Shengmilo mx03

Eucrider

Member
Region
United Kingdom
I can't see a review discussion post for this bike so thought I'd start one

Specs - 48v 17ah (upgradable to 25ah and 1000watt ( don't think it gives the full 1000watt but close )

I have the Shengmilo mx03 it's an excellent bike if you know what you want it for, I did 29 miles with more than 60%battery left this was on pas2 mainly flat with some short hills , hills are no problem if you switch to biggest cog and choose the right assist(check the Relive link)
I checked the next day on pas3 same route and had 30% battery left ,
I went out again 2 days after and thought I'd give the motor a test (hills) I got 27 miles until battery depleted but I did go up some rather steep hills and had to work on the steepest climbs but I did stay in the saddle ,
Overall I'm happy with the bike for getting out and about if you want to climb mountains get a mid drive motor ,I pedal in manual mode meaning I use half energy and it assists when needed and if I go over 16mph in pas2 the current fluctuates from 2-1 on the display to conserve battery( I usually ride in 2/3 pas but found 2 is the best otherwise I'll miss the scenery,
Also @Jenny Mao can also provide the new 48v 25ah battery which fits which I might purchase later on I think it uses Samsung 5000 cells so should see good range and power
Any questions or mods anyone has done good or bad is welcome

 

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Timpo

Well-Known Member
I can't see a review discussion post for this bike so thought I'd start one

Specs - 48v 17ah (upgradable to 25ah and 1000watt ( don't think it gives the full 1000watt but close )

I have the Shengmilo mx03 it's an excellent bike if you know what you want it for, I did 29 miles with more than 60%battery left this was on pas2 mainly flat with some short hills , hills are no problem if you switch to biggest cog and choose the right assist(check the Relive link)
I checked the next day on pas3 same route and had 30% battery left ,
I went out again 2 days after and thought I'd give the motor a test (hills) I got 27 miles until battery depleted but I did go up some rather steep hills and had to work on the steepest climbs but I did stay in the saddle ,
Overall I'm happy with the bike for getting out and about if you want to climb mountains get a mid drive motor ,I pedal in manual mode meaning I use half energy and it assists when needed and if I go over 16mph in pas2 the current fluctuates from 2-1 on the display to conserve battery( I usually ride in 2/3 pas but found 2 is the best otherwise I'll miss the scenery,
Also @Jenny Mao can also provide the new 48v 25ah battery which fits which I might purchase later on I think it uses Samsung 5000 cells so should see good range and power
Any questions or mods anyone has done good or bad is welcome

so it's not 1000w?
what's the spec of controller?

it doesn't say anything here
 

Eucrider

Member
Region
United Kingdom
so it's not 1000w?
what's the spec of controller?

it doesn't say anything here
It's only 18amp controller so possibly only giving 864watts but that's good enough tbh it pulls plenty good I could always change controller but why mess with it if its OK or I shunt it but risk damage it so I'll leave a it is.
Still better than 250watt UK standard so I'm happy for £1100 for the bike
 

Timpo

Well-Known Member
It's only 18amp controller so possibly only giving 864watts but that's good enough tbh it pulls plenty good I could always change controller but why mess with it if its OK or I shunt it but risk damage it so I'll leave a it is.
Still better than 250watt UK standard so I'm happy for £1100 for the bike
What motor is it?
Bafang?
I don't see the logo so I was just curious.
 

Timpo

Well-Known Member
You might want to replace the crank and chainring soon.
That chainring is so cheap that it will bend.

If you ever have chain dropping problem or noise from chain, that could be bent chainring.
It will probably be straight now, as it is brand new, but in my experience they bend pretty easily after a while.

I kept buying that same thing three times until I resort to Deckas chainring as someone here on EBR mentioned.
 

Eucrider

Member
Region
United Kingdom
What motor is it?
Bafang?
I don't see the logo so I was just curious.
It maybe a rebranded motor I'm not sure but it's better than any 250watt motor I've had and pulls up hill fine ,maybe someone else will know so I've attached picture thanks
 

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Eucrider

Member
Region
United Kingdom
You might want to replace the crank and chainring soon.
That chainring is so cheap that it will bend.

If you ever have chain dropping problem or noise from chain, that could be bent chainring.
It will probably be straight now, as it is brand new, but in my experience they bend pretty easily after a while.

I kept buying that same thing three times until I resort to Deckas chainring as someone here on EBR mentioned.
Thanks for that I'll look into the chain ring you posted thanks , what size chainring is it please
 

Timpo

Well-Known Member
Thanks for that I'll look into the chain ring you posted thanks , what size chainring is it please
I am not sure about the size, visually, looks like you have 48T or 52T, however, you can get whatever you want.
As long as you stay within that range, you won't have to re-adjust the chain length.

What you have right now is one of these.
It is a press-fit chainring, attached to the crankarm, you won't be able to separate them.
These types of press-fit chainrings will bend, I've tried a few different kinds, but they're all the same thing.

However, something like this is much better.

You can get the crankarm, bolts, chainring, chainring guard (if needed) separately, so it's a lot more customizable too.

I ended up getting a 130BCD crank, and Deckas chainring, as suggested by other members here on EBR.
It has narrow-wide pattern, so a lot more secure as well.
https://www.aliexpress.com/item/4001323100425.html?spm=a2g0o.productlist.0.0.59fc44cfhKIfwH
 

Timpo

Well-Known Member
It maybe a rebranded motor I'm not sure but it's better than any 250watt motor I've had and pulls up hill fine ,maybe someone else will know so I've attached picture thanks
Yeah I am not sure, they all look similar.
I thought Himiway was powered by Bafang, but it was powered by Ivanxing.
 

Eucrider

Member
Region
United Kingdom
so it's not 1000w?
what's the spec of controller?

it doesn't say anything here
Here's a pic of the controller, I could easily shunt it if wanted but tbh I don't need it
 

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Cristian

New Member
Region
Europe
Here's a pic of the controller, I could easily shunt it if wanted but tbh I don't need it

Here's a pic of the controller, I could easily shunt it if wanted but tbh I don't need it
hi, I have mounted the KT CONTROLLER 25A to my Mx03 bike with the LCD8H display.
the technicians warned me not to exceed 25a because with the 30a there is a serious risk of burning everything if you don't have a bafang engine.
it now has much more torque and smoother acceleration
I notice it especially in the climbs.
the display finally marks the wattage in real time, and pushes to the maximum to 1100watts effective.
the maximum speed has remained unchanged but has more power when needed.
the cruise control works, and also the original light and horn of the bike.
the controller has a delivery that simulates the torque sensor and seems to optimize the autonomy which seems to me to have remained unchanged, but I have not yet had the opportunity to test it.
probably with the 25ah battery it would improve further.

i'm waiting for the 25ah battery test you ordered.
 

Eucrider

Member
Region
United Kingdom
hi, I have mounted the KT CONTROLLER 25A to my Mx03 bike with the LCD8H display.
the technicians warned me not to exceed 25a because with the 30a there is a serious risk of burning everything if you don't have a bafang engine.
it now has much more torque and smoother acceleration
I notice it especially in the climbs.
the display finally marks the wattage in real time, and pushes to the maximum to 1100watts effective.
the maximum speed has remained unchanged but has more power when needed.
the cruise control works, and also the original light and horn of the bike.
the controller has a delivery that simulates the torque sensor and seems to optimize the autonomy which seems to me to have remained unchanged, but I have not yet had the opportunity to test it.
probably with the 25ah battery it would improve further.

i'm waiting for the 25ah battery test you ordered.
I did a test on a really really really steep climb,
before and after the change
Hi Christian thanks for the update that's great news I'll probably end up buying the same as that's what I've been reading about , was a straight forward swap with the wiring a or do you have details where to connect each wire as colour difference maybe? @Jenny Mao is going to ship the battery this week fingers crossed its been a hard covid time in shanghai but she's very professional and answers chat
I'll test the battery thoroughly before I upgrade the controller etc but tbh I don't need massive torque but power does weaken when below 50%battery so I'm hoping the 25ah battery will keep the power for longer and very good range so I might be happy enough ,I'll keep updating this thread and thanks for your updates
 

Jenny Mao

Active Member
Region
Asia
It is 30amp BMS that used for Dorado 25Ah, so 20A or max 25A controller is suggested. The low discharging current will prolong the battery lifetime.
 

Eucrider

Member
Region
United Kingdom
Hi guys received 25ah battery today from @Jenny Mao got to goto work now so I'll update tomorrow, I did put it on the bike and everything fits and turns on , I'll update tomorrow on my day off cheers guys,, I'll show you what it looks like tomorrow on the bike ,,here's the weight difference
 

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Eucrider

Member
Region
United Kingdom
Had a quick ride out today mostly steep hills, covered 21 miles and voltage went from 54v to 51.5 using power assist 2-5 (hills was steep) , battery still showing full, the power delivery is smooth with no battery sag at all , I was smiling away going up the hills using the right gears as appropriate and using good maintained speed up the steep hills I'll finish the battery tomorrow it will be mainly flat riding, I want to see if there's much battery sag near the end of battery and then give it a good charge , the battery is a little bit bulkier than original but not too much(see pics first 2 are 25ah battery)
So far I'm happy with the performance but much more testing needed.
The battery fits well and plenty of clearance if any shengmilo mx03 owners wondered, any questions or requests welcome ,
One thing I noticed when riding up steep hills before I got this battery was it could do with a little bit more torque but with this battery there's no voltage drop/sag and handle them well obviously with a bit of effort that's how I like to use my gears, I'll keep this thread updated
 

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Jenny Mao

Active Member
Region
Asia
The 25Ah looks perfectly fit on the shengmilo mx03. Thanks for sharing us so many pics and the real testing experience.
 

Eucrider

Member
Region
United Kingdom
Had a quick ride out today mostly steep hills, covered 21 miles and voltage went from 54v to 51.5 using power assist 2-5 (hills was steep) , battery still showing full, the power delivery is smooth with no battery sag at all , I was smiling away going up the hills using the right gears as appropriate and using good maintained speed up the steep hills I'll finish the battery tomorrow it will be mainly flat riding, I want to see if there's much battery sag near the end of battery and then give it a good charge , the video battery is a little bit bulkier than original but not too much(see pics first 2 are 25ah battery)
So far I'm happy with the performance but much more testing needed.
The battery fits well and plenty of clearance if any shengmilo mx03 owners wondered, any questions or requests welcome ,
One thing I noticed when riding up steep hills before I got this battery was it could do wi28+21 mikes =49 miles and still have th a little bit more torque but with this battery there's no voltage drop/sag and handle them well obviously with a bit of effort that's how I like to use my gears, I'll keep this thread updated
Did another 28 miles yesterday so 28+21=49 Miles and still more than half battery left 47.6 volts remaining ill finish it off before I recharge, battery is exceeding my expectation because I have been using higher power assist and plenty of steep long hills ,definitely a 80-100 mile battery depending what it's used for ,I'm a happy customer and @Jenny Mao has been excellent at customer service even through covid delays she is definitely recommended for batteries and will help you out and information given ,, thx again I'll update again with a video
 

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