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Electric Bike (e-bike) specific issues, including batteries, controllers, chargers, and motors -- as well as the legal or social issues surrounding their use. Not for liquid fuel bike kits.

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0answers
23 views

Why would I use an electric bike?

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 "...
0
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0answers
41 views

Electric bicycle hub geared motor with less drag

Bought a Chinese e-bike conversion kit with a hub motor similar or identical to this one. I was expecting that in terms of drag this would be similar to a free-hub / freewheel with no motor, but ...
0
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1answer
29 views

Freewheel vs cassette geared hub motors serviceability

With ebike conversion kits there appears to be 2 types of rear hub motors: the ones that accept a cassette and a freewheel (see the image below from this aliexpress item) Is the freewheel option more ...
0
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1answer
28 views

Light for Giant Quick e+ 2018

I purchased a 2018 Giant Quick e+ for commuting. Giant uses a modified yamaha PW-X system they have branded "syncdrive pro". The bike is great but the headlight it comes with stinks. I would like ...
2
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3answers
61 views

Cons of using an infrequent use long range e-bike battery trailer using SLAs

So I've recently purchased an ebike and started thinking about how I could go long distances without charging. It occurred to me that whilst sealed lead acid batteries can't go through many cycles, ...
1
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1answer
64 views

Does using a DH fork reduced to 150mm (6") make sense on an ebike?

I recently found out that you can apparently reduce the travel of 8" DH forks such as Fox 40 to 6". This raises the question: would it make sense to do this for ebikes? I like dual-crown forks because ...
2
votes
1answer
56 views

Pedaling overhead with front vs rear hub motor

When pedaling with the motor not working, would a rear geared hub motor give more resistance when accelerating or a front geared hub motor? Given that the the torque from pedaling is applied to the ...
1
vote
1answer
98 views

Electric motor: rear, center or front?

I'm looking for an electric bike. I see motors available on rear, center, and more cheaper, a wheel with a motor to adapt to front. Any experience to help me to make a decision?
2
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1answer
77 views

E-bike rims: can I use them on my touring bike?

I am touring with my MTB, now for 4 months. I have been using really good Pacenti 29er rims, but just 2 days ago I cracked the rear one. I am carrying a lot of weight and Pacenti (after I contacted ...
4
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1answer
265 views

How to extend a chain for a cargo bike?

I have a KMC x10e chain which is 162 links long on my Xtracycle electric cargo bike. The chain is worn and I am trying to replace it. From what I can tell it is available only in 136 links. Is the ...
12
votes
5answers
2k views

Are there reasons not to use always the max level of assistance?

I'm using an electric bicycle to go to work. My goals are: Not to arrive late Not to sweat (too much) My bike, like most e-bikes I guess, let me choose the level of electric assistance that I wish. ...
0
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1answer
72 views

E wheel needs an 8sp free wheel instead of cassette

My new electric wheel requires a free wheel set up. I have an 8 speed Shimano cassette which obviously won’t work. Can I find a free wheel that will be similar to my cassette? I realize I may have to ...
0
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1answer
59 views

My e-bike wiring is damaged and I don't know where to begin [closed]

I was given a bike with an electric rear hub. I'm mechanically inclined but I've never had the opportunity to tinker with one of these. I'm fairly experienced with AC and DC electronics as well. If ...
1
vote
2answers
356 views

Shimano STEPS E8000 battery won't charge

I have a STEPS E8000 bike and wanted to make some improvements, like possibility to charge from any kind of CC/CV charger (even using solar panels when grid is not available) and to charge it to 41v ...
0
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1answer
57 views

Stuck throttle open on specialized turbo electric pedal-assist bike

The throttle is stuck open on my 2016 specialized turbo. How do I adjust or fix? Note there is no throttle switch, and is a torque pedal assist mechanism. (it senses how hard you are pedaling to ...
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1answer
157 views

My impossible quest for the ideal hubmotor, any suggestions?

From what I gather, direct drive motors (DDM) are capable of bigger power. I suppose it's because their heavier nature allows them to withstand higher voltages and currents. They are also very quiet ...
3
votes
1answer
173 views

Any knowledge on LaFree Electric Bicycle?

I have this LaFree Electric Bike, all I really know about it is that it was made by Giant. I am an Electrical Engineering student and I am looking at bringing new life into it, would it be worth ...
3
votes
1answer
84 views

Electric road bike - Compatibility questions

I am building an ebike on a road frame. I am using a Bafang G310 rear hub motor & 8 Speed Shimano cassette. I plan to use a long MTB rear 8 spd derailleur (either Acera or Alivio). For my crankset ...
3
votes
4answers
899 views

My 1000 watt rated hub only pulls 6.7A (321.6 watts @ 48v) suggestions?

I am a big boy (~230lbs) living on a mountain. My 1000 watt electric hub powered by 78 18630 Lion batteries in 13 cells barely moves me level let alone up a hill (which was its intended purpose). I ...
0
votes
2answers
149 views

I keep getting flat tires on my E-bike

I got my first flat a month ago and it was a snakebite flat. I got it by hitting a small bump on the road with low tire pressure. Since then I keep getting flats after a few days of riding. Every ...
2
votes
1answer
181 views

Replacing a cassette with a freewheel

I am building an EBike. The motor manufacturer said I must replace the existing cassette with a freewheel. Why do I need to do this?
2
votes
1answer
120 views

What luggage carrying options exist for an e-bike

I am planning to build a DIY e-bike for my work commute and have the electronics already figured out (which motor, ESC, battery). After work I want to go directly to my other activities. Until now I ...
30
votes
15answers
12k views

Why aren't electric bikes mainstream?

I've lived in different cities in Europe and Australia, and I noticed more and more the creation of bike lanes, and increases in bike commuters. Still, the number of eletric bikes in the streets is ...
1
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1answer
89 views

RPM regulation of direct hub motors

I found this bike push-trailer. Because the trailer project is open-source I discovered that the used hub motor is MUXUS XF40 (specs here) In many places on the internet a learned that if such ...
0
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1answer
93 views

Does anyone know of a lightweight motorcycle style open face helmet for eBiking?

I'm relatively new to eBiking as I had always been able to pedal my bikes until a couple of years ago. One issue I found was the wind chill factor during winter. You can go faster than normal with ...
2
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2answers
164 views

Laws against electric assist bicycle with energy recovery? [closed]

Is an electric bike like this required any special license. The power applied comes from the collected kinetic inertia from going down hill or stored from the rider then the stored power can then be ...
3
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2answers
2k views

Bosch battery stopped charging

It is a Bosch powerpack 500 and the other day it stopped charging. The charger seems to have some output since one of the LEDs on the battery lights up. It is only one LED though and I believe I ...
0
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0answers
78 views

Comparing a cyclist power output on pedelecs and non-electric bikes

I own an Ampler Hawk pedelec, with a pedal torque-sensing motor control system that is partly configurable so that I can limit the power to 250W. I can also vary the assist to anywhere between 0% and ...
4
votes
1answer
1k views

Increasing e-bike battery range by limiting speed

Can I get more range out of my e-bike if I put a speed limit on it? I got my bike a few days ago and I really am enjoying it. As of now I am getting about 35 km per charge. So I was wondering if I am ...
1
vote
1answer
105 views

Can a 26 Inch Controller Drive a 20 Inch Wheel?

My situation: A Bakfiets with a bad controller (hills too much for it I think) Supplier has offered to send me a new controller Supplier has also offered to supply a whole new separate battery - ...
7
votes
1answer
400 views

Why do most E-MTBs have 1x drivetrains?

I'm contemplating about getting an electric assist MTB but as much as I can see all (or at least majority) of e-bikes are equipped with 1x transmission. Is there a reason why there are no e-bikes ...
2
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1answer
125 views

What is this … electrical bike's setup? Is there a particular brand or model name for this? how to replace its battery?

Just bought it from someone, interested to get it fixed. he said it just needs to replace battery, I doubt it (after numerous experience with asking the sellers "what is wrong with the bike" and ends ...
2
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1answer
101 views

YouE planetary motor is having problems how do I pinpoiont the problem?

I was riding then I turned a corner went to turn the throttle suddenly it makes a loud grinding noise and is unable to accelerate. I got the motor open and it can only start turning when I roll the ...
2
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2answers
345 views

Shimano Steps E6000 battery charge percentage falls abruptly

When the battery charge gets to about 20-25% it drops abruptly to 5-10%. The steeper the hill and higher the load drop percentage is higher. Examples: from 25% to 6% steep hill from 13% to 8% small ...
3
votes
2answers
1k views

What is the process of adding a light to a Yamaha PW equipped ebike?

I recently got a bike with a Yamaha PW system. The bike computer has a light on/off button but the bike itself has no light and I want to add one. How do I do this? From what I understand, I need a ...
5
votes
1answer
134 views

E-bike drivetrain demagnetization

I've heard conflicting reports that demagnetizing drivetrain parts to prevent metallic debris sticking is a real thing I'm supposed to care about when servicing e-bikes, but I can't find anything ...
38
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9answers
12k views

Why do the majority of people on an ebike ride at a fairly low cadence?

Around the place where I live the electric bicycle is gaining popularity and it's easy to pick those on such bike from far away not just from posture (rather stiff upper body even on steep hills) but ...
1
vote
1answer
249 views

Retrofitting disc brakes on 2000 Specialized Stumpjumper FSR XC?

I just got an old 2000 Specialized Stumpjumper FSR XC that still uses rim brakes. I also have this 160mm rotor and this mechanical disc brake caliper. Since none of my wheels have 6 bolt holes to ...
1
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1answer
273 views

How do I identify the correct battery for my electric bicycle?

I would like to replace my heavy battery to a lighter one. My current battery lasts for 5 days, if I could replace it with something that can only last for a day, I'm fine with that but lighter. Is ...
5
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3answers
281 views

Experience biking with child trailer during winter?

What's your experience biking with child trailer during winter in the city? I live in Cracow, Poland. Recent winters were almost snow-less, but it's <0°C cold and slippery anyway. I am used to ...
3
votes
2answers
272 views

Should I lubricate a BBS01 clutch?

I am completing the rebuild of a BBS01 electric bike mid-drive motor from Bafung. Would like to lubricate and protect every part properly before reassembly. Should I lubricate the clutch and if so ...
1
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3answers
2k views

Can a road bike stand constant 40km/h for long distances?

I am planning on converting my road bike into an electrical one and I can see that I can get average speeds of 35-40kmh. So I am planning on biking long distances at this average speed. Is it safe to ...
38
votes
5answers
10k views

Why do e-bikes need dedicated tires?

While shopping for new tires on my bike, I saw that some dealers had a specific section for e-bike tires, where the various brands production for e-bikes was present. Why do e-bikes need dedicated ...
8
votes
2answers
1k views

Should I consider buying a velomobile as my daily commute vehicle instead of a bike? [duplicate]

What are the advantages/disadvantages between a (possibly electric) velomobile and a regular bike when in daily use?
4
votes
3answers
2k views

Charging eBike Battery with Solar

I need some advice / info on solar charging an eBike battery. We have two RadRovers from Rad Power Bikes. They are powered with a Panasonic Dolphin 48V, 11.6Ah Lithium-Ion battery https://www....
2
votes
1answer
142 views

Using Nylon vs. Silicone Washer on Bafang BBSHD BBS01 Mid drive E-bike Motor Assembly

Question - Can I replace the silicone washer in the BBS01 axle assembly with a like sized nylon washer? Background - I am rebuilding a Bafang BBSHD BBS01 mid drive e-bike motor assembly. I have ...
2
votes
1answer
166 views

Need help debugging ebike: Laggy motor / inconsistent behavior

My ebike has been acting weird lately, and I need help figuring out why. It's my daily driver, so I'm hesitant to turn it in for service, as that would probably take at least a month. The bike's one ...
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0answers
52 views

Central axis motor or wheel motor for conversion to electric bike? [duplicate]

I'm planning to convert my "mechanical" bike into an E-bike for riding long distances to work, and I would like to buy only the motor kit since I already have the bike. I can see that I have two ...
6
votes
5answers
6k views

Can I use an RC motor to make my bike electric?

I would like to make my ebike to have the minimal look, so adding big hubs or mid drive motors isn't really an option since it also costs more. I found this Keda brushless outrunner 2000w 190KV motor ...
3
votes
3answers
1k views

Can e-bikes speed up my commute? Which class?

I have a daily 15 mile commute (1-way) which takes me approximately 1hr 15 min each way if I bike (taking into account traffic signals and so on). The route is all surface roads, with some mild hills. ...