Search found 35377 matches

by dogman dan
Apr 12 2021 5:31am
Forum: EBike General Discussion
Topic: Help and Recommendation for next Project
Replies: 3
Views: 136

Re: Help and Recommendation for next Project

Yes, but since the dropout is vertical, chances of the number of links on your chain resulting in perfect chain tensioning in any given gear is about zero. You will need a tensioner of some kind. Could be a derailleur locked into position, or whatever. One option is a rear lengthening attachment, al...
by dogman dan
Apr 12 2021 5:27am
Forum: EBike General Discussion
Topic: Tempted to lick my 50 volt battery
Replies: 44
Views: 708

Re: Tempted to lick my 50 volt battery

Just the kind of discussion that got me so hooked on ES 12 years ago. Having been stupid enough to experience KFF a few times with lipos, I definitely would have no interest in KFT.
by dogman dan
Apr 12 2021 5:18am
Forum: EBike General Discussion
Topic: Upgrading controller and battery advice
Replies: 6
Views: 130

Re: Upgrading controller and battery advice

The main issue with hitting your current motor with more power is going to be its load. If you try to haul more than 200 pounds total weight of bike, rider, cargo, battery, up too steep of hills, your motor may fry. It lacks the size of magnets, and the amount of copper in the winding to handle a lo...
by dogman dan
Apr 12 2021 5:07am
Forum: EBike General Discussion
Topic: Speedometers over 100kph/60mph
Replies: 5
Views: 135

Re: Speedometers over 100kph/60mph

You could try entering the wheel size doubled. Then 30 mph displayed would mean 60 mph. Not sure if that will work, but it might.
by dogman dan
Apr 10 2021 5:41am
Forum: EBike General Discussion
Topic: Belt + 3-speed IGH + Seattle Hills = TSDZ2, BBS02, BBSHD, or mistake?
Replies: 3
Views: 216

Re: Belt + 3-speed IGH + Seattle Hills = TSDZ2, BBS02, BBSHD, or mistake?

Pretty much the only easy way to do what you want here, is to put a front hub motor on the bike. I'm not familiar with Seattle, but I've climbed hills 10 miles long that averaged 8% grade with pretty ordinary 1000w hub motors. (48v) The other way you could do a mid drive is to put a motor on the bik...
by dogman dan
Apr 04 2021 6:30am
Forum: EBike General Discussion
Topic: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.
Replies: 12
Views: 278

Re: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.

There you go, it was just the wrong design for use with a motor. Lots of em out there with different, more compatible design. I have in the past, had to put a spacer washer under a freewheel to use the last cog on the freewheel. The chain and derailleur just hitting the allen head bolts on the motor...
by dogman dan
Apr 04 2021 6:30am
Forum: EBike General Discussion
Topic: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.
Replies: 12
Views: 278

Re: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.

There you go, it was just the wrong design for use with a motor. Lots of em out there with different, more compatible design. I have in the past, had to put a spacer washer under a freewheel to use the last cog on the freewheel. The chain and derailleur just hitting the allen head bolts on the motor...
by dogman dan
Apr 04 2021 6:22am
Forum: EBike General Discussion
Topic: What about electrifying a StreetStrider? Pros and cons?
Replies: 7
Views: 323

Re: What about electrifying a StreetStrider? Pros and cons?

Tilting trike, looks like it needs a motor to get to the top of a hill, for the carving turn run down it.
by dogman dan
Apr 03 2021 6:13am
Forum: EBike General Discussion
Topic: DIY handlebar shim ideas? Using 22.2mm Moto-x bars (same diameter as BMX) in my 31.8mm stem
Replies: 12
Views: 197

Re: DIY handlebar shim ideas? Using 22.2mm Moto-x bars (same diameter as BMX) in my 31.8mm stem

All you need is some scrap aluminum or steel sheet that is fairly thick, like 1 mm or so. That may be a bit of a scrounge to find, if you can't find what you need at the first couple bike shops. Might be sheet the right thickness in a hardware store, but more likely too thick there, 1/8 stuff. Consi...
by dogman dan
Apr 03 2021 6:01am
Forum: EBike General Discussion
Topic: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.
Replies: 12
Views: 278

Re: Rear derailleur cable attachment lever arm hits hub motor gears 3-6 on six speed freewheel.

Different design derailleur would fix it. I never saw that one before here. Good pictures! Really helps us when they are so good. Though you might use that low gear occasionally, you may be overthinking it a bit how good your shifter needs to be. What you will tend to do is leave it in one gear, or ...
by dogman dan
Apr 02 2021 6:23am
Forum: EBike General Discussion
Topic: Enduro/Bomber controller box
Replies: 1
Views: 129

Re: Enduro/Bomber controller box

For me the solution always seemed pretty obvious, small homemade rear fender, then mount the controller on top of it. Essentially, a seat post rack with the controller on top of it. I always loathed the idea of mounting that controller in the front wheels splash zone, and I live in a place where the...
by dogman dan
Apr 02 2021 6:21am
Forum: EBike General Discussion
Topic: Where to find brushed hub motors nowadays?
Replies: 12
Views: 385

Re: Where to find brushed hub motors nowadays?

That seemed to be his main problem, finding old hoverboards to scavenge. But on ali express there were similar brushless hub motors with controller that seemed pretty cheap. But likely not as cheap as junk hoverboards. At 50 a pop, looking at 200 bucks to make another car. Then he can race em agains...
by dogman dan
Mar 31 2021 11:01am
Forum: EBike General Discussion
Topic: Where to find brushed hub motors nowadays?
Replies: 12
Views: 385

Re: Where to find brushed hub motors nowadays?

I do agree, for the seller brushed may be better. Cheaper, easier to sell more if cheaper. On the consumer end, less efficient, and more likely to overheat. Fine for screw guns, never burned out one of those. I burn out saws, and weedwhackers pretty regular. I consider those expendables, like drill ...
by dogman dan
Mar 30 2021 7:09am
Forum: EBike General Discussion
Topic: Where to find brushed hub motors nowadays?
Replies: 12
Views: 385

Re: Where to find brushed hub motors nowadays?

https://www.aliexpress.com/item/32911644784.html?spm=a2g0o.productlist.0.0.1420567bWD6LvK&algo_pvid=5beec05e-7c78-41ff-ac2f-ac6b6cf94274&algo_expid=5beec05e-7c78-41ff-ac2f-ac6b6cf94274-8&btsid=0bb0623b16171058181587484e924e&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ A ...
by dogman dan
Mar 29 2021 6:47am
Forum: EBike General Discussion
Topic: Questions on a 8000w 72v ebike kit was
Replies: 9
Views: 417

Re: Questions on a 8000w 72v ebike kit was

Dogs are getting real old now. They run about half the yard, then check up and go ouch. I got more healthy, and started riding scooters for my higher speed riding thrills. Finally strong enough for a really long ride. Today, since my last battery died, I am back to pedaling a bike every day to keep ...
by dogman dan
Mar 29 2021 6:28am
Forum: EBike General Discussion
Topic: 36v or 72v first build advice
Replies: 2
Views: 186

Re: 36v or 72v first build advice

Also, 36v does not limit you to 500w. The typical "bike" hub motors are rated at 500w. The ones with internal planetary reduction gears tend to do best if kept below 1500w, with the typical off the shelf 36v kit set at around 750 watts, with the controller doing the limiting. That's one of...
by dogman dan
Mar 28 2021 7:53am
Forum: EBike Technical
Topic: Upgrade Cargo bike Babboe
Replies: 5
Views: 227

Re: Upgrade Cargo bike Babboe

Well, lots of more powerful rear hub motors out there. But they will need the new more powerful controller to run it. Which will murder your smaller battery quickly. The only really good news is that your bike can carry a bigger battery, much bigger than you will need for a modest increase in power,...
by dogman dan
Mar 28 2021 7:43am
Forum: EBike Technical
Topic: 3 phase wire combination
Replies: 8
Views: 225

Re: 3 phase wire combination

My understanding of it is pretty primitive, i was an ag major not E engineer. But if your motor runs forward but vibrates, its real likely that you have it running on two of the phases, with the third fighting it. This overheats the controller. wrong combo may run forward, but not too smooth, or wit...
by dogman dan
Mar 28 2021 7:35am
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 16
Views: 844

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

Yes, I stopped riding my semi recumbent, but could have rode it more with even a primitive rear shock. Re the mac or similar motors overheating. I did a lot of testing on motor overheating for E bikekit.com. Jason had no interest in selling more powerful kits that are typically legal in the USA. So ...
by dogman dan
Mar 28 2021 7:24am
Forum: EBike General Discussion
Topic: Questions on a 8000w 72v ebike kit was
Replies: 9
Views: 417

Re: Questions on a 8000w 72v ebike kit was

Part of what I was asking. Rephrased, is this for a 1/4 mile ride, or a street ride? Yeah, gonna need to parallel a lot of those batteries to go far at 70 mph. Nothing inherently wrong with running a bike on drill batteries, or mower batteries, but at 70 mph, you do drain em fast. This vanishing ran...
by dogman dan
Mar 26 2021 5:54am
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 16
Views: 844

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

I have thought for years now, that it would be great if pedicabs and other heavy cargo bikes could mount a simple hub motor with the 5-1 planetary gearing, but the magnet size and weight of copper of a big clyte direct drive. The way to go for now, John in CR showed us quite some time ago. Big power...
by dogman dan
Mar 26 2021 5:44am
Forum: EBike General Discussion
Topic: Questions on a 8000w 72v ebike kit was
Replies: 9
Views: 417

Re: Questions on a 8000w 72v ebike kit was

Riding this on the streets?
by dogman dan
Mar 26 2021 5:40am
Forum: EBike General Discussion
Topic: Does more wattage gives more initial torque or only more speed
Replies: 17
Views: 626

Re: Does more wattage gives more initial torque or only more speed

Ok, its not a race bike. Sounded like it might be. We could discuss shit infinitely here, and have for over a decade. But to answer your question it would help to know what you want. What kind of bike will it be? Is this a cargo hauling truck? Is this an MTB for trail riding? Do you need to have hug...
by dogman dan
Mar 24 2021 6:44am
Forum: EBike General Discussion
Topic: Does more wattage gives more initial torque or only more speed
Replies: 17
Views: 626

Re: Does more wattage gives more initial toque or only more speed

One of the reasons I started making my bikes 8-16 inches longer. If he wants a drag bike, he should lengthen it. Another consideration about initial torque, is whether the wheel would just break traction. I still think 5000w is plenty for the first three feet off the line in street use. One thing I ...
by dogman dan
Mar 22 2021 5:18am
Forum: EBike General Discussion
Topic: Does more wattage gives more initial torque or only more speed
Replies: 17
Views: 626

Re: Does more wattage gives more initial toque or only more speed

The one time I got to ride a 10,000 w e bike it wanted to backflip pretty bad. Once you got going it was fun, but it was tricky to start it up from a stop. But it depends on what you plan to do with it, if it needs wheelie bars to win the drag race, put em on. If you just need to get ahead of a floc...