Kogel Kolossos Oversized Pulley Cage Black / Shimano RX800

Greek for a statue that is larger than the original, Kolossos is a fitting name for this oversized pulley cage.

Designed to deliver maximum drivetrain performance, the Kolossos Oversized Pulley Cage will enable you to go faster with less effort. It does so by introducing lower drivetrain friction, for improved shifting accuracy and better chain retention.

That's because it pairs an incredibly stiff, aircraft grade aluminium cage, which combines drivetrain precision and power transfer, with two oversized pulleys, a large top pulley and an even larger bottom pulley. The chain articulation is reduced due to the larger pulley wheels decreasing drivetrain friction, for a smoother ride and improved energy transfer from the pedal to the tarmac.

The engineering of the pulley wheels doesn't stop there, since the long tooth profile on the lower pulley gives better chain retention where you need it.

Designed for World Cup use, the Kolossos Oversized Pulley Cage is available in a wide range of colours, allowing you to customise each individual component and make your bike look as individual as those ridden by the pros.