Endless Sphere

It sounds like you could use portal axles, which will give you gear reduction plus extra ground clearance. Thank you! It is very good idea! A quick search returns with ZF electric portal axle. https://www.youtube.com/watch?v=23-i0niqDP4&ab_channel=ZFGroup 250KW / 22.000 NM! No need that yellow ...

with disc mounts if you must have disc brakes (they don't improve anything except your bike's cleanliness). Not to restart that old argument, but it depends on what you are starting with. Take a spin on an EZIP trails with rim brakes, and you will appreciate disks more. I've dealt with cheap and aw...

Hi everyone. New here and need your help. I have an older (mid 1990s) Dean Titanium Bicycle that weighs about 12 lbs loaded. No, it doesn't. I’m thinking of making it an e bike. Don't do that. You'll only screw up a nice pedal bike, and not enjoy any of its nicer qualities after your convert it. If...

I'm planning to built a 4x4 off road vehicle and I would like to feed all 4 DC hub motors with 50 kw diesel with DC generator. [...] but I need a very low rpm engine since tyres are big and vehicle speed will be limited to 40 mph. It sounds like you could use portal axles, which will give you gear ...

I want to go 15-20 mph for 10 hours. I'm wanting a 150-200 mile range. As others have said... naw. Instead plan on having multiple packs that you can rotate out, running one while others are charging. This is how festival pedicabbers get the endurance you're looking for. You can probably reduce you...

If the pack you have tends to become unbalanced, consider adding one of these: https://www.ebay.com/itm/4S-8S-13S-20S-Lithium-Battery-Active-Equalizer-Protection-Board-Balance-Board/383907966158 This is one example out of many such boards that are available. It will balance the cells whenever an imb...

Yeah, I tend to believe cheap BMSs cause about as many dangers and problems as they solve. I get the rationale for pack sellers trying to idiot-proof their product, but I'd rather move the balancing hardware off the bike and run the proven fast-blow ANN fuse for overcurrent protection. This implies...

My goals are to be able to maintain a steady speed lets say 10-12 mph max . I've had her out on the bike and have no problem getting up to speed on the flats but once I get the motor on is using just throttle to maintain speed practical? Am I going to regret not having pedal assist down the road? I...

https://www.foxla.com/news/rush-limbaugh-conservative-talk-radio-pioneer-dead-at-70 https://ktla.com/news/nationworld/conservative-talk-show-radio-host-rush-limbaugh-dies-at-70/ :cry: I hope he suffered greatly for a long time. He made this country a worse place, and he made it a little better by n...

kubark42 wrote: ↑

Feb 14 2021 12:52pm

And none can get any kind of decent power density at 1000-1500RPM.

That's so very slow for a prop. What gigantic diameter are you working with?

Planning to buy 72V batteries for my 4000W motor from a distributor. The 72V 100A BMS battery description on the website says it’s suitable for motors of between 1000W-6000W. Is that normal for a 100A BMS to be compatible with 1000W-6000W motors? 72V X 100A = 7200W After efficiency losses, that cor...

latecurtis wrote: ↑

Feb 15 2021 8:15pm

I just saw on the news that it will soon be totally illegal to buy 18650 cells online.

Yeah... fat chance of that. This is a country where you can buy designer drugs by the kilogram, online.

When comparing the weight of these different systems, remember to include the weight of ratio reduction and motor/jackshaft mountings together with the aero motor. Also be sure to derate power output in consideration of the fact that the motor won't be driving a propeller or generating very much air...

Cannondale had some rare telescopic forks a while back that used ball bearings in there which probably helped. They used needle roller bearings, rolling on flats machined into the sliders. The two-leg Moto version used the same internal mechanism as the single slider Headshok and Lefty models. The ...

That bike is so generic, it might as well be a kit homebuild. If you regard each of its components as no-name eBay stuff, you'll get on with it fine.

fatty wrote: ↑

Feb 11 2021 4:29pm

No harm in a rear hub motor -- it'll be the cheapest, simplest, easiest.

Easiest, sure.

But I have seen all kinds of frames damaged by inadequate or inadequately tightened torque arms. Paradoxically, in this case it takes more commitment to doing the job right when you do it the easiest way.

For that bike, I'd look at Bafang BBS01 or BBS02 (depending on how much power you want). Those are minimally invasive and don't pose much risk of damage to your frame.

As far as I know, MAC/BMC are the highest power capable geared hub motors out there. eZee is robust, but less so than MAC.

I use one of these to power a chip-on-board LED that I use as a headlight: https://www.ebay.com/itm/124480545093 s-l400.jpg There's a trim pot that can be dialed to regulate output voltage from 4.5V to 30V. If all you want is 1 amp at 5 volts, and you don't need a hardware handshake, this thing shou...

I'm going to try that. I plan to do long-distance touring with this thing, regardless of whether I soon end up homeless or not, so keeping this thing reliable is of utmost importance. It is neither easy to carry nor inexpensive to tow or ship. Recumbents generally are a bear to push for any distanc...

I lost an axle nut today. I have the cassette version and while executing regen, an axle nut on the drive side came loose Yes, that's regenerative braking all right. There's an analogous problem with crank arm bolts on fixed gear bikes. Because torque can be transmitted both ways through a fixed ge...

The voltage drop and power loss (heating) in a wire is a function of the square of the current, the gauge of the wire, and the length of the wire. Many times I've pointed out that the circuit board traces and FET legs of our controllers are many times smaller than the recommended gauge. But, they ar...

If the sprockets don't lie in the same plane, the chain will tend to come off. The best thing you can do is to adjust everything so the sprockets are parallel and in line with each other.

When the thing is used as a cutoff, which is to say not under load, then even a 12V rated switch will do. If you use it to quench a full power runaway condition, maybe it's better to consider it disposable like a fuse.

I have hardwired many wires with no problems at all using zero connectors. Often I'll do it with throttles but I have done it with phase wires leaving enough length to change a tire. Yeah... no. Servicing a bike when the wheel is on a leash, or swapping a busted throttle when it's soldered on, is n...