Kogel Bearings

Speed Kolossos Oversized Pulley Cage - Shimano RX800

The Kogel Speed Kolossos Oversized Pulley Cage for Shimano RX800 is engineered to deliver maximum drivetrain efficiency without compromising precision or durability. Designed for riders who demand smoother shifting and reduced friction across every mile, this oversized cage transforms the performance of a Shimano RX800 derailleur—on the road, on gravel, and everywhere in between.

With ceramic ball bearings spinning in steel races and sealed with Kogel’s road seals, this pulley system minimizes drag while keeping contamination out. The long-tooth lower pulley enhances chain retention over rough terrain, while the latest Kolossos design is stiffer than ever, offering consistent power transfer for all-day reliability. Despite the added stiffness, the weight remains impressively low for a setup that’s built to perform under pressure.

• Ultra-low friction design for smoother, more efficient power transfer
• Ceramic bearings with steel races ensure long-lasting precision and minimal maintenance
• Long-tooth lower pulley improves chain stability across bumpy or uneven terrain
• Increased stiffness with no weight penalty for confident gravel and road performance
• Optimized for Shimano RX800 derailleurs to deliver pro-level shifting performance

For riders chasing every watt or simply looking for a drivetrain that feels as fast as it looks, the Kogel Kolossos Oversized Pulley Cage is a serious upgrade that pays off with every pedal stroke.