Endless Sphere

I like that idea as well, though with that small wheel diameter, I'm not sure you need a geared hub. But I also notice that the bike shown has a drum front brake. Can the bike be ordered with a sidepull front brake instead? If so, I'd do that. If not, make sure that you can mount a caliper brake of ...

The safest speeds for a E-Bike are dependent on the Frame and Components used, That ignores traffic conditions. All you have to do is look at the latest 8 or so years of Down Hill Bike Design and the brakes they use. It is that easy. So you can go the speeds ( legal speeds ) that a Motorcycle can g...

The accident rates and damage have more to do with the driver's skill, experience and care than the vehicle. That's an oversimplification. You have to actually be doing the right things if the goal is to be safer. And that's the problem with the notion that on a two wheeled vehicle, keeping up with...

Those motorcycle statistics are badly distorted by idiot riders, and that's whether they're riding like asses or simply riding in an insufficiently alert and defensive manner. ... And you somehow don't think that there are similar rates of idiotic behavior among cyclists? The University of British ...

Well, I don’t know about USA, but here we have more cyclists death per mile traveled, than motorcyclists. Cyclists have much more frequent accidents especially, and in 72% of the cases it is a collision with a car. Cycling in the city here, is a survival exercise. Do you have actual stats for Montr...

The issue being discussed wasn't and isn't how good or bad cars are. The issue is how safe it is to operate a two wheeled non-enclosed vehicle at traffic speeds as opposed to operating at bicycle-like speeds. It seems pretty clear that operating at traffic speeds is a LOT more likely to result in d...

flat tire wrote: ↑

Oct 14, 2018 9:57 pm

As luke said the lines are imaginary. Many ebikes could qualify for more than one category.

Many of the lines aren't imaginary at all. They are written into law. Now whether those laws get enforced or not is a whole 'nuther thing.

...on a per mile basis bicycles are somewhere between three and ten times as likely to result in a death than cars. Obviously, your stats are not taking into account all the lives taken by cars, by their sole existance, manufacturing, pollution and disposal. The usage of personnal cars had taxed a ...

liveforphysics wrote: ↑

Oct 14, 2018 3:33 pm

If cars don't pass you, or pass you less, your number of car death dice rolls reduces drastically.

The death statistics don't seem to bear this theory out. I think you have drastically oversimplified what is really happening.

... The laws aren't designed for their exceptional performance and tolerating their rare exception is no great burden on traffic or society. But if you suddenly have many thousands riding at those speeds, the complexion of things changes. As long as street usage have speed limits, the performance o...

Wouldn't a 1000 Watt BBSHD apply the same kind of pressure on the dropouts? Just coming from the chain instead? No. The force is applied from the chain and to the rear cluster. The cluster transfers the force to the hub, spokes and rim. That assembly spins on bearings that ride on the axle. You can...

With 1000 watts and an aluminum rear dropout, I think most people would recommend using at least one steel torque arm. I use two on my aluminum 1000 watt bike. The motor axle is only about 14mm in diameter. Given that small radius, the amount of torque applied to the dropouts can be quite high. And ...

dustNbone wrote: ↑

Oct 13, 2018 12:29 am

I've made a habit of not depending on hearing things for my safety, there's way too many near silent dangers on the road.

I don't depend on sound, but I'm happy to let it help me when it can. I've purchased a set of bluetooth headphones that I will give a try. I'll probably just use one ear.

My controller sits underneath my rear rack and I have a fender over the rear tire. Even when riding on very wet roads the controller stays pretty dry. Of course, I don't have to ride in the wet often. So that helps. Today looks like a possible exception.

If you've ever watched a bicycle road race on TV and looked at the miles per hour that those guys are going then you know a man powered bicycle is very capable of high speeds. Sure. But how often does that occur among the general population while commuting or riding for sport? Almost never. My obse...

Bikes are vehicles just like any other. Some cars are low performance, some are racing machines, they are all regulated by the same street speed limitations. Telling the smaller he has to be slower, is to make sure the bigger can run him over? At a certain low level of maximum performance, they are...

Centrifuge? Let it sit overnight then spin the crap out of it. :^) Or maybe work differently and add the resin drop by drop, kneading it like dough? Also, I wonder what happens if you used the neodymium magnets but inverted the cup and let the resin drain out over some extended period of time - perh...

Now I just have to convince the boss wife... I turn on location sharing on Google maps for my wife on the way home. I also text her when I'm leaving. That seems to make her less uncomfortable about the commute. Odd that she seems less concerned about my ride in to work. But the main thing, of cours...

I wonder if you could get a bit higher iron density by putting a bunch of neodymium magnets on the bottom of the cup. That should help out gravity a bit. It might even help you drain off the low iron resin.

Note: That is, underneath the cup, not in the bottom along with the resin.

From what I've read of Justin's testing, the main thing you want to do is used thick enough metal. Use 1/4" steel and you'll be fine. I used 1/4" mild steel for both convenience (can get it at any hardware store) and because I'd rather not have a harder steel possibly deform the threads on my motor ...

For those of you who blast tunes while riding how much power is adequate and at what speed? I want to do 45+ while bathed in sound so was thinking around 500 watts with a 6" sub. I'm trying to imagine where riding like this might be reasonable. My conclusion is that it might make sense on your own ...

Sounds like your motor has reached the point where no amount of amps added will increase its speed. If so, then I think that your only two options for that motor/wheel combo are to increase the voltage, or use a motor controller that enables field weakening.

I use two plastic, waterproof, foam lined "equipment" cases. They were being sold as pistol cases at Frys Electronics. These particular cases are probably a bit small for your battery, but these things are available in many sizes. I use a small nut and bolt and a small "nusiance" padlock to keep the...

Rare and expensive? Really? I think I paid around $20 for mine. 12 volt switches are pretty common given that they are the standard for automobiles. You can even buy multi-function switches that mount to handlbars. They are usually made for motorcycles. I'd guess the lack of open source in this are...

I find it hard to use powerful 12V headlights, as you'll have to buy rare and expensive DC-DC. So I have 24s lithum battery and 8-100V headlights and 48-100V horn. There are three control channels onboard which can commutate 12 to nearly-150 Volts exactly for this puprose. Rare and expensive? Reall...