KOLOSSOS OVERSIZED DERAILLEUR CAGES
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Description
Elevate your drivetrain with the Kogel Kolossos—our flagship oversized derailleur cage engineered to squeeze every last watt out of your ride. Crafted from precision CNC‑machined aluminum, the Kolossos features high‑flow, low‑friction ceramic pulleys housed in sealed labyrinth bearings, reducing drag by up to 30% versus a standard cage. The result? Sharper, more reliable shifts under load and a drivetrain that spins smoother and lasts longer.
Every detail of the Kolossos is optimized for performance: the oversized pulley geometry improves chain wrap and tension, keeping your chain firmly in place through sprints, climbs, or rough terrain. Its stiff yet lightweight construction strikes the perfect balance between durability and weight savings, making it an ideal upgrade for road racers, gravel grinders, and mountain adventurers alike.
Installation is straightforward—simply swap out your stock cage for the Kolossos and feel the difference immediately. Whether you’re chasing KOMs, setting up a gravel epic, or logging daily miles, the Kolossos delivers consistent, whisper‑quiet operation and extends the life of your cassette and chainrings. Upgrade to the Kogel Kolossos and experience the next level of drivetrain efficiency.
I’ve been using the Kolosos, and BB for an year now, they still perform as it they were brand new!!! Shifting improved and going downhill with other people is where you will really see the ceramic bearings do their thing!!!
The Kolossos is definitely my favorite upgrade on my Orbea Occam. It shifts a lot smoother and it looks RAD! I went with a black cage, gold pulleys, & oil slick bolts. It's really cool how you can customize it to your bike. Highly recommend!
The setup has worked so well for me, it’s almost shocking. The hike is a hardtail, and despite this, I’m able to run the derailleur with the clutch off for all my off-road riding, without chain drops. So I get extra drag reduction! I also have to powershift a lot on my local terrain, and it always works. The claimed stiffness is real. Love it!
Much stiffer than my stock cage and looks way better!
Experience a silky smooth drivetrain
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.
LEARN HOW TO INSTALL YOUR KOLOSSOS
Installation is easy, but does require disassembly of the stock cage.
The process takes roughly 20 minutes, including minor adjustments to the B-screw and limit screws to fine tune placement on the bike.
Frequently asked questions
How hard is it to install an Oversized Derailleur cage?
Installing an oversized derailleur cage is best left to expert level mechanics. Derailleur manufacturers do not support disassembly of the derailleur. For this reason online instructions will be limited.
The installation procedure is also different for each model. Some types are straight forward, with some types you need to disassemble the entire cage and use proprietary tools for the installation. With others you run the risk of having to rebuild the clutch if the parts pop out while you’re happily tooling away. Derailleur failures are typically expensive: the chances of breaking a wheel or a seat stay are probably not worth the risk.
Kogel recommends leaving the installation to a professional.
Will my existing chain work?
It depends on the model. Typically Kolossos for road derailleurs require a slightly longer chain than the stock cage. If your derailleur was built for a 1x setup, typically the upper pulley is off set from the pivot point and we can design it in such a way that you can use the same chain length.
Will I notice a difference in performance?
Yes and No. Kolossos has been designed to shift just as accurate as your stock derailleur cage. You will notice reduced drive train friction. Upgrading to an oversized derailleur cage is one step in the eternal search to go faster with less energy.
Are Oversized Derailleur cages loud?
The only sound you will hear is from using aluminum wheels instead of plastic. Aluminum wheels are stiffer and more durable than their plastic counterparts at the expense of a faint rattle when the chain runs across the cogs. We like to call it the sound of speed.
What are the downsides to an oversized derailleur cage?
- Some installation requires a new chain
- Slight reduction of ground clearance on road bikes. Gravel and MTB Kolossos are the same length as the stock cage
- Your friends will envy you
