Linked from
The 14 pages that link to Bicycle gearing, each with the reason it gives.
BicycleRelated: Gear choice lets riders trade speed for easier pedaling on climbs.
CyclingRelated: Gear ratios let cyclists trade speed for easier pedaling on climbs.
Bicycle chainRelated: Changing sprocket sizes alters the mechanical advantage of the chain drive.
Safety bicycleRelated: Gearing lets the rider adapt pedaling effort to speed and terrain.
GearsRelated: It applies gear-ratio changes to human-powered movement.
Gravel cyclingRelated: Wide gear ranges help riders manage steep climbs and variable terrain.
Recumbent bicycleRelated: Gear range helps recumbents handle starts, climbs, and fast riding.