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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Is it safe to use 4A charger on a 2A Battery

My Ebike uses a 48v battery, but the charging amperage listed on the side is 2A, and the original charger likewise is 2A. Having lost that charger, the replacement I could get on short notice is a 4A ...
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1 vote
1 answer
104 views

Carrera impel im-1 Electric Hybrid Bike ridgid to suspension fork

Hi there I have the Carrera impel im-1 Electric Hybrid Bike this bike has been great so far but as far as living in a town not quite a city there are some bumps and curbs I would like to get over more ...
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5 votes
2 answers
163 views

London Embankment cycle routes - are e-bikes allowed?

I went along these routes the other day for the first time since the pandemic. Specifically I'm talking about the route from Blackfriars to the West, i.e. to Westminster. I was annoyed by a number of ...
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12 votes
3 answers
2k views

Can I govern an ebike down to a lower speed?

I commute on my bike for fun and exercise, but my commute has two steep hills that kill my legs and add a significant amount of time to my route. I've looked at ebikes for their electric-assist ...
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4 votes
1 answer
94 views

Restoring motion to old front fork suspension?

I purchased an old used ebike recently and was initially excited that it had front suspension. On close inspection though I've discovered that the suspension appears to be broken. The sliders (bottom ...
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  • 229
5 votes
1 answer
564 views

How do I take off a bent suspension fork on an e-bike?

I was coming home from work one morning and hit a curb. I tried to stop but ran into the curb full force and bent my suspension fork to where it is touching the frame. I got a replacement fork for it ...
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2 votes
2 answers
283 views

How To Maintain a Electric Bicycle?

I had purchase an electric bicycle - Meraki from Ninety one cycles. It's very convenient and easy to use, but I still don't know how to do maintenance of my electric bicycle at home.
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3 votes
1 answer
194 views

E-Bike conversion kit battery compatibility question

I'm a pretty good home mechanic, but very new to the e-bike world. I bought a conversion kit off eBay recently without really doing my homework beforehand. The battery pack it came with doesn't ...
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2 votes
2 answers
239 views

Reading CAN bus data from Bosch Gen 2 engine

I'm looking for the protocol/guide to read the data from the CAN bus, but couldn't find on any (German) fora. Feedback/Answers are much appreciated.
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-3 votes
3 answers
287 views

How to make a hub motor Ebike faster? [closed]

I built an Ebike with a 1000w hub motor, 1000w motor controller and 48v battery. With this setup and a cheap steel frame 26 inch wheel bike I can get a 34.6 mph top speed on flat ground. I just bought ...
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5 votes
2 answers
400 views

Will a 24x4 in tire fit on a 26x4-in rim?

I purchased some slick fat tires online out of impulse, hoping that these 24x4 in tires would fit on my 26 by 4 inch rims. Or will they be too small?
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2 votes
1 answer
162 views

E-bike brake lever sensor wires loose

In my E-bike, sensor wires has come out from the left side brake lever. Please see attached photo from link below. How do I re-connect wires to sensor. How do I get access to sensor terminals? Do I ...
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0 votes
1 answer
126 views

Can I fit thinner tires on this bike? [duplicate]

I'm looking into buying the Orbea Vibe H10 (or H30). But the tires are a bit too bulky for my taste. Would it be possible to fit this bike with some thinner tires? I like the aesthetics of something ...
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5 votes
1 answer
314 views

Brake and chain problems after a muddy ride (ed. note: suspected chainsuck)

Recently I went for a ride, and it was a very muddy one. I blatantly misjudged the depth of a puddle and submerged half of my bike (and myself) in muddy water, including the chain and front/rear disk ...
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  • 123
1 vote
0 answers
67 views

Kona Honzo ESD + Bafang BBSHD?

My dream build would be the Honzo ESD with the BBSHD but before I pull the trigger on buying the frame (I plan to go 42t Bling Ring or an Eclipse ring with 8 or 9 speed cassette) , is there any issues ...
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1 vote
1 answer
52 views

Cannondale neo eq electric bike manual [closed]

Where can I find a manual for a Cannondale Neo Quick electric bike. I’ve searched online but can only find a supplementary Manual. This does not give any information about the functioning of the ...
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2 votes
2 answers
108 views

1x7 mtb electric conversion?

I picked up a '93 Marin Bear Valley SE from a vintage store and spent time restoring it (surface rust, old components etc). I was pleased with how it turned out and enjoyed riding it, nice old steel ...
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1 vote
1 answer
214 views

Hub motor is frozen!

I bought a 1500w motor & supposedly compatible controller from ebay. I put it together, and it worked good! I let it sit a few weeks. Hub is now FROZEN. it has ~2" of free roll then hard ...
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2 votes
1 answer
79 views

Crankset with one chainring and two chain guards?

I would like to custom build a crankset which would like the one I have on my ebike, but with more teeth. My current chainring is 52T, and I would like to go up to 58T. What I have is a four bolt, ...
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7 votes
3 answers
2k views

Why are folding fat-tire bikes all-electric?

There's an area in my state that has a good number of trails for mt biking, snow biking on large (4-in tire) fat bikes. I rented one at one time and it was fun in the snow. Many trails there are ...
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  • 461
0 votes
0 answers
106 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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0 votes
3 answers
246 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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1 vote
2 answers
110 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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7 votes
6 answers
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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  • 123
1 vote
1 answer
132 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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1 vote
2 answers
255 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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1 vote
1 answer
501 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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2 votes
2 answers
186 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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-1 votes
2 answers
57 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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1 vote
0 answers
260 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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1 vote
1 answer
169 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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0 votes
3 answers
250 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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1 vote
1 answer
171 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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16 votes
3 answers
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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  • 567
2 votes
1 answer
295 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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7 votes
4 answers
759 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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2 votes
2 answers
177 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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5 votes
2 answers
898 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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2 votes
1 answer
575 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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0 votes
1 answer
136 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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6 votes
2 answers
314 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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3 votes
1 answer
292 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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  • 141
0 votes
2 answers
111 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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2 votes
2 answers
593 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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  • 121
0 votes
1 answer
120 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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  • 485
2 votes
1 answer
88 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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4 votes
3 answers
4k 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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  • 319
0 votes
1 answer
322 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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  • 103
4 votes
4 answers
757 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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2 votes
0 answers
108 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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