Made to save watts through reduced drivetrain friction, promote smooth shifting and look great with the rest of your bike components, the Kolossos ST Oversized Pulley Cage offers the benefits of the Kolossos, at a more competitive price, by using high quality, smooth, durable stainless steel bearings.

These replace the premium ceramic balls found in the Kolossos Speed, but retain the same super-hardened races, which promote longevity and smooth running of the ball bearings. The oversized cage, oversized pulleys and choice of seals all remain to improve shifting. You can select Road and Cross seals, for maximum drag reduction or maximum protection against debris, depending on whether you typically ride on or off-road.

The aircraft grade aluminium cage combines drivetrain precision with efficient power transfer, while the large top pulley and still larger bottom pulley, with their long teeth, decrease friction and reduce chain articulation, which means less chance of chain drop and more speed with less effort. It's available in several anodised colourways, to best suit your bike's aesthetics.

Marginal gains are important to anyone who chooses to race, but for those not looking to gain the fractions of a second that are critical in high level racing, the stainless steel bearings of the Kolossos ST Oversized Pulley Cage offer almost the same performance benefits as those of the original Kolossos, with just a minor drop in friction reduction. The Kolossos ST will therefore help you to perform at the top of your game.

Kogel Lifetime Limited Warranty

Kogel's new extended warranty picks up where your “Very Few Questions Asked” Warranty ends. Once this initial two- or three-year coverage finishes, the Lifetime Limited Warranty will cover you if your bearing wears prematurely under normal riding conditions or shows signs of a manufacturing defect, giving you peace of mind that your exceptional ride experience will continue. For more information, see our Lifetime Limited Warranty guide.

• A custom, oversized derailleur cage for your derailleur
• With high quality, stainless steel pulley wheel bearings with hardened stainless steel races
• Built for Shimano 11 and 12 speed groupsets, also SRAM AXS groupsets
• Reduced chain articulation means reduced drivetrain friction and improved energy transfer
• Aircraft grade aluminium cage for shifting precision
• Lower pulley wheel designed with a long tooth profile for improved chain retention
• Derailleur not included
• Installation requires replacing your chain to accommodate larger pulleys
• Also requires disassembly of the stock cage