Shimano Di2 electronic shifting revolutionized the riding experience for professional and everyday riders alike when first introduced in 2008. It marked a significant milestone in the evolution of bike components, offering precise and reliable electronic shifting for the first time on a wide scale. Initially released with Shimano's top-of-the-line DURA-ACE R9070 series group, Di2 has since trickled down to ULTEGRA and Shimano 105 road groups. It is also available for offroad riders with Shimano's GRX gravel groups and XTR and XT mountain bike parts.
Each generation of Shimano Di2 components continues to push the boundaries of what was once thought impossible: even faster shifting, more reliable designs, and wireless communication between shifters and derailleurs. Shimano engineers continually look for ways to enhance the riding experience, and now they've focused on refining Shimano's Di2 satellite switches for improved shifting options across the system.
Satellite switches are not new for Di2. These small accessory shifters were introduced in 2013 and have often been called sprint shifters or climbing switches, depending on the type of switch and where riders placed them on their handlebar. They've gone through multiple updates with new features and designs and have helped countless riders shift easily while maintaining comfortable and secure hand positions while climbing, descending, or sprinting it out for the win.