• Warning!!

    Riding a tuned or deristricted EMTB is not a trivial offence and can have serious legal consequences. Also, many manufacturers can detect the use of a tuning device or deristricting method and may decline a repair under warranty if it was modified from the intended original specification. Deristricting EMTB's can also add increased loads for motors and batteries. Riding above the local law limit may reclassify the bike as a low-powered bike, requiring insurance, registration and a number plate.

    Be aware of your local country laws. Many laws prohibit use of modified EMTB's. It is your responsibility to check local laws. Ignoring it, has potential implications to trail access, and risk of prosecution in the event of an accident.

    UK Pedelec Law

    Worldwide Laws

    We advise members great caution. EMTB Forums accepts no liability for any content or advice given here. 

STUnlocker (ex Shimano STEPS Unlocker) Android & Windows App for derestriction/market change and etc

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
After changing wheel circumference from 2300 to 1429 on my ep8 rise the bike is performing great, however walk mode is now sprint mode and wants to propel the bike at around 8-10 mph.
Is there any way in STUnlocker or Etube pro to adjust the walk mode speed to something sensible that I can keep up with on foot?
Walk mode is not configurable. BTW, a selected gear affects on the walk mode output
 

nrgbod

Member
Mar 11, 2022
66
56
Middlesbrough
Thanks for the reply Vadll.
Yes even on the largest 51 tooth cog I can't keep up with it, even up 40% gradients.
I will switch it back to US country and standard circumference which is quick enough and doesn't affect walk mode.
I use walk mode quite a bit on some of the more challenging rides.
 

Big07

Member
Aug 23, 2020
23
8
Australia
I have used stunlocker a dozen or so times now. Every time to derestrict an ep800/8000/7000/etc.. I have not done a ep801 or ep801-rs
So far I have done this using an android phone to upgrade/downgrade the firmware.

I now have a SM-PCE02 and would like to take a look at the windows software.
The stunlocker website has a note which says "Windows version supports all firmware (of supported motors) for the derestriction, including the latest (August, 2024)".

Are there any new instructions/manual, etc?
Also with the SM-PCE02 can I change the region and/or circumference of a EP801 motor?
Thanks
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
You can use PCE02 with any supported bike and on any firmware.
EP801/EP6 motors are not supported for the derestriction
I have used stunlocker a dozen or so times now. Every time to derestrict an ep800/8000/7000/etc.. I have not done a ep801 or ep801-rs
So far I have done this using an android phone to upgrade/downgrade the firmware.

I now have a SM-PCE02 and would like to take a look at the windows software.
The stunlocker website has a note which says "Windows version supports all firmware (of supported motors) for the derestriction, including the latest (August, 2024)".

Are there any new instructions/manual, etc?
Also with the SM-PCE02 can I change the region and/or circumference of a EP801 motor?
Thanks
 

aarfeldt

E*POWAH Master
Subscriber
May 25, 2019
713
634
Denmark, Danstrup
I now have a SM-PCE02 and would like to take a look at the windows software.
Also with the SM-PCE02 can I change the region and/or circumference of a EP801 motor?
Thanks
I have also used STunlocker many times succesfully, and now I have EP801 and this is (currently) only supported by eMax and supports the new Shimano firmware with carry-over function - works great.
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
Are you working on the EP801/EP6 motors to supported derestriction?
No. Shimano fixed all latest firmware and remove everything from functionality via Bluetooth. I think that the only way to derestrict EP801/EP6 is to flash a patched firmware. Some guys do this via the PCE interface using remote desktop, because they don't want a patched firmware to leak into the public.
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
Since today, my STUnlocker/STRide Apps for Android will be free.

This decision was brought about by Google's position, which stopped paying developers from Russia (yes, I have a Russian passport), which led to the fact that any paid app by a Russian developer cannot be installed. Google tech support did not offer any alternatives. Despite having a residence permit from another country I will not be able to pass Google's requirements for new developers. It's funny that there are no problems with Apple, despite their stricter policy.

I want to say thank you to all those who bought the app, and please don't be offended by the fact that it is now free.

Happy New Year to everyone!
 

luna87824

E*POWAH Master
Subscriber
Jan 19, 2019
479
1,219
Just South of The Grand Canyon
Since today, my STUnlocker/STRide Apps for Android will be free.

This decision was brought about by Google's position, which stopped paying developers from Russia (yes, I have a Russian passport), which led to the fact that any paid app by a Russian developer cannot be installed. Google tech support did not offer any alternatives. Despite having a residence permit from another country I will not be able to pass Google's requirements for new developers. It's funny that there are no problems with Apple, despite their stricter policy.

I want to say thank you to all those who bought the app, and please don't be offended by the fact that it is now free.

Happy New Year to everyone!
Well that sucks!!
 

Dpgalvin

New Member
Feb 4, 2025
3
0
Ireland
Since today, my STUnlocker/STRide Apps for Android will be free.

This decision was brought about by Google's position, which stopped paying developers from Russia (yes, I have a Russian passport), which led to the fact that any paid app by a Russian developer cannot be installed. Google tech support did not offer any alternatives. Despite having a residence permit from another country I will not be able to pass Google's requirements for new developers. It's funny that there are no problems with Apple, despite their stricter policy.

I want to say thank you to all those who bought the app, and please don't be offended by the fact that it is now free.

Happy New Year to everyone!
Hi - I am looking to derestrict an ep8 motor but I think I have the latest firmware as I downloaded and installed it through the ride app before I heard it was possible to do a derestrict- is it possible to do your derestrict now on my bike ? I would be happy to pay for your help as I have no clue what I am doing to be honest !!!
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
Hi - I am looking to derestrict an ep8 motor but I think I have the latest firmware as I downloaded and installed it through the ride app before I heard it was possible to do a derestrict- is it possible to do your derestrict now on my bike ? I would be happy to pay for your help as I have no clue what I am doing to be honest !!!
You can do that using STUnlocker App. The downgrade is required for the derestriction (if you don't have PCE interface). After the derestriction you have to update firmware to an actual version. You can get all information via App (thru emails)
 

Dpgalvin

New Member
Feb 4, 2025
3
0
Ireland
You can do that using STUnlocker App. The downgrade is required for the derestriction (if you don't have PCE interface). After the derestriction you have to update firmware to an actual version. You can get all information via App (thru emails)
Thank you for your reply - I understand that It does not work with iPhone - do I I just borrow an android phone and it will work ?
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
Thank you for your reply - I understand that It does not work with iPhone - do I I just borrow an android phone and it will work ?
Android phone is only needed for downgrade. Find someone to help you with this. It takes 10 minutes to do everything.
 

Backflip

Member
Nov 6, 2023
116
78
Austria
Hi - I am looking to derestrict an ep8 motor but I think I have the latest firmware as I downloaded and installed it through the ride app before I heard it was possible to do a derestrict- is it possible to do your derestrict now on my bike ? I would be happy to pay for your help as I have no clue what I am doing to be honest !!!
Better not use the wording "ep8" because this abbreviation can be the older EP800 or the newer EP801 model which are completely different types of drive units.
Unfortunately both types of drive units have them singed as "EP8" on the right hand side motor cover (which in my eyes was a huge mistake and big fail from Shimano)...
So this "EP8" wording can easily lead to misunderstandings and so also create a waste of time.
Best is to check the exact motor type with the E-Tube-Project app from Shimano or ST-Unlocker first.
 
Last edited:

Sparrov

New Member
Mar 16, 2025
5
0
Poland
Just use STUnlocker for Windows. No downgrade is required.
How is your app different from eplus bike? Because I'm waiting for a bike with shimano ep801 and I want to unlock it, I saw there that they have an RS unlock option, can you do it with it too? I understand that I need a shimano device with a cable, can it be unlocked via smartphone? or only via PC? Is there an email with technical support?
 

vadII

E*POWAH Master
Feb 19, 2019
820
583
Earth
How is your app different from eplus bike? Because I'm waiting for a bike with shimano ep801 and I want to unlock it, I saw there that they have an RS unlock option, can you do it with it too? I understand that I need a shimano device with a cable, can it be unlocked via smartphone? or only via PC? Is there an email with technical support?
I know nothing about "eplus bike". Sorry
 

Backflip

Member
Nov 6, 2023
116
78
Austria
How is your app different from eplus bike? Because I'm waiting for a bike with shimano ep801 and I want to unlock it, I saw there that they have an RS unlock option, can you do it with it too? I understand that I need a shimano device with a cable, can it be unlocked via smartphone? or only via PC? Is there an email with technical support?
The guys from EPlus cannot modify (and speed up) an EP801 based bike with the latest motor firmware 4.4.1 anymore. The guys from EMAX are the only ones worldwide who can do that, see chapter 12 in this document. They also can do the "RS" unlock option. Just contact them and you will be happy. ;)
 
Last edited:

Sparrov

New Member
Mar 16, 2025
5
0
Poland
I’m buying a bike with the EP801 motor, and I’ll have it in a week.
I’d like to unlock it right away.

  1. Is there a problem if the firmware version is incorrect for unlocking it to 60 km/h, and can the version be downgraded?
  2. Can the RS version be set?
  3. Is it possible to set only the strongest mode on the RS version, or do you have to configure everything to the RS version at once?
  4. Apparently, Shimano has two profiles. Can one profile remain factory-set while the other is set to RS?
  5. What happens if the program doesn’t work?
  6. What should I do if I need to restore factory settings, for example, due to a motor failure, to send it in for warranty service?
 

luna87824

E*POWAH Master
Subscriber
Jan 19, 2019
479
1,219
Just South of The Grand Canyon
I’m buying a bike with the EP801 motor, and I’ll have it in a week.
I’d like to unlock it right away.

  1. Is there a problem if the firmware version is incorrect for unlocking it to 60 km/h, and can the version be downgraded?
  2. Can the RS version be set?
  3. Is it possible to set only the strongest mode on the RS version, or do you have to configure everything to the RS version at once?
  4. Apparently, Shimano has two profiles. Can one profile remain factory-set while the other is set to RS?
  5. What happens if the program doesn’t work?
  6. What should I do if I need to restore factory settings, for example, due to a motor failure, to send it in for warranty service?

vadII can not unlock ep801 motors.....​

 

Rob7672

New Member
Oct 23, 2024
3
0
Norway
Hello!

Is it possible to use the Android ST Unlocker app with the Shimano SM-PCE02 Interface via an USB OTG adapter ?

I dont have bluetooth on my bike.
 

Backflip

Member
Nov 6, 2023
116
78
Austria
Hello!

Is it possible to use the Android ST Unlocker app with the Shimano SM-PCE02 Interface via an USB OTG adapter ?

I dont have bluetooth on my bike.
The SM-PCE02 interface only runs in combination with a Microsoft - Windows based computer. So, you cannot connect this gear to an Android based device.
 

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