gursi123
100 µW
If I am doing something wrong or writing in the wrong forum let me know and I will delete it.
I have built a 2kw ebike using a hub motor kit that came complete with everything and I loved it but sold it as I wanted to make another more powerful build but is proving to be harder than I thougth. Nobody offers a ready to go 3kw hub motor build, or at least feauturing the specs I would like to have.
My perfect build would be:
Top speed: doesn't matter to me, probably will never even ride faster than 35 (maybe once in a long while 40) mph so even if it can't go faster than 35 mph is fine for me.
Range: plenty please, I am a deliveroo rider (food delivery rider) and the more range the better it is.
PAS!!!!: I would like to have a pedal assist function. To get the most range pedal assist is essential and I want a bicycle, not a motorcycle so pas is crucial.
Cassette: I can't really establish my mind to get that single speed hub motor, I really want a cassette at the back, possibly 9 speed (I know is too much considering that a 3kw motor drop out is already wide, 9 speed would make it too wide for normal mountain bikes) but anything including and over 6 speed is fine.
Budget: excluding the frame as I am planning to build it on my voodoo hoodoo that I already have, budget is £1300 max, I know, a tight budget!!
Occasionally want to bring it offroad so would like to have good torque and climbing ability, I don't mind sacrificing speed, as mensioned above.
I was looking at the mxus 3000 4t or 5t, but can't find anyone who offers a cassette option, maybe I didn't look hard enough but if there is any other motor out there that can support a cassette list it below I will have a look.
I know not many controllers support pedal assist and I couldn't fine any that does support it.
I would like to be able to limit the power output of the controller as I won't need 3kw all the time lets say limit it to 1.5kw when on the road so do I need a programmable controller? Sabvton perhaps even tho it is expensive and my budget is limited?
Now a few questions: difference between a 3t and a 5t is speed and torque, 5t offers way more torque and 3t spins faster at the same voltage compared to the 3t, let's say we run them both side to side on the same flat road at 20 mph with the same exact bike, controller, rider weight ecc.. (presuming that the 3t top speed on the wheel I got is 50mph and the 5t top speed is 40 mph) is the power consumption gonna be the same? What if we run them in the same condition but at 35 mph? Will the 3t motor consume less power than the 5t as the 5t is about to hit top speed? Now uphills, is the 5t just more efficient in climbing hills or it has more climbing capabilities? What I mean by this question is, is the 5t motor gonna consume less power to run up the same hill compared to the 3t motor if they are both travelling at the same speed, lets say 15% incline hill at 20mph, which motor is consuming more power? And by what % roughly and which one is getting hotter and bow faster is it getting hotter?
Now onto the controller: what if for my 3kw build I get a controller than can handle 4kw continuous, do I risk less on blowing it or the chances of blowing it are the same?
Final question is about battery: low voltage high amps or high voltage low amps? More specifically, if you were in my situation and wanted to build something like I want to, would you go for a 60v 25ah battery pack or a 72v 21ah pack? Both have the capacity of 1500 wh, that means both will give me the same range, in theory, but in practical, will they give me the same range?
I have considered the bbshd too but is well expensive, doesn't really fit in my budget (or it does? I might not have looked into it porperly?)
If you already know what I am looking for and have a ready list of the parts I need, list them, that would be perfect! Or if you can give a bit of advice too or something I need to know while building this, I am listening to that too.
Thanks for your replies, let's see what I can build
I have built a 2kw ebike using a hub motor kit that came complete with everything and I loved it but sold it as I wanted to make another more powerful build but is proving to be harder than I thougth. Nobody offers a ready to go 3kw hub motor build, or at least feauturing the specs I would like to have.
My perfect build would be:
Top speed: doesn't matter to me, probably will never even ride faster than 35 (maybe once in a long while 40) mph so even if it can't go faster than 35 mph is fine for me.
Range: plenty please, I am a deliveroo rider (food delivery rider) and the more range the better it is.
PAS!!!!: I would like to have a pedal assist function. To get the most range pedal assist is essential and I want a bicycle, not a motorcycle so pas is crucial.
Cassette: I can't really establish my mind to get that single speed hub motor, I really want a cassette at the back, possibly 9 speed (I know is too much considering that a 3kw motor drop out is already wide, 9 speed would make it too wide for normal mountain bikes) but anything including and over 6 speed is fine.
Budget: excluding the frame as I am planning to build it on my voodoo hoodoo that I already have, budget is £1300 max, I know, a tight budget!!
Occasionally want to bring it offroad so would like to have good torque and climbing ability, I don't mind sacrificing speed, as mensioned above.
I was looking at the mxus 3000 4t or 5t, but can't find anyone who offers a cassette option, maybe I didn't look hard enough but if there is any other motor out there that can support a cassette list it below I will have a look.
I know not many controllers support pedal assist and I couldn't fine any that does support it.
I would like to be able to limit the power output of the controller as I won't need 3kw all the time lets say limit it to 1.5kw when on the road so do I need a programmable controller? Sabvton perhaps even tho it is expensive and my budget is limited?
Now a few questions: difference between a 3t and a 5t is speed and torque, 5t offers way more torque and 3t spins faster at the same voltage compared to the 3t, let's say we run them both side to side on the same flat road at 20 mph with the same exact bike, controller, rider weight ecc.. (presuming that the 3t top speed on the wheel I got is 50mph and the 5t top speed is 40 mph) is the power consumption gonna be the same? What if we run them in the same condition but at 35 mph? Will the 3t motor consume less power than the 5t as the 5t is about to hit top speed? Now uphills, is the 5t just more efficient in climbing hills or it has more climbing capabilities? What I mean by this question is, is the 5t motor gonna consume less power to run up the same hill compared to the 3t motor if they are both travelling at the same speed, lets say 15% incline hill at 20mph, which motor is consuming more power? And by what % roughly and which one is getting hotter and bow faster is it getting hotter?
Now onto the controller: what if for my 3kw build I get a controller than can handle 4kw continuous, do I risk less on blowing it or the chances of blowing it are the same?
Final question is about battery: low voltage high amps or high voltage low amps? More specifically, if you were in my situation and wanted to build something like I want to, would you go for a 60v 25ah battery pack or a 72v 21ah pack? Both have the capacity of 1500 wh, that means both will give me the same range, in theory, but in practical, will they give me the same range?
I have considered the bbshd too but is well expensive, doesn't really fit in my budget (or it does? I might not have looked into it porperly?)
If you already know what I am looking for and have a ready list of the parts I need, list them, that would be perfect! Or if you can give a bit of advice too or something I need to know while building this, I am listening to that too.
Thanks for your replies, let's see what I can build
I hope that is at least including any display, is it? Also, can you use pedal assist with the phaserunner? And is it hard to program? Just read about an idiot who after hours of programming, reversed the polarities and fried the controller, was he really really stupid or is it a common mistake? Phaserunner can be programmed using your phone on the go too right? Phaserunner works only with cycle analyst or I can hook it up with a display too? As Id like to have the option where I can choose the power mode with just a click or two.
