Compared with hook-type rims, Giant’s new hookless design has a wider inner rim width, allowing a smaller, lighter tire to have the same volume as a larger, heavier tire, resulting in a lighter overall weight.
Giant’s hookless rim design is realized through an innovative manufacturing process that results in a more continuous carbon fiber structure. This process enhances durability and increases impact resistance with no weight penalty.
Hookless rims help create a more round tire shape that provides superior grip and handling as well as added sidewall support when cornering.
Without the rim hook to “push” the tire bead inward, Giant's hookless rim design offers a more seamless airflow between the tire and the sidewall of the rim, resulting in less drag and improved aero performance when compared to standard hook-type rims.