How Does Shimano Di2 Synchro Shifting Work? | Electronic Bike Gear Shifts Explained

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Smart electronic bike gears, how do they even work? Do they change from big to small ring without you asking, then change sprockets at the back. Well, it’s probably not news to you - but you have Shimano Di2 Synchro-shift gears. Mark thought it’s about time we did an explainer!

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Anyone get a new bike lately and find that the electronic gears just don’t work? Well, they do work, just not how you’re used to. In fact, you don’t seem to have any control over them! They change from big to small ring without you asking, then change sprockets at the back. What is going on?

Well, it’s probably not news to you - but you have Shimano Di2 Synchro-shift gears. Mark thought it’s about time we did an explainer!

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Category: Tech
Tags: di2, shimano di2, dura ace

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