PearTune MSO 4.0 is a "chiptuning" set for e-bikes.
It can remove the speed limiter from your e-bike, so the bike will not stop assisting at higher speeds.
The function can be turned on or off at any time during a ride.

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ORIGINAL CONNECTORS!!!

REAL SPEED and all other values for Bosch Gen2, Gen3, Gen4 

(instead of SMART system)

VERY SMALL SIZE = easy installation


!!!NOT compatible with RIM magnet on SMART system!!!

It can remove the speed limiter from your e-bike, so the bike will not stop assisting at higher speeds than 25Km/h.

The function can be turned on or off at any time during a ride.

PLUG and PLAY easy connection

You can switch ON/OFF by one short press WALK button ANYTIME during the ride!!!

ACTUAL SPEED and all other values are truly displayed on the display

VERY SMALL SIZE = easy installation

The speed limit is REMOVED completely without any side effects. Not just shifted to 50km/h.

All display readings and control works correctly. No speed or mileage halving.

  • The total mileage counter stays correct even after device removal.
  • Unlike similar sets, this device shows no display flickering or other unwanted effects. Everything else, but the speed limit removal, stays the same.
  • The only difference is that you can go the speed you want with your bike. 60km/h with assist? Just plug & enjoy!



  • Activated and deactivated with one SHORT or LONG press of WALK button!
  • Plug and play connectors, miniature waterproof enclosure. Can be deinstalled without any signs.
  • Microcontroller-based electronics. Automatic adjustment of all the required parametrs.
  • Original Bosch diagnostics (highest level) did not find any signs of the device after removal.
  • Works seamlessly with Bosch Active/Performance/CX Line, Active PLUS, Bosch with SMART system included latest 11.13.0 SW version!!!
  • We offer similar device for Yamaha, GIANT, BROSE, Shimano, Specialized, FLYON, Panasonic, SACHS, BAFANG, etc.
  • Designed and manufactured in the Czech Republic.
  • More than 50000 units sold worldwide, including UK and US with MPH reading!!!
  • All devices fully tested on real e-bike prior to shipping.
  • Comes with manual and installation instructions.
  • CE and RoHS compliant.
  • It is the user's responsibility to use this device in compliance with local law.
  • Upon request, we can configure the device for Still ON state = you dont need to press any button for activation/deactivation.
  • We can issue full refund in case of any problems with compatibility.