PearTune MSO "Max Speed Off" 4.0 SMART for BROSE is a chip tuning set for e-bikes with BROSE engines and also with BROSE FIT system and compatible also with all SPECIALIZED models (1.1/1.2/1.3/2.1/2.2/2.0/1.1SL/1.2SL)!!!

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.

Buy directly from the manufacturer, buy from us!!

With ORIGINAL waterproof connectors = plug and play!!

We know our products, because we made them.

So, we can answer all Your questions and solve all Your technical problems!!

NEW 4.0 SMART version = enter to THE SERVICE MENU OF THE CHIP avalaible!


  • The speed limit is removed completely.
  • 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. Just plug & enjoy!



  • Activated and deactivated with LIGHT and/or +-+- buttons or WALK (for Specialized) or Still ON version.
  • Compatible connectors, miniature waterproof enclosure. Can be deinstalled without any signs.
  • Microcontroller-based electronics. Automatic adjustment of all the required parametrs.
  • Original diagnostics (highest level) did not find any signs of the device after removal.
  • Works seamlessly with all BROSE and BROSE FIT engines made from 2014 to 2024 and with all displays avalaible for BROSE engines
  • PearTune MSO 4.0 BROSE shows REAL all values on the display!!!
  • We make similar devices for all another SPECIALIZED, BOSCH, YAMAHA, GIANT, FLYON, PANASONIC and SHIMANO systems!!!

  • The software is configurated for communication with all controllers/displays, even with the BLUETOOTH dongle!
  • Developped and manufactured in Czech Republic.
  • More than 20 000 units sold.
  • CE and RoHS compliant. Use at your own risk, according to your local law.
  • All devices fully tested on real e-bike prior to shipping.
  • Comes with manual and instalation instructions.
  • We can issue full refund in case of any problems.