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Do external motors really produce more torque using less electricity? If so, how? If the issue is sub-optimal RPM in hub motors, then why would moving the motor outside the hub help with that? I am l …

We bought a Cannondale Kinneto 2013 for my girlfriend and I also mounted a tuning kit that removes the 25km/h limit. I hope you aren't planning to use that illegal tuned bike on public roads. There …

I live in an extremely flat city that lies about 15m above sea level. One has to drive an hour or two to reach even rolling hills. Several decades ago, I rode quite a bit, and accumulated a decent "s …

Is it true that this is a unisex bike? Every bike is a unisex bike. I think you'll find that most high quality bikes have a diamond frame whether used by a male or a female. The reason is that dia …

Just curious if it sounds crazy to use a PEDAL ASSIST E-Bike to make a trip across Japan...somewhere like 260KMs total I find that on road e-bikes with around 500 watt-hour battery, and best low rol …

The main reason why electric bikes aren't mainstream is the fact that human legs and electric motors want to produce power at much different RPMs. Casual cyclists pedal at around 60 RPM. Experienced …

This is a stupid idea for many reasons. Bicycles need at least 100 watts to go at any reasonable speed, but on hills you will crash due to lack of speed if you don't have 500 watts. 100 watts of panel …

I'd divide bikes into several classes: Ready-made mid-drive electric bikes Ready-made hub-drive electric bikes + maybe a ready-made mid-drive electric bike with a mid-drive system that uses a standar …

A human produces 100-300 W (100 W is trivial even when exhausted, 300 W can be produced only up intermediate-length hills). Unless you want the bicycle to be unstable up hills, you want the full 300 W …

The answer by Criggie excellently explains that the motor doesn't add any pedaling resistance. I find the claim true especially on by Bosch Active Line Plus system -- I have never observed any pedalin …

Me, only 15 NM? I am not sure. I am sure about my torque. If I stand on the forwardmost pedal, it's 110 kg weight. If I pull up from the rear pedal with 25 kg weight (clipless pedals) and push down …

Most likely it will be safe. In most cases, lithium ion batteries contain a safety circuit that controls the charging. The charger in this case will be a constant voltage current limited charger. I as …

There are several reasons for regenerative brakes not being common on bicycles unlike in electric cars: Electric bicycles have very poor acceleration, and the rider produces about half of the acceler …

Few electric bicycles have regenerative braking. Most quality e-bikes seem to be settling on mid-drive, which even makes regenerative braking impossible because there is a freewheel between the wheel …

Unfortunately, standardization is extremely poor. Because only mid-drives can provide good controllability (since practically no hub drive has a torque sensor), you want to choose mid-drive if you act …