Kogel Kolossos Ceramic Oversized Derailleur Cage

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Oversized Derailleur Cages

Ready to experience total drivetrain optimization? Introducing Kolossos, Kogel Bearing's ceramic oversized derailleur cage. 


Kolossos was designed to seamlessly fit and install on your  Shimano road rear derailleurs. There are many ways to describe Kolossos. Our favorite is "Mind Blown"!

Bigger IS Better

Oversized derailleur pulleys are all the rage nowadays. Big derailleur pulleys cause less deflection in the chain and slower rotations in the bearings.

Both lead to less friction and a more efficient power transfer between legs and wheels.

Kolossal Performance

Kogel’s goal was to build a cage so stiff that it holds the chain like a stock cage, while offering all the benefits of low drag oversized pulleys. 

Kolossos is 3x stiffer than the main competitor product and 2x stiffer compared to the original pulley cage on your derailleur.

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.


Kogel Oversized Derailleur Cages are:

  • 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!

About our Guaranteed Performance Warranty

Guaranteed Performance means working hard to make your experience with Kogel Bearings the best possible, every step of the way.

Kogel Bearings takes pride in delivering a best-in-industry warranty. Our 2-year warranty means you can feel confident and secure about your next two seasons of riding.

If a product fails in the first year, we will replace it. The second year requires an annual bearing service. A manual for that service can be found here.

Kogel Oversized Derailleur Cages Feature:

  • 2-year Guaranteed Performance Warranty on the cages, so you can feel confident and secure about your next two seasons of riding
  • 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.
  • SS (short) cage and GS (medium) cage fit and easy installation right out of the box.
  • Reduced drag associated with clutch derailleurs and 1x setups

How can I tell my chain is the right length for an oversized derailleur cage?

First of all: installing an oversized pulley cage requires you to switch to a longer chain. The long cage and large wheels demand extra chain links compared to the stock setup.

An oversized system uses a chain sold at retail at almost full length: 114 links, give or take a few, depending on your frame and chain ring setup.

The easiest way to set this up is to run the chain through the derailleur, over the smallest chain ring and smallest cog on the cassette. Leave the open ends at the bottom, just underneath the chain stay.

Next, measure the chain so it leaves a little tension in the chain. When you’re connecting the two ends of the chain, you can see the cage moving forward when it is starting to build up tension.

Running the chain at this length guarantees the longest chain for your setup, which means the lowest spring tension in your derailleur. Low spring tension equals low drag. (link to installation video when available)


No amount of chain lube or coating can eliminate your rear derailleur's inherent design limitations. The path a chain takes during each revolution requires passing through a chicane of derailleur cage pulleys diminishing your return on each pedal stroke. It's a drag on all geared bikes and why your stock rear derailleur will never perform as efficiently as one with an oversized derailleur cage.


Now imagine riding your bike with an oversized derailleur cage, less articulation in the chain means easier spinning: maximized silky-smooth power transfer from each pedal stroke to your rear wheel. Your chain flows through the rear derailleur effortlessly, almost like a single speed, but with gears.


Kogel’s oversized derailleur cages are your best option for maximizing drivetrain efficiency. Our entire line of silky-smooth bearing products offer exceptional value and guaranteed performance. Ready to experience your bike’s true potential?