KS E20i Oil Pressure Cartridge

This specific cartridge is designed exclusively for the KS E20i dropper post model. Before purchasing, check your seatpost's model name, which is typically laser-etched on the collar or the lower tube, and confirm it matches the E20i designation.

No, you cannot change the travel length of your dropper post simply by swapping the cartridge. The internal structure and outer tube length of your post are fixed to a specific travel distance, so you must replace the cartridge with one that matches your post's original travel specification.

You likely need a replacement if your seatpost is sagging under weight, failing to return to full extension, or feeling 'mushy' when you sit on it. These symptoms usually indicate that the internal seals have worn out or the oil pressure system has lost its charge.

Replacing the cartridge is a moderate-level task that requires basic bike maintenance tools, such as a strap wrench and a set of hex keys. If you are comfortable performing standard suspension or dropper post maintenance, you should find this straightforward, but always consult the official KS service manual for your specific post model.

Yes, this is a sealed, self-contained unit. It comes pre-filled and pressurized from the factory, so you can install it directly into your post without needing to bleed the system or add hydraulic fluid.