanics machine shop would be able to pull out the old bearing and press in the new in ten min. Worth the cost, if one is nearby. A local bearing shop, or the internet, can also supply the right bearing to replace on your other motor. Odd your new bearings are failing, Ive put many many tho...
by dogman dan
Feb 05 2019 7:24am
Forum: E-Bike General Discussion
Topic: volting up and gearing down
Replies: 7
Views: 266

Re: volting up and gearing down

It would help a LOT, to know what motor you are talking about. But assuming you mean a typical cheap hubmotor with 28 mm stator, then go ahead and run it in 20" wheel. It helps, but its not really all that much less gear. Not enough to make it turn too fast with your adult weight loading it down. It...
by dogman dan
Feb 05 2019 7:15am
Forum: E-Bike General Discussion
Topic: Modifying a DD hub motor.
Replies: 21
Views: 548

Re: Modifying a DD hub motor.

Most likely you have a 27 or 28 mm stator. If you don't have 35 mm or more from spoke flange to spoke flange, then its the typical, 500w rated dd motor commonly called 9 continent type, but cheaper laminations as said above. Still, the cheapo motor is not a terrible, inefficient motor at all. They r...
by dogman dan
Feb 05 2019 7:04am
Forum: E-Bike General Discussion
Topic: See a lot of inexpensive brushless hub motors nowadays (hallomotor etc) are these any good?
Replies: 23
Views: 830

Re: See a lot of inexpensive brushless hub motors nowadays (hallomotor etc) are these any good?

Ok hardest problem first. Matching a controller to the motor. Get the right controller and it will save you a lot of trouble. The right controller will have self learning, or self study wires. Often these controllers will have one color of big power wires. When you hook up the controller, match up c...
by dogman dan
Feb 05 2019 6:36am
Forum: General Discussion
Topic: Have you been in the presence of a famous person?
Replies: 20
Views: 494

Re: Have you been in the presence of a famous person?

My most famous person encounter was Tanya Tucker. In a very crowded bar, I had to rub against her ass to get another beer. But though I touched her ass, I never met her dammit. Went skinny dipping with Keith Carradine once at midnight, but that was more a thrill for the waitresses than for the male ...
by dogman dan
Feb 03 2019 9:12am
Forum: E-Bike Technical
Topic: Old Ebike, New Hub wont fit
Replies: 4
Views: 173

Re: Old Ebike, New Hub wont fit

unfortunately, your e bike frame is not standard bike width, 135 mm. But your new motor is. It needs a special d shape hole spacer washer to get the cogs to clear, or maybe a narrower freewheel. single speed might be the easier option to find. In any case, you might have to spread that frame too far...
by dogman dan
Feb 03 2019 9:05am
Forum: E-Bike Technical
Topic: Motor controller and battery output
Replies: 6
Views: 161

Re: Motor controller and battery output

First off, you may be confusing amps, and amp hours. But for sure, the bigger your battery in amp hours, the less amps each cell has to put out, to supply your controller with 20 amps of current flowing. In addition, your pack may have a bms which limits amps to 40, or 60, or whatever, in case you h...
by dogman dan
Feb 03 2019 8:57am
Forum: E-Bike General Discussion
Topic: VOTE: Coil or Air Spring for Front Fork on Road Bike (MTB)
Replies: 9
Views: 306

Re: VOTE: Coil or Air Spring for Front Fork on Road Bike (MTB)

Air for the win, when riding up a rock staircase on a desert singletrack. But for the road, the coil will be a lot longer lasting, imo. No need to get into shock pumps to keep riding for one. In fact, for road you might not need much more than the cheapo pogo stick fork, unless you are loading up, c...
by dogman dan
Jan 27 2019 9:06am
Forum: E-Bike Technical
Topic: Motor controller not pulling rated amps
Replies: 18
Views: 491

Re: Motor controller not pulling rated amps

Yeah, many possibilities. The first and most likely, is you bought a controller locked to 30 amps. ( the shunt in it) But it sells faster if they say its 45. 8) :lol: You know the deal, you sent money, they send you what they have. One way to fix it if it is that, is a tiny blob on the shunt. look u...
by dogman dan
Jan 27 2019 9:01am
Forum: E-Bike General Discussion
Topic: What engine for super73 style bike
Replies: 6
Views: 226

Re: What engine for super73 style bike

Sounds to me like you need two hub motors, if you do go that way.

Sand plus weight, sounds like a 30 min meltdown to me.
by dogman dan
Jan 27 2019 8:54am
Forum: Battery Technology
Topic: Is better to charge the battery only to 80%?
Replies: 31
Views: 1331

Re: Is better to charge the battery only to 80%?

For cooking monkey, yes, wait a bit for the battery to stabilize after your take it off the charger. half an hour should be plenty. Two reasons it will drop voltage some. 1 as your battery ages, full is a lower and lower voltage. Brand new perfect full cell is 4.2v, and will stay there. But,,,, betc...
by dogman dan
Jan 27 2019 8:36am
Forum: Battery Technology
Topic: Is better to charge the battery only to 80%?
Replies: 31
Views: 1331

Re: Is better to charge the battery only to 80%?

What most likely happened to BG, is that the bms runs on the first two cells. So 24-7, just a tiny bit, its discharging two of your 13 cells more than the others. If you don't charge to 100%, the bms never fully charges those two cells, and eventually they are not charging to 80%, but 50, then 40, a...
by dogman dan
Jan 25 2019 8:24am
Forum: E-Bike Technical
Topic: automatic assist level based on slope. Anyone do this?
Replies: 8
Views: 263

Re: automatic assist level based on slope. Anyone do this?

Sounds like it would be great, if my right hand didn't already do it better. Learning to properly ride with a half grip throttle is priceless. But many do fail to get used to it, particularly if they did not ride motorcycles in the past. The trick is to pay attention to the pedal pressure, and adjus...
by dogman dan
Jan 25 2019 8:15am
Forum: E-Bike General Discussion
Topic: Torque arm thick enough ?
Replies: 10
Views: 366

Re: Torque arm thick enough ?

Its plenty, though still open. But if your nut does somehow loosen, and the axle starts to lever itself out of the notch, at that point it might start bending. You absolutely positively will need a spacer washer that perfectly fits that gap between TA and dropout. Tighten it without one, and you wil...
by dogman dan
Jan 25 2019 8:08am
Forum: E-Bike General Discussion
Topic: My first massive controller with these connectors
Replies: 9
Views: 394

Re: My first massive controller with these connectors

Surely you can get a crimping tool, on e bay if nothing else. Here in the USA they are in every hardware store. The affordable ones look like this, and can crimp a wide variety of terminals, up to about 8 gage. wire crimper.jpg For joining two or more wires, in the house electrical section of the ha...
by dogman dan
Jan 23 2019 8:05am
Forum: E-Bike Technical
Topic: I broke a bolt in my hub motor. How do I get it out?
Replies: 14
Views: 413

Re: I broke a bolt in my hub motor. How do I get it out?

I'd just ignore it unless you get two of them next to each other. But drill and use and easy out will work.