Last Updated: April 28, 2026 A “granny gear” is the smallest chainring on a bike’s drivetrain, paired with the largest cog at the rear — the easiest gear available, used for very steep climbs. The term comes from triple-chainring road bikes of the 1980s–90s, where the inner ring (typically 30 teeth) was small enough that … Continue reading What Is A Granny Gear On A Bike – And How Should You Set One Up?