Recent content by flyingpants

Luckily I covered this topic in the first post. Overhead should be eliminated or minimized, at least for the very cheapest options. For that price, I don't expect any warranty or "customer service", really. I don't need to ride at 30mph. Pedal assist is good enough. The battery thing is...

A few years back, the Currie eZip sold for $500 on Amazon, or as low as $350. It's since been discontinued. The Sondors was meant to be a $500 ebike. The Sondors Thin with the front suspension is now $1039 USD. Almost all online ebikes are in the 1500-2000 range or even higher. It's worth...

http://emmo.ca/emmo-zone-motorcycle-style-ebike/ This new ebike is seriously amazing, looks exactly like a motorcycle. Bike itself is $2899 plus tax. To replace the battery, 5.3kWh of Tesla cells costs about $1375 USD, enough to make two huge 72v37Ah packs to give you all-day range, even at...

So... It's been over 3 years, where is the larger 48v 30Ah version? This could replace almost every motor including BBSHD. Gear for better efficiency and longer range - climbing at 7mph, cruising at 20mph. You could achieve the ebike dream - comfortably using only one gear (44/14) for both...

Eventually, both. Yeah I have tools, I am friends with machinists and engineers.. and I have a ton of free time :)

$200 for a motor and controller doesn't sound that crazy to me. Small battery for pedal assist Downhill: no motor power required Flat: very little motor power required Uphill: lots of motor power definitely required, in the best case it just flies up the hill by itself and you can assist...

I have the money for a Bafang mid-drive or whatever, but that's not my goal. I'm trying to build a 35lbs hybrid super-commuter that can go up any hill, with no derailleurs at all (if desired). Transmissions are outdated, IMO. And I want the hill-climbing to be as efficient as possible. I live...

Sounds great, except I'd probably still want the chain reduction for lower speed & better climb. I'm heavy, the bike is heavy, hills are steep, the battery is small. How much does this motor weigh?

Ok, so forget the RC motors for now. It's either hub+currie, or hub+crazy bolted hub. I prefer the former, but I doubt the currie can handle the 900+ watts I want for uphill. Then it's just a question of hooking up one throttle to both controllers and praying for the best! Will do some more...

What is the weight of the motor? Hubs are inefficient uphill which means heat and wasted energy. Direct drive = cogging. I'm aiming at low power usage here, the bike will almost always be used in pedal-assist mode except for a hill.

You're right, the rear motor will be a fixed gear ratio. But it doesn't matter, because it will be a guaranteed 8km/h up any hill. If I understand correctly, if I max the throttle, it will even do 8km/h on a flat plane. No harm in that, at all. The mid-drive is too heavy, expensive and I don't...

I had the idea of using a 1-2lbs RC motor for the pedal assist, and a slightly heavier, 4-5lbs 850W peak hub motor bolted on for the hill-climb feature (would also work as a starter motor). But I'm not sure saving 1-2lbs is worth trying to use an RC motor all the time. Maybe an in-wheel hub...

Hi there. Like the title says, I'm looking to design a bike that can climb any hill. The Bafang BBS series is great, but expensive, and I like my front gears. Also, I'm always scared the chain will not shift properly, or get caught on my shoelace or something. So, no mid-drive! A hub motor is...

Great work.. I've seen it in person, it's a monster :O

I don't believe that Crystalyte is street-legal in Ontario. Where did you get 36 watts per mile? I have read as low as 10 watts per mile, I'm a bit heavy but that shouldn't increase my power consumption by 3x. My friend consistently gets 53 miles from 72v20Ah, only 27Wh/mile and that's with...