19
votes
Accepted
Can I use an RC motor to make my bike electric?
Its designed to attach the prop of a model aircraft directly, i.e its designed to drive a fan that cools it. It has little (or none) weather protect, and would be destroyed on a bike in months. ...
- 52.4k
15
votes
Bicycle weight limit (carrying capacity) increase
On a non-folding bike, I'd look at the wheels, and probably replace them with 36 spoke touring wheels and reasonably wide, tough tyres (e.g. 35mm). The tyres absorb some of the shock loads.
However a ...
- 61.3k
13
votes
Accepted
DIY system for charging battery packs from hub dynamo
Decathlon uses a third party part, that is available for sale if you want to fit it on your bike: Cycle2Charge
The category name for this kind of products is "headset cap USB charger" or &...
- 22.8k
10
votes
Accepted
What is this ... electrical bike's setup? Is there a particular brand or model name for this? how to replace its battery?
It looks to be an older Currie Electro Drive, they were originally made in 1996 i believe. I don't know much to anything else about them though other than that is one and they exist.
Here is the ...
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9
votes
Accepted
Bicycle weight limit (carrying capacity) increase
tl;dr: if you want a sturdy folding ebike, you need to have a sturdy folding bike.
Even if the bicycle statically/dinamically can stand more than the declared weight (at your own risk), the (expected)...
- 3,722
8
votes
Can I use an RC motor to make my bike electric?
The important number is not power, but torque. The linked page doesn't say it, but that 2000W is probably achieved at a huge speed (thousands of rpm). To get enough torque to drive the bike (and to ...
- 180
6
votes
Accepted
Ebike brake lever cutoff switch / interrupt switch : How does it work?
In your current set up, the electric brake lever sensor will protect against the situation where you're emergency braking but forgot to release the throttle.
The brake sensors override the throttle ...
- 129k
6
votes
How much human-provided power is needed on an e-bike?
In order to ride at an average speed of 20 mph, especially when riding on the light setting you can't go at 20 mph on uphills. This means you need to go much faster than 20 mph on the flats. Let's say ...
- 20.5k
6
votes
Accepted
Would electric shifting improve Shimano Alfine 8 ebike durability
Electric shifting can only make a difference for the wear attributable to shifting (for example to shift when the cogs are aligned as they should, if the derailleur/hub has the required tech), not on ...
- 22.8k
5
votes
Accepted
What's the power supply for a Saris CycleOps PowerBeam Pro turbo trainer?
This Reddit thread has a response from Saris giving the exact specs:
Good Morning,
Thanks for reaching out to Saris about your trainer.
Though we stopped making our PowerBeam trainers in 2016 and ...
- 5,452
5
votes
DIY system for charging battery packs from hub dynamo
The "Forumslader" (German site) is a semi-commercial semi-DIY dynamo charger. Schematics for older versions are available.
This very detailed article by Olaf Schultz, also in German, ...
- 2,212
4
votes
Can I charge an ebike from another ebike battery?
Here is a video I found which is very detailed and shows how to add a second battery to your bike:
Video: How To Add 2nd Battery to the Fiido D2
Here's the link to the battery which was recommended ...
- 1,379
4
votes
Can I charge an ebike from another ebike battery?
Yes in theory but the gain is not practical. You’re better off swapping batteries than trying to jury rig something.
Let’s do the calculations.
You note that the AC charger puts out 36VDC at 2 ...
- 29.4k
4
votes
Can I use an RC motor to make my bike electric?
This is a supplementary answer. You're concerned about your conversion screaming ebike. I'd like to challenge this premise.
Some of the new geared hub motors are small enough to hide behind rear ...
- 29.4k
4
votes
Can I use an RC motor to make my bike electric?
These RC motors are made to be used on much smaller and lighter objects than a bike+human combo. So even if it delivers 2k W, it will most likely just surge and either overheat, break its inner ...
- 301
4
votes
Accepted
Do gear train cogs exist (for driving a cog from a motor)?
These cogs are very unlikely to exist. A proper gear-to-gear transmission uses an "involute" tooth profile, which is shaped so that the gears maintain a constant relative rate of rotation. A side ...
- 1,624
3
votes
DIY system for charging battery packs from hub dynamo
Most Dynamos are 6V, 3W output, you would need to know the specs for yours.
Amazon/Aliexpress etc have heaps of 6-24V input to USB output devices for a couple of dollars. You can also get a 0.9-5V ...
- 52.4k
3
votes
Bicycle weight limit (carrying capacity) increase
My main concerns would be spokes in the short term; but wheels can easily be exchanged.
The second and graver concern is the frame. When I was riding about 100km per week, including some cobblestone ...
- 1,747
3
votes
Dual electric/pedal bikes to solve pedalling effort issues
Not sure if I understand your question correctly, but I take it you want to ride unassisted during training/recreational rides?
I don’t have much experience with electric bicycles but as far as I’m ...
- 28.8k
3
votes
Can I use an RC motor to make my bike electric?
I did this.
It is not impossible and very fun, some electronics skills required.
Derate the motor: if the maker says "10Kw @ 100V" you know that the max admitted Amperes are 100. Cut that down to 40-...
- 31
2
votes
Why did the manufacturer fit a usb port on my e-bike battery when it is not connected?
It doesn't fully answer the question but I've found a (replacement?) battery online that seems to be compatible to the Viking Gravity based on its product description:
Compatible with ebike type ...
- 4,556
2
votes
Can I charge an ebike from another ebike battery?
My apologies if I have misunderstood the question, but connecting the output of a secondary battery to the charge input of the primary would not work "in the field" most, if not all such batteries ...
- 223
2
votes
Can I charge an ebike from another ebike battery?
Hmmmm...
IMO if you get a schematic drawing for the bike you should be able to purchase a 2nd battery and find a method to connect that battery in parallel to the original.
Having a second battery ...
- 1,379
2
votes
Ebike brake lever cutoff switch / interrupt switch : How does it work?
It is just possible to use a Normally Closed (NC) Single Pole Double Pole (SPDT) relay to open/cut the motor current/voltage when the handbrake lever switch is applied (i.e., when the handbrake lever ...
2
votes
Accepted
"Right" way to store energy from 2 dynamo hubs
This is going to be difficult. I assume you have a tadpole or delta and you're trying to drive the dynamos off the paired wheels - and not the single (drive) wheel.
Problem 1: Single-Sided Hubs
The ...
- 29.4k
2
votes
How much human-provided power is needed on an e-bike?
Cycling power is frequently measured is in watts.
To know how much power the rider needs to contribute to a 20 mph speed over 50 miles you need to know:
How much power is needed to sustain 20 miles ...
- 23k
2
votes
How much human-provided power is needed on an e-bike?
Depends on how much the “light assist” setting actually assists.
To ride 32km/h (20mph) on flat terrain with a road bike in road bike clothes you need about 170W to 210W. With a city-bike or mountain-...
- 28.8k
2
votes
Would electric shifting improve Shimano Alfine 8 ebike durability
It could be just fine, since the purpose of e-bikes is to reduce the torque needed to be generated by the cyclist. I find that on a road bike with no electric assist, I tend to sprint in an aggressive ...
- 20.5k
1
vote
Controller for eBike AVENTON PACE 250
I can try to help you here. I don't know what you think the errors shown mean (perhaps you should have added the message meaning and why it led you to think the controller is at fault): I'm not going ...
- 15.3k
Only top scored, non community-wiki answers of a minimum length are eligible