Kogel Kolossos Oversized Derailleur Pulley Cage (Shimano RX800) Gold

Kolossos - it’s all in the Name
Kolossos is the Greek word for a statue, much larger than the original subject. Seems fitting for an oversized derailleur cage with a 19 tooth bottom wheel. Besides reduced friction, this cage is built with shifting accuracy, gravel worthiness and chain retention in mind.

Compatibility
This model is built for the GRX 2X (RD-RX810) and Ultegra RX800 series derailleurs. This includes mechanical and Di2.
This cage fits on the GRX 1x derailleur (RD-RX812) and will allow to shift through the entire range on an 11-42 cassette, but it will leave a large spacing between the top pulley and the smaller cogs. Expect shifting to be less snappy in these three gears in a 1x setup.

Why Upgrade/Replace Your Derailleur Cage?
Many oversized pulley systems are plagued with vague shifting due to the lack of stiffness of the components. Plus, your stock derailleur's efficiency is limited by the size of the factory derailleur pulleys.

Standout Key Features
• Built to offer low friction while maintaining shifting accuracy.
• Built for road as well as off-road use, we are not here to restrict your adventures
• Engineered with a long-tooth profile on lower pulley for better chain retention.
• It's basic physics. You ride slower though sharp turns and faster though wide ones. Well, your chain flows faster around larger pulleys and slower around smaller ones. Bigger really is better...and faster!

• 2-year Manufacturer's Performance Warranty on the cages
• Design offering low friction AND shifting accuracy
• Long-tooth profile on lower pulley for better chain retention
• Chain catcher on lower pulley to prevent chain jams
• No limits on-road and off-road compatibility
• Cage fit and easy installation right out of the box
• Reduced drag associated with clutch derailleurs and 1x setups