How To Derestrict a Bosch Gen 4 eBike in 2022

How To Derestrict a Bosch Gen 4 eBike in 2022


How to Derestrict an eBike with a Bosch Gen 4 motor in 2022? 

In this blog post we are going to explain how you can remove the speed restriction on your Bosch eBike (non-smart) by using either a VOLspeed V4 or Speedbox 3.0 tuning chip. We will also discuss the best tuning chips for the new Bosch Smart System eBikes released in 2022, scroll straight to the bottom you've got one of these. Before we start, please note that removing the speed limit on your eBike can void your warranty, eBikes with the speed restriction removed are illegal and only to be used on private land. 


How does tuning a Gen 4 (non-smart) motor work? 

The Gen 4 Performance Line CX motor was released in 2020 and is Bosch's motor powerful eBike motor to date providing 85nm of torque. This particular motor is the most popular for eBikes in 2021 & 2022 with the likes of Cube, Cannondale & Whyte choosing it as their motor of choice for their eBikes. The Gen 4 motor is extremely powerful - it will tackle the steepest climb with ease. However, despite all the power the 25km/h speed restriction will kick in, meaning that on the flat terrain you will be pedalling against the motor, unable to go any faster. For many, 25km/h is enough speed for an eBike. However, for those of us that want to be able to ride a bit faster, you will need a tuning chip. A tuning chip essentially removes the 25km/h speed restriction on your eBike and allows you to continue to pedal with assistance from your Performance Line CX motor. 

VOLspeed or Speedbox? 

There are a variety of different tuning chips available for the Bosch Gen 4 motor. In this section we are going to discuss the two most popular eBike tuning chips; VOLspeed V4 & Speedbox 3.0. We are aware of other options available, however due to the similar price points and reliability of these particular options we believe that these are the best chips available for the Performance Line CX motor. 

VOLspeed V4 for Bosch

Following the success of the VOLspeed V3 (read our review here), comes the V4 version. It is compatible with all Bosch eBikes from 2014-22 apart from the 'smart system' models due for release at the end of the year. Good news if you are currently on a 2018 Bosch Active Line but have plans to upgrade to Gen 4 in the future! 

The reason why we love this tuning chip so much is that not only does it remove the 25km/h speed restriction but it allows you to easily set a new max speed limit. This is a brilliant feature as it keeps you in control of the speed and gives you flexibility as it can be adjusted at anytime. The V4 version is now a true plug & play solution that doesn't require any initial programming. After installing the chip, simply press the minus button on your display for 3 seconds and select your new max speed limit (up to 45kmh). It's slightly more expensive than the V3 version but we think it's worth it as it removes any risk of human error during the initial setup. The VOLspeed V4 is compatible with all Bosch display units; Purion, Nyon, Kiox & Intuvia. 

How to setup a VOLspeed 

Speedbox 3.0

Speedbox is an eBike tuning OG, they have been around for many years and have the best selection of tuning chips available for all of the major eBike motors. In January 2020 they released their Speedbox 3.0 made specifically for the Bosch Gen 4 motor. Prior to the 3.0 they had the extremely reliable Speedbox 2.0 chip however due to the introduction of Anti-tuning software from Bosch, this was no longer compatible and they launched the new 3.0. 

As you can see from the photos, the VOLspeed and Speedbox are very similar in looks, with both tuning chips connecting in exactly the same way offering a true play & play solution. Simply press the 'Walk' button on your handlebar control and 6.2km/h will appear, meaning the tuning chip is active and the 25km/h restriction is removed. To turn the chip off, you simply press 'Walk' again and 1.6km/h will appear. Similar to the VOLspeed V4, the Speedbox 3.0 does allow you to set a new maximum speed limit however it is not done at the beginning of the installation. To set a new max speed, you need to press 'walk' and flick through the different eBike modes on your display. Compared to the VOLspeed V4 we found this feature to be quite difficult to use so we definitely feel the VOLspeed is better when it comes to setting a new max speed. 

One key difference between the two tuning chips is that when using the Speedbox 3.0 on a Bosch Gen 4 motor, you are required to leave the eBike on after finishing a ride until the value of 0.0km/h appears on the display. This countdown is in place to prevent the eBike from recognising that a tuning chip has been fitted. During the countdown a timer will appear on the display, showing you how long left until it's complete. For best practice we recommend leaving the eBike to turn itself off once the countdown is finished. 

How to setup a Speedbox 3.0

Will a tuning chip cause my eBike to go into Limp Mode?

The dreaded 'Limp Mode' is one phrase that all riders with Bosch motors will be aware of. Essentially it is where the eBike shuts down, an error code 504 appears on your display and means riding a very heavy bike back home with no motor assistance. The 504 error appears when the Bosch motor detects that a tuning chip is fitted. The good news is that this error can be easily cleared by riding for 90 minutes unassisted or doing this clever drill hack. It's worth noting that the 504 error has been known to appear on eBikes WITHOUT tuning chips fitted, if you are running the software, we highly recommend updating to the newest version to avoid any unwanted errors. From experience we have found it very rare for an eBike to go into limp mode with a VOLspeed V4 or Speedbox 3.0 fitted. If you set a sensible new max speed of 42km/h on the VOLspeed V4 and follow the countdown each time on the Speedbox 3.0 you shouldn't have any problems. 

Please note it is not 100% guaranteed, so if it does happen, don't worry, simply reset the eBike and you are good to go again. You can reset the eBike up to 3 times yourself. 

Which tuning chip should I choose? 

So you've read through the details of each tuning chip and are now ready to make a decision. We have tested both of these tuning chips extensively and believe that both are excellent choices for the Gen 4 Performance Line CX motor. However, if we had to choose between the two, we would opt for the VOLspeed V4 for two reasons;

1. Easily set a new max speed limit on your eBike

2. No countdown after completing a ride

Buy Now - VOLspeed V4 Bosch

All of our tuning chips are available to order from our UK & EU warehouses. We ship worldwide and accept GBP, EUR, USD, AUD, CAD. 


Bosch Smart System Tuning Chips

The Bosch Smart System was released in 2022 and requires a different tuning chip from the options we have shared above. If you own a 2022 model equipped with the Bosch Smart System your options are more limited but there are two great options available to you. 

How to tell if I have a Bosch Smart System eBike? 

You can easily tell if you have a Bosch Smart System eBike if it is fitted with a 750Wh battery. If your eBike has a 500Wh or 625Wh battery then you have a non-smart model. You will be able to fit either the VOLspeed V4 or Speedbox 3.0 that we discussed earlier in this post. 

Best Bosch Smart System Tuning Chips

Speedbox 1.0 B.Tuning Chip 

This is the premium bluetooth enabled option for riders that would like to see accurate speed/distance via the Speedbox smartphone app

Speedbox 1.0 Tuning Chip

 This is a standard option for riders that just want to derestrict their ebike, without the app integration

How does tuning a Bosch Smart System eBike work?

Just like with the Speedbox 3.0 both of these tuning chips fit directly to the motor with original connections. Once fitted, riders simply press the WALK button to activate the tuning chip (9.9kmh will appear on the display, indicating the chip is active). Riders have the choice to switch the chip off at anytime by simply pressing WALK again. 

With both of these chips a short countdown will appear on the display after completing a ride. Riders can just let the display turn itself off to ensure that accurate distances are recorded.

Can I see accurate speed on my Kiox display?

When in use, the display shows the real speed up to 22.2 km/h. After exceeding this speed your actual speed is indicated on the last two digits of the display.


- 22.3 corresponds to a speed of 23 km/h

- 23.1 corresponds to a speed of 31 km/h

- 24.5 corresponds to a speed of 45km/h

Which tuning chip should I choose? 

If you're someone that likes to have the latest technology we highly recommend the SpeedBox 1.0 B.Tuning. This premium version allows riders to connect their eBike to the SpeedBox app (available on iPhone & Android) where they can control their tuning chip and see accurate ride data in real time. 

If you're not too fussed about the app integration or ride data, go for the standard SpeedBox 1.0. Performance-wise it's exactly the same, you just give up all the fancy tech.

Both of these tuning chips are available to order now

Buy Now- SpeedBox 1.0 B.Tuning

Buy Now- SpeedBox 1.0 Standard

All of our tuning chips are available to order from our UK & EU warehouses. We ship worldwide and accept GBP, EUR, USD, AUD, CAD. 

We hope that you found this blog useful, be sure to follow us on Facebook and subscribe to our newsletter. Let us know in the comments if you have any questions, we'd love to hear from you! EBIKE TUNER are an authorised distributor of Speedbox tuning chips and the UK's exclusive distributor of VOLspeed tuning chips. Check out our website for more info!


This blog was updated on 8th August 2022

Please note that removing the speed limit on your eBike can void your warranty, eBikes with the speed restriction removed are illegal and only to be used on private land.


On 2021 Bosch’s Gen 4 motor
What happens if you just simply disconnect the OEM speed limit wire ?

Andrew Vlamos Snr

I would like to know if you have the release available for the new bosh Smart system 2022 (kiox300)

Luca caporale

Hi i have cube fitted with a bosch gen4 motor with latest update nov 2020. A couple of my mates have had problems with their speedbox error code multiple times on rides. Which box is the most reliable please?

Mike Chilton

Hi thank you for your very good article. Questions : would the volspeed v3 work with Bosch CargoLine CX with 2021 update (85Nm) ?


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