What’s Inside A Shimano STI Shifter? How Do STI Shifters Work?

Posted by on in Shifters


I show how a Shimano STI Bike Shifter (brifter) works on the inside. STI stands for Shimano Total Integration and it’s basically a brake lever and shifter integrated into one unit. These are found on modern road bikes. This a Shimano RSX left hand shifter (triple). The right hand shifter works the same way but with more increments.

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