BioShift automatic shifting system - first ride

Never think about gear selection again

BioShift is an automatic shifting system, that could mean you never need to think about gear selection again. It's a product of US research and development by Baron BioSystems and works together with Shimano’s existing Di2 electronic components.

BikeRadar’s Joe Norledge jumped at a recent opportunity to test-ride this fully automatic electronic transmission. Bioshift’s Armando Mastracci was kind enough to provide us with a Bioshift-equipped test bike, which Joe put through its paces on the roads of Bristol.

Find out how he got on in the video report below:

The bike that shifts itself

Video: first ride on the BioShift automatic shifting system

So how does Bioshift work? Firstly, rider-specific parameters and details on the bike's transmission are first programmed into the handlebar-mounted unit. Then data pulled from speed and cadence sensors and a hub-based power meter is processed through an algorithm to determine optimum gear choice.

Bioshift is also programmed to avoid ratios that result in an extreme chainline and has the ability to restrict certain actions, for example the front derailleur will not shift in a high-torque climbing scenario. 

It's still early days for this system and BioShift is aiming to develop a simpler, better-integrated version of this technology for electronic shifting-equipped bikes of the future.

Oli Woodman

Section Editor, UK
With more than 10 years of experience riding mountain bikes, Oli knows the good from the bad when it comes to gear. He's a total bike nerd and loves few things more than fettling with spangly riding bits. Also, he seems to have a talent for crashing hard but emerging unscathed.
  • Discipline: Mountain
  • Preferred Terrain: Loamy singletrack
  • Current Bikes: Marin Pine Mountain, Pinnacle Dolomite
  • Dream Bike: Honda RN01
  • Beer of Choice: Corona
  • Location: Bristol, UK

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