threespeed

Threespeed refers to a type of bicycle gearing system that offers three distinct gear ratios. These systems were very common on bicycles, particularly in the early to mid-20th century, and are still found on some utility, commuter, and vintage bicycles today. The "three speeds" are typically contained within a hub, most commonly a Sturmey-Archer type, though other manufacturers have produced similar designs.

The advantage of a threespeed hub is its simplicity and relatively low maintenance compared to derailleur systems. The gears are selected by a cable that actuates a mechanism inside the rear hub. This design protects the delicate gearing from dirt, weather, and damage, making it ideal for everyday use in various conditions. The three gears usually provide a low gear for easier climbing, a medium gear for general riding, and a higher gear for faster travel on flat terrain.

While modern bicycles often feature more complex derailleur systems with a wider range of gears, the threespeed remains a popular choice for its reliability, ease of use, and classic aesthetic. It is often found on city bikes, cruiser bikes, and bicycles intended for casual riding or commuting where simplicity and robustness are prioritized over a vast gear selection. The operation is straightforward, with a twist grip or lever usually mounted on the handlebar to change gears.