Hi guys this is my first post, joined up coz I tried to do this build but am stuck. I am curious to know if I use the rear electric hub , what cranks do I use ? is it the freewheel chain ring type for $150USD or can you use a really good brand Shimano Deore one? as it is no use buying a freewheel crank , if I have a crank that is still functional and better quality, so if I did use mine, when the electric rear wheel hub is engaged won't this push the cranks as the chain is also connected in the circuit, I want the rear wheel to spin but not the crank, it would also be good to be able to have pedal assist in times when the battery is completely flat (god forbid) or if the bike one day fails on me, I would hate to have to push all that weight with no pedal assist, it would also be good to conserve battery sometimes and use pedal power to assist. what do you guys find the solution to this issue? is there a special crank to use? or bypass? or is it the rear sprocket that I fit to the hub that has to have a free spinning sprocket on it ? here Is a photo also of the frame I'm using
Building Electric Bike "Im Stuck!" :( what crank do you use?
- Thread starter Monsta65
- Start date
tiny_n_terrible
100 W
- Joined
- May 19, 2013
- Messages
- 236
?????
A Freehweel rear sprocket is what I use.They come in many sizes and multiple speed ratios commnly called speeds like a seven speed freewheel ETC. I sometimes use a freewheeling crank from sick bike parts as well as a rear freewheel. High speed belt and suspenders for my safety.
If the freewheel is overpowered and destroyed.
A Freehweel rear sprocket is what I use.They come in many sizes and multiple speed ratios commnly called speeds like a seven speed freewheel ETC. I sometimes use a freewheeling crank from sick bike parts as well as a rear freewheel. High speed belt and suspenders for my safety.
If the freewheel is overpowered and destroyed.
Chalo
100 TW
I think you should back up a few steps and learn how a bicycle works. Check out a how-to book from your local library. Read up on sheldonbrown.com, or poke around tutorial videos on YouTube.
If you try to build up an e-bike without first understanding how a normal bike works, you'll spend a lot of extra time and effort to get a less satisfactory result.
If you try to build up an e-bike without first understanding how a normal bike works, you'll spend a lot of extra time and effort to get a less satisfactory result.
tiny_n_terrible said:
Hey bud thanks for your help, I have tried to google and flebay these things but nothing comes up except for when I search "freewheel" and it comes up with a cheap looking crank that is about $200 shipped to Australia, for that kind of money I'm able to get a very high end good quality crank. Do you know where I am able to get these rear freewheel sprockets from , or one you highly recommend ? or do they sell these on eBay, in regard to high speed belt and suspenders "now I'm completely lost" Never heard of this in my life. I will do research on them, thanks for the heads up, potentially saved my life or some serious injury. Im going to be also running a high power rear hub , so definitely something I'm now going to incorporate into my build !
Removed information the troll that started the thread does not want to see, even though it answered specific questions he asked.
Don't worry, I won't feed this one anymore.Monsta65 said:
Your funny, but really funny. I built 23 high performance cars in my life including a V12 AMG SL65 and your comments lol. Cool story my question was , what was the experience most guys building electric bikes had with freewheel crank system or sprockets and why? but lets not get into induction forced turbines bored to a tenth of a millimetre with forged pistons done all in one week!
DO NOT FEED TROLLS!
DO NOT FEED TROLLS!
skeetab5780
1 MW
Just go to sickbikeparts.com and buy a bunch of crap, if you get the wrong thing then you get to have spare useless parts! Its pretty straight forward.
Good luck on your washing machine build im sure your cars are faster
Good luck on your washing machine build im sure your cars are faster
e-beach
10 MW
Sounds like you got off on the wrong foot with some of our most experienced..... :? Your post doesn't show you know the different part of the bike yet.
Ok, this is what I think...
Oh and technically, the mechanical parts of the bike, like the freewheel aren't considered to be part of a "circuit" because they are mechanical not electrical.
Hope this helps. And, cars are not bikes so brushing up on what parts of a bike are, as advised above will only help you with your build.
Edit: Check this out.....https://www.nashbar.com/webapp/wcs/...d=10052&dynamicSpotName=sizeforbikeSpot_Part1
Ok, this is what I think...
The one that fits your bike. Get the measurements on your bottom bracket and go from there.Monsta65 said:
"is it the freewheel chain ring type" not sure what you mean by that. Freewheels and Chainrings are different parts of the bike. However, you can use a good brand like Shimano Deore for both the chain rings (they attach to the crank) and what ever the rear hub motor uses for the rear hub motor. In my experience they usually use a "thread-on freewheel"Monsta65 said:
As stated above freewheel and crank are different bike parts.Monsta65 said:
No. That is the purpose of the freewheel, so the wheel spins freely. You might be thinking of how a fixie (fixed wheel) works.Monsta65 said:
Oh and technically, the mechanical parts of the bike, like the freewheel aren't considered to be part of a "circuit" because they are mechanical not electrical.
The freewheel takes care of all that. :wink:Monsta65 said:
I usually go slower to conserve battery, or go slower and pedal. Either way you will go further then battery alone.Monsta65 said:
No the one that fits your bike and budget is the one to use. Just know that cranks can be longer or shorter depending on the bike. 170mm length seems to be common.Monsta65 said:
I don't know what you mean by "Bypass".Monsta65 said:
Yep.Monsta65 said:
Hope this helps. And, cars are not bikes so brushing up on what parts of a bike are, as advised above will only help you with your build.
Edit: Check this out.....https://www.nashbar.com/webapp/wcs/...d=10052&dynamicSpotName=sizeforbikeSpot_Part1
Voltron
1 MW
You don't need a freewheeling crank if you have a hub motor is the simple answer.
You only need a freewheeling crank if you have a frame mount mid drive like a Tangent or a Cyclone etc, otherwise your feet spin around when the motor is on.
You only need a freewheeling crank if you have a frame mount mid drive like a Tangent or a Cyclone etc, otherwise your feet spin around when the motor is on.
e-beach said:Sounds like you got off on the wrong foot with some of our most experienced..... :? Your post doesn't show you know the different part of the bike yet.
Ok, this is what I think...
The one that fits your bike. Get the measurements on your bottom bracket and go from there.Monsta65 said:
"is it the freewheel chain ring type" not sure what you mean by that. Freewheels and Chainrings are different parts of the bike. However, you can use a good brand like Shimano Deore for both the chain rings (they attach to the crank) and what ever the rear hub motor uses for the rear hub motor. In my experience they usually use a "thread-on freewheel"Monsta65 said:
As stated above freewheel and crank are different bike parts.Monsta65 said:
No. That is the purpose of the freewheel, so the wheel spins freely. You might be thinking of how a fixie (fixed wheel) works.Monsta65 said:
Oh and technically, the mechanical parts of the bike, like the freewheel aren't considered to be part of a "circuit" because they are mechanical not electrical.
The freewheel takes care of all that. :wink:Monsta65 said:
I usually go slower to conserve battery, or go slower and pedal. Either way you will go further then battery alone.Monsta65 said:
No the one that fits your bike and budget is the one to use. Just know that cranks can be longer or shorter depending on the bike. 170mm length seems to be common.Monsta65 said:
I don't know what you mean by "Bypass".Monsta65 said:
Yep.Monsta65 said:
Hope this helps. And, cars are not bikes so brushing up on what parts of a bike are, as advised above will only help you with your build.
Edit: Check this out.....https://www.nashbar.com/webapp/wcs/...d=10052&dynamicSpotName=sizeforbikeSpot_Part1
circuit
ˈsəːkɪt/Submit
noun
1.
a roughly circular line, route, or movement that starts and finishes at the same place.
"I ran a circuit of the village"
synonyms: lap, turn, tour, round, circle, orbit, revolution, loop; beat
"two circuits of the village green"
2.
an established itinerary of events or venues used for a particular activity, typically involving sport or public performance.
"the alternative cabaret circuit"
3.
a complete and closed path around which a circulating electric current can flow.
"the maximum number of light fittings on a circuit is twelve"
verb
verb: circuit; 3rd person present: circuits; past tense: circuited; past participle: circuited; gerund or present participle: circuiting
1.
move all the way around (a place or thing).
"the trains will follow the Northern line, circuiting the capital"
oh what about petrol cars on a circuit ? where is the electricity, brush up on your English my friend before you begin to troll
e-beach
10 MW
What ever buba..... 
Just don't expect help from many around here with your bad attitude. You won't be getting much help from me.
Just don't expect help from many around here with your bad attitude. You won't be getting much help from me. Voltron
1 MW
Well, to be fair, the OP sounded confused but excited about diving into a new area of skill sets. Even though he was asking the question in a complicated way it had a pretty simple answer... but it seemed like maybe the focus was more on him needing to learn to talk more like a bike guy, and not parsing out what the confusion actually was....
But I know we can all come together on hoping another great ebike gets rolling.
But I know we can all come together on hoping another great ebike gets rolling.
Anyone being an ass to people who are trying to help is gonna have a hard time getting anyone to want to help or care whether anything ever works out for the project.
Chalo
100 TW
To be even fairer, the OP's question was so confused that I couldn't be certain what he was even asking. I could only be certain that he didn't know what he was talking about, didn't understand what he was working on.
That that point, "study some more" is more valuable advice than a simple answer to the question you think he might be trying to ask. Fundamental lack of understanding will only leave him stuck again with the same kind of problem.
That that point, "study some more" is more valuable advice than a simple answer to the question you think he might be trying to ask. Fundamental lack of understanding will only leave him stuck again with the same kind of problem.
Voltron
1 MW
Def not saying more study isn't a great thing, or that the question wasn't confusing... I'm just used to really enthusiastic confused people I guess
e-beach
10 MW
Voltron said:...... I'm just used to really enthusiastic confused people I guess
Enthusiastic is one thing. Incoherence is something else. Belligerence is another thing and ingratitude is another.
The inability to write a coherent post and then to flame on those who offer help....? Demanding a study of English despite an almost incoherent post falls into the "Oh Really" category for me?
And, the whole thing falls into the "O.K, you'll get no help from me" basket because even the confused are mostly grateful for the help.
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