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Generally, I don't think autonomous humanoid robots have all that many industrial roles. Cheaper, more reliable robots are here already, copying humans in a robot form is just technological hubris. Regardless, another steeper technological wave is about to engulf us humans (unless humanity...

Oh wow! Impressive manufacturing capability there in China. Now I want a Bafang mid-drive MTB.

That's where one would use their two range extenders.

Yesterday I was looking at this ebike: Luna Fixed Stealth Ebike . Not really fixed as it has a 3 spd. geared hub, but something close to what the OP was thinking about.

On an older ebike the original battery would be, or should be, toast anyway. The buyer's opportunity is finding a bike with a dead battery that the owner has given up on (and hopefully stored in a dry location.) Just need to find those garages where they sit.

I already have my ebike museum piece, a pristine 2009 Giant Twist Freedom. The ride experience is phenomenal, like you don't even know it's motorized. Was about $2,200 new. Couldn't sell that thing new in the US for a quarter of that today -- too much bicycle, not enough motorcycle. If I wanted...

I was referring to numerous news articles about issues with some of Rad's batteries. Those articles ran for an extended news cycle and would tend to "terrify" the less informed, with the result of turning potential buyers away from Rad. This, along with Rad's other issues, would tend to lower...

Should be some good deals on (used) Rad bikes, it being winter, Rad is underwater, and everybody is terrified of them. How much?

My scale of bad brakes goes back to cheap side pull calipers on steel rims. About as bad as the disc brakes on that Hyper mid-drive I bought this summer. Quality rim brakes work very well, so do cable and hydraulic disc brakes. All depends on the components and setup. As far as the cable pull...

Can't help you with the seat. Not a bicycle seat. I was going to add a layer of closed cell foam on top of my emoto's seat. That thing is so uncomfortable it's hard to sit on for any length of time, but fortunately, the bike has a limited range. So my time of pain is short.

There is something to be said for simplicity, and a cable pull hydraulic caliper seems to add complexity where, from my experience, it isn't needed. A decent cable pull caliper can work well. Though at $22 a pair those calipers the OP linked are tempting--if they work well. I use Shimano M375...

Ah, you're doing better than me on the training. I don't have any disabilities, outside of being old and broken. Ride to live, live to ride!

Yeah, seems to be, but what is the bot trying to sell?

That's odd. Are those spring forks, or air? Can you make a warranty claim? Or buy a replacement from them? The most challenging thing in fork replacement is spec'ing a replacement that fits, then it would be cutting the steerer tube to length. A front motor complicates the process. A lot of if...

We always called that model G automobile wrench a Ford wrench. One came in the model T Ford toolkit, or so I was told. In my opinion, they are a must have tool when working on a steamship.

Aventon has maybe found a profitable market segment. With luck this bike will tic the boxes for many buyers, and they will make some money. Which seems to be a rarity nowadays for ebike companies.

I do maybe about 2k miles annually. I live in a small city and I'm 99% on two wheels for mechanized transportation. Most directions are soon water. As I ride several different ebikes, and not all of them have odometers, my actual mileage is an unknown.

I would say an electric quadracycle would need some sort of permit to operate on the road to be "legal" in most states. Be it a NEV or personal mobility vehicle or something. That said, an old guy riding one at ebike legal speed would probably be overlooked.

Here's the Park Tool video on servicing disc brake pads: https://www.parktool.com/en-us/blog/repair-help/disc-brake-pad-removal-installation .

At 4 wheels you are no longer considered an electric bicycle as trikes are.