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This clever little device will derestrict your electric bike speed removing the 15.5mph UK & EU LEGAL limit.


Speed Tuning Derestriction for Electric Bikes Shimano

  • €141.82
£130.00 £169.00
Save 23%
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When you buy the Speed Tuning Derestriction for Electric Bikes Shimano, you will earn of rewards points to spend on your next purchase from us, anything online and instore.

Hassle free returns

- Easy * Fast * Fair -

Returns and Exchanges – for electric bikes and accessories

If you need to return or exchange an item, please login select the order you wish to return and process a return request. It couldn't be easier. We will process your exchange/refund as soon as we receive and open your return.

Items must be returned to the store you bought it from or your nearest store if purchased online.

If you have any queries regarding a the return of a faulty / unsuitable item please call your purchasing contact, your nearest store or email

Please note:

Items must be returned in their original condition complete with all packaging, manuals, labels etc.

We cannot accept return parts if the packaging has been opened. This is because components connected to faulty bikes may be damaged. To avoid disappointment we have a no nonsense professional diagnosis service available at all of our stores for a set fee of £50 (not including moped style eBikes).

Speed Tuning Derestriction for Electric Bikes Shimano

Season : 2019

Brand : Badass

Code : BadassShim

Weight : 0.00KG

Easily installs to the most popular Crank Drive e-Bike systems. The maximum speed will vary depending on the system and the e-bike, although we have seen maximum speeds in excess of 31mph.

What eGroupset does the Badasse-Bike Dongle work with? 


How does the tuning dongle fit?

This versatile little dongle can be easily fitted in a matter of seconds. In three easy steps. Slide the device over the Magnetic Speed sensor, usually located on the left lower chainstay of your e-Bike. Swap the standard phillips headed screw on the Magnet, located on a spoke in the rear wheel, with the new butterfly headed screw provided to easily move it around. Relocate the Magnet into the location shown in the Manual. It couldn't be any simpler.  If you have a restricted amount of space between the sensor and the spokes of less than 10mm, you may be required to fit the mounting bracket. Removing the dongle will return your e-Bike to its legal restricted speed.

Where can I use the speed tuning device?

This bit is important so please read. Current UK law will only allow you to use this device on PRIVATE LAND where you have the OWNERS PERMISSION. Fitting this device and using anywhere other than private land is AGAINST THE LAW. If used anywhere else, you will be doing so at your own risk. The Electric Transport Shop Ltd assumes no liability for any damage to property and / or injury to persons caused by improper use of this product. Please note we will never fit these devices and test rides are not available at our stores.


Customers from outside the UK are responsible for checking laws that apply locally and abiding by those laws. 

Can derestricting my e-Bike, cause problems?

Although we have had no reported technical issues due to using this dongle by using it you risk voiding your manufacturer warranties. We will continue to offer the free labour warranty that we offer with all e-bikes bought from us but if your e-bike manafacturer discovers a way to tell that you have unlocked your electric bike system they may void your bike warranty.

Shimano - Update to firmware version 4.7 causes problems for derestriction. We advise that you do not update if you have an earlier version and wish to use this product.



The badass tuning Box must not be used on public roads or in areas subject to the application of the Highway Code!

Use is restricted to private land, with the owners permission.We will never fit the Badasse-Bike Device for you. 

The installation of the badass Chiptuning Box can lead to loss of warranty of the e-bike.

The use of this product may legally invalidate any safety certifications of the bike and by using it you accept liability for your safety and those around you.

The badass Chiptuning Box is used at your own risk. Warning, risk of injury.

The Electric Transport Shop Ltd assumes no liability for any damage to property and / or injury to persons caused by improper use of the product.

  • €141.82
  • $139.93
  • $191.95
  • kr1,468.46
  • kr1,271.18
  • kr1,055.07
  • $206.95
  • ¥14,630.67
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

You Pre-Order is prioritised (at no additional charge); meaning that, as soon as the product arrives with us, we can wrap it straight back up and get it sent out to you - it often never even hits the stock room shelves!


With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery Dates

Estimated Delivery Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery Dates provided on product pages.

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