KS E20i Oil Pressure Cartridge

This cartridge is specifically designed for the E20i model with 170mm of travel. Because KS produces many variations, you must verify your specific model and travel length before purchasing to ensure compatibility.

Likely not. This cartridge is intended for standard aftermarket KS E20i units. Many bike manufacturers use proprietary versions of dropper posts that have different internal dimensions, so this part may not fit or function correctly in those systems.

This is strictly the oil pressure cartridge, which serves as the core internal mechanism for height adjustment. It does not include seals, bushings, or other external hardware required for a full service.

You typically need a replacement if your seatpost no longer holds its height, sags when you sit on it, or feels sluggish and inconsistent during operation. If the post won't return to full extension or stay locked, the internal oil pressure mechanism has likely failed.

Yes, you will need basic bike maintenance tools, including a strap wrench or soft-jaw vise to remove the seatpost collar, and potentially a specific tool to unscrew the cartridge from the head. Consult the KS service manual for your specific post model to ensure you have the correct tools before starting.