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I've heard people say that there is no automation system for making ebike packs. To assemble a 48v Shark type pack might take hours of spot welding. This machine does one side in a minute or two. The theory would be it would lower the price of packs and allow custom builds where a buyer could...

Honestly, if you start here: https://electricbikereview.com/category/affordable/ and look at the pictures and the prices, you'll have a manageable pile of bikes. I think there are ten pages in the filter. Then you can read the reviews, maybe run Google searches. Court, the owner of the site...

Real hills and off-road hills require a mid-drive. For everything else, hubs generally suffice. Most DIY vendors are looking for the higher margin products. The simple reality is that the Chinese make maybe 20 million motors a year for the home market. Most are simple hubs. They don't show up...

It's a great overview of how power relates to slopes and wind, and you include the all important rider input as a given. You could say that a mid-drive can be geared for most hills, of course. There's a lot of nuanced information in this sheet. Basically, winds are the killer. Most people...

I think when you get the ebike, even the most basic version of it, completed, a few hundred miles of riding will clarify things. Things interact, and some things are just the way they are, the way the parts work. Some motors have internal controllers, which spares you grief and bulk. The Golden...

Bike thieves are little pukes... https://www.theguardian.com/lifeandstyle/2016/oct/21/bike-lock-developed-that-makes-thieves-immediately-vomit

Harry, I think we've both tried to advise people who went with lead acid batteries. It's not a great way to go and the long term cost is high. A 20 cell pack with the latest GA cells would be much better. You need a high volume, low margin segment of ebikes. But the best cells can be used...

I've used LiPo packs from Hobby King. You just get the cells in a pack with a power lead and balance leads. The only problem is that they are Lipos, which is probably the least safe chemistry. I ran across a company, Titan, that is making packs with the Panasonic (Sanyo) GA cells. I've seen...

Nice! I don't know enough to dream about doing that. You said something about a problem with a battery pack? Seems like there are BMS issues out there. Hope you got it resolved. Given the shipping problems, not what I want to hear. Hope you get this bike done for the that great New England...

@RoyL Wow, that is an amazing video and a bike that everyone should think about for a few moments. I don't think I've seen anything that defines better why electric will win. And it's only $40k! Wow!

Those batteries are OK. I've used several of them. It used to be an off brand, but now it is just a fairly low cost sealed battery. But you can't push these batteries very hard if you want them to last. Trying to get 1000 watts, the motor rating, is not a good idea and it probably isn't going to...

I would definitely recommend a step-through frame, unless your demographic will not include people over 50. You need less than a 500 watt motor, probably a hub. A lot would depend on how cost effective you wanted your initial cost and maintenance to be. If you were not too concerned, you...

The numbers kind of grab me. State of the art in the US consumer market is an Eneloop AA cell, which is 1.2V and 2.0 AH. So 2.4 watt hours. The GA cell is 3.7v and 3.5 AH or 13 watt hours. The 18650 is larger, but in the ball park for a 'small cell'. Looking at this earlier in the day. Getting...

Thanks. I like the idea of pre-welded cells a lot. I (Link Removed - No Longer Exists)for an early spring project if I could run down some information. I have the Luna Mini pack with the 30Q cells. It's a great size and 3+ lbs, but the 52 volt isn't ideal. I can carry two small packs easily...

I noticed that among the Deals of the Day on Amazon is a lightning deal for the standard ebike cells (found in packs), the 18650. The price is not that great. The brand is unknown to me. Buried in the copy they mention SANYO NCR18650GA, but they don't say these are that battery, exactly. They...

During the interview Court had with the Tern Rep, they briefly mentioned a Bafang drive Tern for around $2000. What (Tern) said was they wanted to have a bike with some of the features but at a more mainstream price. I think the Elektron looks great, but it's too much. If the BBS version was...

Those are very elegant connectors. I've never run across them except on a controller and coming out of the motor. I mostly use the standard crimps which come in insulated and even in shrink wrap. I don't love crimp connections. The good thing about heat sinks is that you can pretty much touch...

You could have two problems. I don’t know what is involved in fixing the speed sensor issue, but like you say the throttle isn’t working either. It sounds like the voltage is dropping when the battery is hooked up, but the battery is at 54 volts when it is not hooked up. It could be a battery...

https://endless-sphere.com/forums/viewtopic.php?f=28&t=65281 Error 21 discussion... Speed sensor. You get a total fail. How many amps drawn with just the battery connected?

“Whoever thinks that the ebike community is going to be satisfied with 250W, 500W or even 1000W ebike laws is dreaming. As long as the sun keeps rising, there’s going to be guys out there who will push the limits until they inadvertently find out what those limits are. By the same token we would...