Sx2 dongle

The Sx2 Dongle - The classic dongle for many e-bike motors

The Sx2 Dongle is a classic among e-bike tuning solutions and has been on the market since 2012. With the Sx2 Dongle, you can remove the 25 km/h speed limit of your e-bike and thus utilize the full potential of the motors. The Sx2 Tuning Dongle works with e-bikes and pedelecs with various drive systems from Bosch, Panasonicic, shimano, Yamaha , Impulse 1, 2 & EVO, Brose & SpecializedWith this tuning tool, you can make your e-bike much faster in a very simple way. Since it's a plug-in solution, the tuning can be reversed at any time within seconds (one of the great advantages of the Sx2 dongle). Simply unplug the dongle, and the e-bike will regain its original handling characteristics, making it legal to use on public roads again. It couldn't be easier.

The Sx2 dongle is housed in a compact, pluggable 3,5 mm jack that simply needs to be connected in parallel to the e-bike's speed sensor. Incidentally, the dongle doesn't require separate batteries, and it doesn't interfere with your e-bike's motor electronics. Conveniently, all riding modes remain intact.

How does the Sx2 dongle work?

The operating principle of this proven tuning tool is essentially very simple: After connecting the dongle, the speed of your e-bike is divided by 20 at speeds above approximately 2 km/h, after which only half of the actual speed is displayed on the display. This removes the preset 25 km/h speed limit. The Sx2 dongle features encapsulated electronics, making it fully suitable for outdoor use.

Activation at the light switch:

Owners of e-bikes with Bosch and Yamaha drives can optionally choose versions with an “active switch,” which allows the Sx2 dongle to be conveniently switched on or off using the light switch:

Sx2 dongle with active switch and cable kit for Bosch
Sx2 dongle with active switch and cable kit for Yamaha PW (also for PW-X and PWS-SE)

If you encounter problems during installation - Troubleshooting:

Occasionally, installation issues may occur. Please proceed as follows:

Are the wires connected correctly (crimp terminals properly crimped) or soldered?
Were you able to measure the voltage according to the instructions (the dongle requires at least 4mA)?
Did you measure the current according to the instructions (Important: Often only the voltage comes back!)?
You can find out how to correctly measure current and voltage yourself in the PDF instructions on the respective product pages!
Please check whether the dongle switches later than 25 km/h (to do this, jack up the bike and turn the pedal up by hand to about 40 km/h - if the display only halves the speed after 25 km/h, the dongle is basically working)!
Please check the position of the magnet (on the spoke) and move it a few mm on the spoke (inwards and outwards)!
If no solution is in sight – email our Support with the following information: