Upgrade your Sram Eagle drivetrain with supreme shifting performance and reduced friction. The Kolossos ST features an 18-tooth narrow-wide bottom pulley and 14-tooth top pulley on our stiffest cage yet, replacing your stock 12 and 14-tooth pulleys.
Built with high-quality stainless steel bearings, the Kolossos ST delivers crisp, accurate shifting and excellent chain retention for XC, marathon and enduro riders. Ground clearance remains virtually unchanged—within 2mm of stock length without hanging lower.
Ships with road seals for maximum efficiency, with cross seals available for wet conditions.
Fitment: Compatible with all mechanical and AXS versions of XX1 Eagle, X01 Eagle and GX Eagle rear derailleurs. Does not fit non-Eagle (11-speed) or T-Type Eagle derailleurs.
Kolossos ST: Performance Without the Premium
Introducing the Kogel Kolossos ST, the perfect balance of performance and value in an oversized derailleur cage. Designed for riders who want the benefits of reduced drivetrain friction and improved chain stability—without the premium price tag—Kolossos ST delivers smooth, efficient shifting in a sleek, refined package. With a CNC-machined aluminum cage for durability, precision-engineered hybrid ceramic bearings, and an optimized design for modern road and gravel bikes, Kolossos ST is built to perform. Whether you're pushing watts on the road or tackling mixed terrain, this is the upgrade that brings efficiency within reach. Ready to ride faster and smoother?
