Butted tubing is bicycle frame tubing with varying thicknesses of walls: thicker at the ends for increased strength and thinner in the center for lightness.
This technique assists frame makers in producing light yet rigid frames. It is predominantly employed in aluminum and steel frames. Butting enhances the performance of frames by stiffening areas of increased stress, such as joints, while leaving other areas lighter. This results in greater responsiveness, efficiency, and riders’ comfort when riding over long distances. Double and triple-butting of tube structures is normally employed for performance bikes in long-distance road racing as well as gravel competitions.
