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by dogman dan
Jul 31 2021 7:16am
Forum: EBike General Discussion
Topic: Hybrid road bike ebike conversion
Replies: 21
Views: 323

Re: Hybrid road bike ebike conversion

Nothing wrong with front wheel conversions for what he plans to do. But yes, rear wheel conversions work particularly good on 7, 14, and 21 speed bikes. It will work good with an 18 speed too. Gets a bit different when you have 24 or 27 speeds, because the typical 7 gear rear freewheel that comes wi...
by dogman dan
Jul 26 2021 5:25am
Forum: EBike General Discussion
Topic: New build: looking for setup without an LCD display required
Replies: 11
Views: 254

Re: New build: looking for setup without an LCD display required

Not the waterproof controller on that kit, and the cheap display not worth having. Maybe it will work without it?

But its got the good wiring harness. Thats a definite plus. And the display could be upgraded.
by dogman dan
Jul 25 2021 5:43am
Forum: EBike General Discussion
Topic: Strategies to increase range while on road (you can't use a gas station)
Replies: 39
Views: 951

Re: Strategies to increase range while on road (you can't use a gas station)

Yeah, ride slower, pump up those tires, use 300w but pedal up 100w of it. A more aero bike would be best of course, but to max your range on what you have ride 15 mph. Its quite astonishing how much more wind resistance there is at 20 mph, vs 15 mph. And simple stuff, like don't ride with a big wint...
by dogman dan
Jul 25 2021 5:23am
Forum: EBike General Discussion
Topic: Does anyone make "small" 52v batteries?
Replies: 20
Views: 401

Re: Does anyone make "small" 52v batteries?

Makes you wonder if that great looking little pack is even legal to be shipped in the US. I charged my battery where you would not start a fire. I thought the bms made it safe. My dangerous lipos got charged in my fireplace. But I thought it was safe to charge the bms equipped 18650 packs in the gar...
by dogman dan
Jul 25 2021 5:10am
Forum: EBike General Discussion
Topic: New build: looking for setup without an LCD display required
Replies: 11
Views: 254

Re: New build: looking for setup without an LCD display required

Its going to look a LOT like an electric bike. Period. You can hide batteries in panniers, and motors behind panniers if you want stealth. But guys who will mess with your bike will mess with an ordinary bike. Don't go into the store when low lifes that are up all night stealing are awake. Shop in t...
by dogman dan
Jul 25 2021 5:08am
Forum: EBike General Discussion
Topic: Help a noob, which would you choose???
Replies: 4
Views: 160

Re: Help a noob, which would you choose???

Yeah, 48v will be plenty, for somebody who pedals and runs a mid drive.

In the end, you will buy what will definitely fit, AND is actually in stock. Still a ton of stuff you can get one day, then not the next. Covid.
by dogman dan
Jul 24 2021 4:58am
Forum: EBike General Discussion
Topic: Does anyone make "small" 52v batteries?
Replies: 20
Views: 401

Re: Does anyone make "small" 52v batteries?

Needing high power from small ah batteries is what made a lot of us run RC lipo batteries ten years ago. You can get 40 amps from a 5 ah size. Its still a viable solution, but one requiring much more care from the user, because of the fire hazard, and the risk of ruining batteries over charging, or ...
by dogman dan
Jul 24 2021 4:51am
Forum: EBike General Discussion
Topic: New build: looking for setup without an LCD display required
Replies: 11
Views: 254

Re: New build: looking for setup without an LCD display required

https://www.amazon.com/EBIKELING-1200W-Direct-Waterproof-Electric/dp/B08BBKC6F7/ref=sr_1_3?crid=NM15JFW7IAP2&dchild=1&keywords=electric+bike+kit+20+inch+rear+wheel&qid=1627119869&sprefix=electric+bike+kit+20+inch+%2Caps%2C245&sr=8-3 This one from what is on Amazon looks like the ...
by dogman dan
Jul 24 2021 4:36am
Forum: EBike General Discussion
Topic: how fast does 1600 watts get you on a mountainbike?
Replies: 13
Views: 343

Re: how fast does 1600 watts get you on a mountainbike?

Thats why I keep saying he should at some point, go ahead and put as much as 3000w for 40 mph into that motor, because then he can have a 1600w (measured at the battery output) cruise speed. And the motor should not fry too quick, pulling 1600w on flat ground. But up much hill, that trailer may caus...
by dogman dan
Jul 23 2021 6:37am
Forum: EBike General Discussion
Topic: Help Id this bike - 24v ebike
Replies: 11
Views: 229

Re: Help Id this bike - 24v ebike

Yeah, almost certain that the motor is brushless. But with china, nothing is certain. Could be the product sourced motors made in 2001.
by dogman dan
Jul 23 2021 6:31am
Forum: EBike General Discussion
Topic: ok folks here is the hybrid ebike.
Replies: 21
Views: 582

Re: ok folks here is the hybrid ebike.

Agree. Don't want to discourage him, other than thinking doing what he wants makes it legal. He reads the law one way, the cop another, and the judge another. Its how the system works. To work that system best, pedal like hell and don't get that ticket. And know it, if some cop hates you. Re the 300...
by dogman dan
Jul 23 2021 6:21am
Forum: EBike General Discussion
Topic: is torque a good predictor of how easy it will feel to go uphill?
Replies: 7
Views: 485

Re: is torque a good predictor of how easy it will feel to go uphill?

Again, though it was many years ago, and the first or second year the shimano mid drive system came out, when I demo'ed one at interbike, I was really impressed with the shimano and bosch setups. Didn't like some of the other mid drives as much, but the software for the PAS on the shimano was sweet....
by dogman dan
Jul 23 2021 6:14am
Forum: EBike General Discussion
Topic: how fast does 1600 watts get you on a mountainbike?
Replies: 13
Views: 343

Re: how fast does 1600 watts get you on a mountainbike?

Depends on how much weight is on that trailer. On a regular commuter type bike, upright seating position, with a rider that weighs less than 200 pounds, on flat ground, without a big wind, 1600w can get you to about 35 mph. Depending on the voltage, the winding of the motor, and the size of the moto...
by dogman dan
Jul 23 2021 6:03am
Forum: EBike General Discussion
Topic: Specialized Stumpjumper conversion recommendations
Replies: 71
Views: 1087

Re: Specialized Stumpjumper conversion recommendations

I have a specialized FSR that also had the frame that could not carry a battery in the triangle, as well as an older Y frame giant. The option is pretty much, to carry the battery on a rear rack, but minimize the weight. It can help a lot to add a strut to the seatpost rack, bracing it back to the b...
by dogman dan
Jul 22 2021 5:33am
Forum: EBike General Discussion
Topic: ok folks here is the hybrid ebike.
Replies: 21
Views: 582

Re: ok folks here is the hybrid ebike.

Yeah, wattage for 35 mph pulling a 75 pound trailer will be about 3000w. 2000 will do for a relatively lighter bike with just a very large battery aboard. Your motor will do 3000w for short periods of duration, so do go for 72v 40 amps if you feel like it. But again 48 or 52v 40 amps for 2000w is of...
by dogman dan
Jul 21 2021 4:35am
Forum: EBike General Discussion
Topic: ok folks here is the hybrid ebike.
Replies: 21
Views: 582

Re: ok folks here is the hybrid ebike.

DC at higher voltages sparks a lot, welding the switch into the closed position. Looked to me like it was on the AC side? I did not say your trailer was unstable at 30 mph. I meant that you may be surprised how it handles at 40 mph. When your bike frame starts flexing like a wet noodle, it makes you...
by dogman dan
Jul 21 2021 4:14am
Forum: EBike General Discussion
Topic: Help Id this bike - 24v ebike
Replies: 11
Views: 229

Re: Help Id this bike - 24v ebike

24v could be early enough to be brushed motor. If only two wires go to the motor, definitely brushed. But some brushed motors did have 4 wires, two fat ones and two skinny ones to a thermistor switch. As for branding, its china. Not a Heinzmann motor, not a Lee Iacoca bike. Lots of those were around...
by dogman dan
Jul 20 2021 5:04am
Forum: EBike General Discussion
Topic: Are fans needed to cool down battery packs?
Replies: 9
Views: 272

Re: Are fans needed to cool down battery packs?

Sounds like you got a normal, real world battery situation. Nothing is getting hotter than normal. Do try to park in the shade when it must sit there all day. If you must, prop a piece of cardboard or whatever to keep direct sun off the pack. Every bit helps some. But your battery must live in the r...
by dogman dan
Jul 20 2021 4:57am
Forum: EBike General Discussion
Topic: RIP AussieJester
Replies: 9
Views: 482

Re: RIP AussieJester

Aww man. I'm so sorry to hear that. He was such an inspiration to me when I first got on ES. A true genius, and not about to let any physical limitations stop him.
by dogman dan
Jul 20 2021 4:54am
Forum: EBike General Discussion
Topic: ok folks here is the hybrid ebike.
Replies: 21
Views: 582

Re: ok folks here is the hybrid ebike.

So what state are you in? That a 40 mph home made motorcycle with pedals is legal? Not that cops in many states give a shit. In general, the recipe for 40 mph from that type motor is 72v 40 amps controller. 3000w. So you will not be doing 40 mph for all that long on your battery, even with 1800w max...
by dogman dan
Jul 18 2021 4:11am
Forum: EBike General Discussion
Topic: float charging lifepo4
Replies: 19
Views: 294

Re: float charging lifepo4

Interesting that 49cc gassers are illegal where he is. Only reason I did not type "get a motorcycle or scooter" is that he did not want to go very fast. But yeah, you want to have long range a lot, to carry that heavy generator around. I tried the same thing, but found that just buying two...
by dogman dan
Jul 17 2021 6:09am
Forum: EBike General Discussion
Topic: Are fans needed to cool down battery packs?
Replies: 9
Views: 272

Re: Are fans needed to cool down battery packs?

No need for fans. HUGE need for a better or at least larger battery if you are heating them up that much. If you are, your rate of discharge is hammering the battery into dogshit. Whats too hot for lipo? when you can't touch them because the shrink is melting. Quite warm to the touch is ok, though t...
by dogman dan
Jul 17 2021 6:06am
Forum: EBike General Discussion
Topic: Challenges of Securing Products
Replies: 5
Views: 151

Re: Challenges of Securing Products

Things aint back to normal yet, much as you'd like them to be.
by dogman dan
Jul 17 2021 5:55am
Forum: EBike General Discussion
Topic: float charging lifepo4
Replies: 19
Views: 294

Re: float charging lifepo4

Use a regular charger and bms to balance charge the batteries once back home, periodically. They need this, but if your pattern of use is gentle enough, they may only need it a few times a year. To keep the lifespan, simply discharge back to your voltage choice asap after you balance the batteries. ...
by dogman dan
Jul 17 2021 5:49am
Forum: EBike General Discussion
Topic: Does this look safe?
Replies: 24
Views: 447

Re: Does this look safe?

Just mount it so it stays dry, but in a little box so the heat sink can breathe. Or maybe just tuck it under the seat.