Kolossos, derived from the Greek word for a statue much larger than its original subject, aptly describes this oversized derailleur cage. Replacing your stock pulleys with a ceramic 12-tooth top pulley and a 19-tooth bottom pulley, built on the stiffest cage available, enhances performance by reducing friction and improving shifting accuracy. This design also emphasizes gravel worthiness and chain retention. The Kolossos ST model offers the same stiff, oversized cage for crisp, accurate shifting and oversized pulleys to reduce drivetrain friction. It is equipped with high-quality stainless steel bearings, providing excellent durability and smooth performance at a more accessible price point.