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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35 views

Specialized Turbo “LO BAT” error with torque loss

My Specialized Turbo has started showing momentary (5 second) “LO BAT” errors on the display, and at the same time the motor switches from torque to a stuttering high drag condition. This only ...
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3answers
158 views

How much human-provided power is needed on an e-bike?

If we want to ride 50 miles (80 km) on a 35lb (15.9kg) Class 2 e-bike at an average speed of 20mph (32 km/h), how much power does the human need to provide if e-bike is on light-assist setting?
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87 views

Is the stepless shifting hub that is rated for 75/90 NM torque inadequate for the 75 NM engine?

The bicycle I am thinking to buy has a stepless shifting hub that is officially rated for 75 NM typical and 90 NM maximal torque. The electric engine of the bike can provide 75 NM at the maximal ...
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5answers
2k views

Brake disc sometimes touching brake pad when not braking

I have a Whistle B-Race 7.1 e-bike that's about 3 months old. Recently the front disc brake has started touching the brake pads when not braking, when it does you can hear a "zing" sound. It ...
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1answer
62 views

Connecting 8 pin cable to 9 pin cable

I don't want anyone to drown in details, but long story short, I had to change my e bike's driver and I wanted to buy something more powerful. I bought a driver that supported 48 V but sadly, I missed ...
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1answer
99 views

E-Bike Battery not working

I have borrowed an e-bike from a friend few days ago. Yesterday battery was empty so I left it to charge last night. I left it overnight. Now when I put it in bike it does not work, not responding. I ...
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1answer
147 views

eBike: use 48v motor with 36v controller and battery

On one DIY eBike I currently have a 36v 250w rear hub kit. It's a "cassette" version, not "freewheel". Problem is, the internal freewheel mecanism of the wheel is very damaged (...
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2answers
116 views

Is it normal that the pedalling assistance gets significantly less on an e-bike with low battery?

I recently bought my first e-bike (Coboc Montreal Seven), which is advertised to have a ‘natural riding feeling’ by measuring torque sensor signals and translating them to the ‘right’ amount of ...
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2answers
44 views

Fitting ebike kit, changing rim diameter?

I have a 27.5 inch mountain bike, am wondering if I bought a 26 inch ebike kit would it work with the disc brakes because of the size difference? It's for the rear wheel.
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0answers
51 views

How to fix Shimano E7000 Error 010?

Can anyone guide me to clear the E010 error code on a Shimano E7000? I tried all the steps according to the manual but can't resolve them.
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1answer
122 views

Where are light connector terminals on an E-bike?

There are many various lights currently on the market that are marketed as "designed for E-bikes". They have external power connectors. Of course, the voltage must also match but I am not ...
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3answers
167 views

What are the smallest wheels legally allowed on an ebike or etrike before it becomes an escooter?

First, I have done much searching on this subject. I read that escooters are illegal and ebikes are legal in the UK (broadly speaking, if 250W, pedal assist and speed limited). It seems to me that the ...
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1answer
169 views

Can I make a trip of 260 km across Japan with a pedal assist bike? [closed]

Just curious if it sounds crazy to use a PEDAL ASSIST E-Bike to make a trip across Japan...somewhere like 260KMs total. Also what are some good bags (that don't make my back sweat so much) and pants ...
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3answers
3k views

How many watts are lost when pedalling on Bosch e-bike without a motor/electricity?

When pedalling a Bosch e-bike when its motor/electricity is off, how many watts are lost compared to non-ebike drivetrain? If it differs, let's assume a Bosch Performance CX and 250 watts input power ...
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0answers
114 views

Where is the light harness connection on Giant Roam E bike?

I gather that my Roam E has the wiring to enable me to add a light to run from the light switch on the controller. I have looked at various videos, but the set up on my Roam E is different. Does ...
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4answers
704 views

Heating of hydraulic oil with hardtail electric MTB brakes

I do an ebike commute here in NZ with a steep downhill at the end of the ride at night and a longish downhill in the morning.Brakes are Shimano Hydraulic MT200, 180mm Rotors and pads were Shimano ...
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2answers
140 views

DIY ebike: what system to choose for adding space between frame and battery?

So, the project is to install this 5kg battery: on this bike: This is no joke. I'm serious. Following up to this previous question, I'm going to use steel rivnuts (aluminium is really too light for ...
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2answers
886 views

Does it makes sense to buy a women's seat for man's mountain bicycle?

We are buying an electric mountain bike, a Specialized Turbo Levo SL, for my wife. It's a men's bike, and I see, for example, the SCOTT Contessa differs from men's models by having a women's seat, ...
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1answer
412 views

Blind rivet nuts for ebike battery on frame: aluminium or steel?

I'm planning my first installation of an ebike battery by drilling/riveting the frame (photo of the battery below), here are some details about the project: The battery weights about 5 kg. It's a ...
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73 views

Shimano Steps 6100 loses power assist climbing hills

Having problems with bike losing power going up hill - 4 of last 5 rides. About 400 miles on bike (BMC Alpenchallenge AMP Sport). Have several 40+ mile rides with 4,000' of elev, so it works. Now I'...
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2answers
235 views

Are small radially laced motor hub wheels like Swytch trash?

I saw a bike that recently had this kit installed on it, and was surprised at the radial spokes: From having done rebuilds on 20" motor hub wheels, I can appreciate the temptation to look at ...
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1answer
160 views

Why are electric bikes ranked on torque ratings?

A major ranking criterion for electric bikes is the torque rating of the motor. Generally speaking, bikes/motors with higher torques are sold at a higher price than bikes/motors with lower torques. As ...
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2answers
98 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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2answers
160 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
81 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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1answer
85 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
2k 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
229 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
745 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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0answers
76 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
155 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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2answers
461 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
102 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
138 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
198 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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83 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
237 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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2answers
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
204 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
664 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
43 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
214 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
857 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
174 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
282 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
2k 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
9k 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
1k 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
211 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
314 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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