Though rolling with a 1x system certainly simplifies your bike’s drivetrain and maintenance, developing the technology to make it possible certainly was not simple. It impacts every part of our drivetrain, and nothing becomes more important than chain retention. Everyone knows the irritation of a dropped chain when shifting your front derailleur, but how cruel it would be to drop a chain when you don’t even have a front derailleur to mess with! That’s where the SRAM X-Sync for 11-speed 1x drivetrains comes in. The sharp and narrow tooth profile as well as beveled edges help to prevent the chain from deflecting, while the mud-clearing recesses for the inner chain links and rollers help keep everything flowing nicely even in treacherously muddy conditions.