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Questions tagged [electric-bike]

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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1answer
43 views

Bike kit needs battery , need help choosing a battery and confused by specs

I have a 48v 1000 Watt rear hub kit, with a multifunction LCD display. Voltage:dc48v,Current:28A Booster1:1,speed set 1:1-42v/dual mode, brakes : low level. Now I'm unsure what battery to get. Can ...
0
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4answers
820 views

What to expect from an e-bike service?

My e-bike manufacturer recommends a service every 1000km. Tomorrow I'll bring my bike to the shop where I bought it for the first service. I already had a mini-service for free at around 300 km in ...
3
votes
1answer
118 views

How often should I charge my (lithium) e-bike battery?

I had a retrofitted e-bike running a Leed e-bike kit for 4 years. After 800 charge cycles the battery was toast. However this system is quite basic with both the battery management & charger. I ...
3
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4answers
230 views

How to commute by (electric) bike in excessive heat

I am from India and this is beginning of summer. I rented an electric bicycle for daily commute during winter but now it is difficult to do during summer screeching heat. What should I do to continue ...
1
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1answer
63 views

Ebike battery - volts and wattage

Will a 36V 500W ebike with a 36V 17.5Ah battery go farther and faster than a 36V 250W ebike with a 36V 10Ah battery, or will I give up something by doubling that wattage?
2
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1answer
85 views

Brake weirdness on my new E-bike

I very recently purchased an E-bike for commuting to work and other area locales. I understand with any new bicycle there will be some break-in time and after a few rides I did notice the brakes were ...
4
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5answers
2k views

Could the E-bike drivetrain wear down till needing replacement after 400 km?

The drivetrain (chain? gears?) of my E-bike started to make loud clicking sounds, with the impression that the chain is skipping over teeth. The gear switching itself still works well. I have tried ...
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0answers
36 views

Measure capacity of Lithium by Coulomb counter method while charging [migrated]

I'm learning to design a module to measure capacity (percent left) of ebike Lithium battery. Lithium cell ' specifications are 48V-13Ah, it's built from cell pin 18650- 2600mAh. I choose the Coulomb ...
2
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1answer
79 views

Rickshaw electric conversion

Is it possible to buy a traditional pedal rickshaw and stick an electric bike conversion kit on it? The rickshaw I've seen is the type when the rider is at the rear and so has two wheels at the front ...
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2answers
65 views

Lifespan chain and gear wheels on e-bike [closed]

If is possible to give an indication of the average lifespan of the chain and gear wheels of an E-bike? Assuming: Cycling in all weather conditions (commute); Western European climate (10% of time ...
2
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2answers
96 views

Ancheer electric mountain bike cuts out under load

My year-old 250W Ancheer electric mountain bike currently has an issue. When going up hills, the motor is put under a lot of load and the battery turns off. It remains off until reset by toggling the ...
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2answers
41 views

24V eBike Battery

I have an 2003 Merida PC550 24v ebike which uses two 12v 9ah batteries. Is there a converter available to use one large 12v battery to get the same output? I know that I can use two 12v batteries in ...
7
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3answers
587 views

Understanding e-bike power/torque

In the UK e-bikes are currently limited to a maximum of 250W assistance if you wish to use them on public roads. However, it seems that the motors do vary in terms of the available torque - from ...
0
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1answer
82 views

Bosch 400Wh battery first led only is flashing and refuses to charge [duplicate]

On a long trip with a lot of wind my 400Wh battery went empty.When i tried to charge it at home it refuses to charge. The first of the five leds is flashing. Strange because in the manual is written 1,...
-6
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1answer
85 views

What are all the ways in which E-Bikes can make MTB areas worse? [closed]

I want to pre-emptively say I am asking this as a devil's advocate. So, now that that's out of the way - Let's see if we can list all of the reasons given for why E-Bikes should be banned from ...
2
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1answer
65 views

Can I install/convert a Giant Quick-e+ 2019 to use an Alfine 11 speed IGH?

I have a Giant Quick-e+ 2019 and would like to install either a Alfine 11 speed di2 IGH. My first question is, is it compatible? I've been looking at the measurements and it seems all ok. But when I ...
1
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1answer
87 views

Levels of derailleurs, freewheels and chains

What are the levels of derailleurs (Shimano probably) I know Altus and Acera but don't know the higher end ones. I am putting this on my Sondors Fat ebike. I will be using a 7 speed freewheel, and a ...
4
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2answers
150 views

How much is average annual maintenance of a mid-range electric bike?

I'm considering buying a mid range e-bike for commuting (3 miles one way, all city road/bike lane). it's about £1000 to buy the bike, but how much is it to service the bike? I don't need an exact ...
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0answers
37 views

Front hub motor for fat bike?

Suppose I want a fat e-bike with front hub motor. What are my options? Are there special motor hubs? Or you can somehow use "normal" motor hubs?
0
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1answer
79 views

Is throttle-only possible for mid-drive?

Suppose I want an electric bike with throttle. Is mid-drive (crank based) even an option? I got impression that mid-drive means pedal assist only (PAS).
3
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0answers
63 views

Getting ride data from Bosch CX System

Recently got a Cube eMTB with Bosch CX system installed. Love the bike, does well for commutes and some bush bashing over the weekend. Being a nerd, I like my data. Considering the system already ...
2
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2answers
137 views

Is there such a thing as 'eBike specific' freewheel?

I've recently had the LBS replace the freewheel on my eBike after 500 ish miles of riding. The sprockets were not worn out, instead the freewheel bearing (not the hub bearing) had become loose. It ...
7
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4answers
344 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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1answer
103 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 ...
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1answer
243 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
73 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, ...
2
votes
2answers
136 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
129 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
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1answer
119 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
votes
1answer
86 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
votes
1answer
333 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
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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. ...
-1
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1answer
77 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 ...
-1
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1answer
63 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
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2answers
1k 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
79 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 ...
-1
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1answer
172 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
2answers
374 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
102 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
1k 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
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2answers
253 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
309 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?
3
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1answer
133 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
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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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2answers
150 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
135 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
192 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 ...
4
votes
2answers
4k 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 ...
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
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1answer
153 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 - ...