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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86 views

Considering purchasing a slightly used Hollandia Evado e-bike… couple minor questions

I am on the verge of purchasing a Hollandia evado e-bike. It would be for me, a male, though the previous owner was a female. From what I could learn myself, the "step through" design is ...
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55 views

Rear seat for kids electric bike above battery

I have a bicycle as in the picture. Are there any child seats that can be fixed in the rear of this bicycle? ANy suggestion is appreciated.
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1answer
78 views

Will magnetic pedals interfere with ebike batteries or motors?

I am wondering if magnetic pedals would induce current in mid-drive ebike motors or batteries. I am assuming for theoretical purposes, they would, because all oscillating magnetic fields induce a ...
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51 views

What ebike conversion kit would fit on this bike [closed]

Don't really know how to use this forum but that's the picture,is there any way I could still keep my shimano gear shifter and brakes as these are together but somehow add anything so It can just ride ...
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1answer
83 views

Which electrical freight bicycle would you recommend? [closed]

I am looking for a bicycle to make my car redundant for weekly groceries. A typical Saturday trip would be to the department store(5 km) then to my parents for delivery (20 km) then to another shop (...
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3answers
1k views

EBikes - is torque a good predictor of how easy it will feel to go uphill?

Electric bikes sometimes quote the torque or max torque of the motor being used. So for instance this bike has a Shimano Steps E8000 motor the torque of which is given as 70 Nm (confusingly enough the ...
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1answer
161 views

What type of tyre is is the most shock absorbing, between MTB or Hybrid)

I want to setup my bike to the most shock-absorbing configuration possible. Rear and front suspensions are set to "soft", will look for a shock absorbing saddle, but how about tires? My bike ...
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4answers
729 views

Narrow or comfort saddle?

I have just purchased an e-bike that came with a wide "comfort saddle". I am used to riding a hybrid with a narrow saddle, and that seat was very comfortable on long trips. Should I replace ...
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37 views

Can I use my Chariot (now Thule) child carrier hitch on my Juiced Crosscurrent S?

I recently bought a used Chariot Cougar 1 child bike trailer / carrier from Craigslist. This same trailer design is now under the brand "Thule." It works great, and the included hitch fits ...
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3answers
91 views

Riese Muller with Bosch performance CX not engaging immediately

since the firmware in my ebike engine Bosch performance CX gen 4 has been updated, I am noticing a strange beahviour, that is, when pedalling, the engine (or the rear wheel pawns) will not engage ...
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200 views

Ebike throttle not working

Hi members friend got a dohiker ebike off ebay got it went for a ride came home and everything was fine... plugged it in to charge and then just stopped working pedal assist works and walking mode ...
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1answer
82 views

20 inch ebike wheel motor exchange

Hi members eres something that I would like to know. .. I have a viking gravity 20 inch ebike wheel motor. If I exchanged/refitted this motor into say a 29inch wheel with all the same parts/kit ...
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1answer
117 views

Replacing an ebike's cable disc brakes with hydraulic disc

I have a Viking Gravity 250w 24v ebike. I'm just wondering if I can replace the braking system with a hydraulic type and what would happen to the wired braking safety feature? Would I have to retrace ...
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1answer
97 views

Fit a throttle to a pedal assist.bike?

Can I fit a throttle to a pedal assist Viking Gravity ebike? If yes what is needed other than a throttle? Thanks
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82 views

Why fit a usb on my ebike battery when not even connected

Id like to ask if anyone else has a viking gravity ebike with a internal frame battery pack which has a usb port included. Thing is i found out that it wasn't working even though its a brand new ...
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1answer
218 views

Why do my handle bars wobble from side to side?

I am a gramma with my first electric bike. When I ride I notice my handlebars and wheel tend to flip from side to side a lot. Is this because I am out of practice riding or does something need ...
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2k views

How to make a 10 year old electric bike battery work better?

I have taken a 10 year old electric bike out of the garage a few weeks ago after not having used it for multiple years. The bike is an elops 7 bought at decathlon with a geonaute battery. It still ...
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1answer
170 views

Best solution for additional (dual) battery for E-bike

I've marked a few possible places for additional battery mount. What do you think is the most reliable place to mount battery in terms of ergonomics of the bike? Also, how to ensure the parts are ...
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1answer
429 views

Where is the Shimano e-tube project light connection setting?

I'm trying to install some aftermarket hardwired lights to my eBike which is running a Shimano steps e5000 drive system (bike is a Reid urban+ ebike). I've verified that the lights work and are the ...
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1answer
41 views

Eranger Montana Ladies E-Bike

Bike now 4 years old and battery not holding charge like when first purchased. Been n touch with Eranger cannot help said bike no longer being produced so now left with a £1100 bike and cannot buy a ...
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1answer
173 views

Looking for a waterproof electrical bicycle, is there such thing as ip68 for electrical bicycle?

I'm currently trying to find a bicycle brand that produces electrical bicycle with ip68/ip67 waterproof. Currently I could find any, google is not helping with my search and when I find something ...
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3answers
556 views

E-bike tyres on normal bike

I am shopping for tyres for my normal MTB. As I am mostly riding city, some gravel and light offroad I wanted something with good speed on road and some traction offroad. I found Schwalbe E-bike tyres ...
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1answer
152 views

What type of ebike motor would work best for a 13” tire?

I want to drive a yard cart with a motor / battery. The cart has 13” wheels and weighs ~200 pounds loaded. I want to walk behind it, so I’ll need to be able to control the speed between 1-3 mph. ...
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2answers
262 views

Wind (nano-/pico-)turbines installed on bicycles for regenerative charging of batteries?

What is the smallest wind turbine available on the market that has been installed on a bicycle? and what about R&D or even conceptual wind turbine? This question is a follow up to question why are ...
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1answer
982 views

What does error code 30 signal on a Bafang electric unit?

A year or so back I bought an electric cargo bike online. The company I bought it from is since then no longer in operation. Since a few weeks every now and then the display shows a wrench symbol and ...
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6answers
8k views

Why are regenerative brakes uncommon on e-bikes?

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 ...
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1answer
473 views

How to replace hub motor cable in e-bike?

The hub motor wires are cut from near the axle and looks like I can't repair it without completely replacing it. The motor is similar to this one on Ali Express. I failed to open the motor because ...
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1answer
108 views

Ebike going up a hill controller and motor gets hot causing a circuit break

Motor: satellite down gearing, 350 watts, rated @36 volts. Pack: 40.2 volt 10 series by 7 parallel. Lately the last 3 times I go up steep hill the battery wires, controller, and motor are hot to the ...
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1answer
213 views

Hybrid e bike suspension or no suspension

I am 64 and just taken up cycling again after a very long lay off. I ride purely for leisure and a mix of tarmac, canal tow paths and old railway tracks. Having looked at a number of e bikes i am ...
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1answer
57 views

What tyres will fit this ebike rim? [duplicate]

Out of an impulse buy - I now have a complete ebike kit with battery. Originally I wanted this to be put on a mountain bike but upon seeing how little the rim is - I don't think any mountain bike ...
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1answer
107 views

Gear ratio formula to work out driven gear

I have been looking for a formula for two days now to calculate the diameter and how many teeth my driven gear needs. The driver gear is 14 teeth and RPM will be 7104 (Motor KV x Batt Voltage). This ...
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0answers
245 views

Bosch eBike wiring diagram, where to find?

My RieseMüllerPackster80 refused to start today. I guess there is a bad connection somewhere but as all I could do was plugging the battery and computer in and out, I am not wiser whether cabling has ...
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2answers
147 views

Run from solar panel without batteries?

Is it possible to use solar panel(/s) as primary power for an electric bike, HPV or light velomobile (without batteries, mandatory assisted mode only) ? Are there any limitations or obstacles ? ...
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3answers
161 views

Any tuned E-bike with good support at high cadence high speed?

We bought a Cannondale Kinneto 2013 for my girlfriend and I also mounted a tuning kit that removes the 25km/h limit. I am a well trained cyclist and the goal would be to "accelerate" my ...
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40 views

Broke Spokes backwheel e bike [duplicate]

Four spokes on backwheel of Riverside 500 ebike just snapped when I was going uphill. Anyone else had this problem or know why it could have happened?
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3answers
377 views

Best setup for long distance?

I’m looking to get a recumbent bike for travelling long weekends around Europe. I don’t know much about bikes and I’m looking at recumbent mainly for comfort reasons; I tried biking long trips on a ...
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1answer
114 views

Stromer S1 bottom bracket replacement

I have a soon-to-be-unusable bottom bracket on a 2016 Stromer St1. I believe the cause is bearing failure. I cannot find the exact replacement online (BB-7420: BC 1.37 x 24 T: Shell 73 : spindle ...
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1answer
118 views

help finding a battery replacement?

We bought a Watseka XP Cargo Electric Bicycle off amazon back in 2014 recently is hasnt been working and after further inspection we found that one of the batteries has failed (the one pictured below)....
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2answers
321 views

Canyon Spectral:ON different wheel size (29''/27.5'')

Canyon Spectral:0N boasts a different wheel size: it has a 29''/2.5'' as front wheel and the 27.5''/2.8'' back. This difference in wheel size should make the bike more nimble and the extra-wide tyre ...
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0answers
107 views

Electric bike chain skipping on smallest sprocket

I recently bought a BH Lynx 6 electric mountain bike and so far have been having struggles getting it riding well. After getting it here and setting it up I found that in the highest gear (smallest ...
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1answer
292 views

Increasing length of seatpost on a foldable bike

One of my bike is this little Dohiker 14" electric bike, but I actually pedal a lot when riding it, and the seatpost is a bit too short. It is about 50cm long, and I would need a few more centimeters. ...
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4answers
3k views

Can I charge an ebike from another ebike battery?

I have a fiido d2s, and I love it. I'm not sure if I could upgrade to a bigger bike, because it fits so well in the back of my car and public transport. Anyway, it doesn't have a detachable/...
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1answer
91 views

i used a secondhand e bike kit but i cant get it to work [closed]

guys I put a secondhand e bike kit on my bike but it doesn't want to work its a 36volt 22amp the battery has full charge at out put of 42 volts hooked it all up push the thumb control nothing i have ...
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1answer
62 views

Tips for packing electrical cables near Giant Quick-E bottom bracket

I've been having major trouble getting all the cables back in after removing the bottom bracket electric motor from my Giant Quick-E. It's a rat's nest down there. There are cables coming from the ...
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1answer
726 views

E-bike battery charger making horrible noises, only works certain outlets?

I had posted on endless sphere but since then I have possibly made a little discovery. Tldr; I have a fresh 48v battery and charger around less than 3 months old. Very intermittently when trying to ...
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2answers
4k views

Ebike brake lever cutoff switch / interrupt switch : How does it work?

When pressing the brake lever on my ebike the bldc motor controller (aka ebike controller) 'cuts power' to the motor until the brake lever is released again/sensor is deactivated. I would love to know ...
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1answer
94 views

Will a 73 inch long electric bike fit with 28 inch wheels

2 Question. 1st. I am looking into buying a electric bike it is 73 inches from tire to tire will it fit in a muni bike rack 2nd will 28 inch wheels fit on a muni rack Thank you
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1answer
124 views

eBike winter battery power

My Bosch eBike has dual batteries which I usually ride with one battery. I feel like as the weather drops to freezing the bike power has dropped off slightly and when I ride with the second battery ...
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2answers
271 views

Raleigh Motus Tour 2018 - Chain electric bike replacement

I have to replace the chain of my Raleigh Motus Tour 2018. Do anyone knows the specify chain I have to buy? Because it is a electric bike I am almost sure that I should buy the KMC "e9 EPT for e-...
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1answer
1k views

Fiido D2: shock absorber broken

I bought almost an year ago a Fiido D2 bike. I use it everyday for my commute to work and unfortunately it broke. I brought it to a bike repairer and he said that there's nothing he can do. The only ...