I have a Trek Rail that suddenly started making a creaking/ticking noise while riding. I was thinking it was pivot related but I narrowed it down to something related to the saddle or dropper. I removed the dropper and the saddle and when I just push down on the dropper, I get the same noise. I will disassemble it and clean and re-grease, but I was looking up the price of a replacement cartridge just in case that was the problem. My post is a 170mm. In the service document it lists the part # for the 100mm, 150mm, 170mm and 200mm. When I go to the Trek website, there is no mention of the 170mm. There have the 170mm for the 31.6 but not the 34.9. It isn't listed for sale nor is it listed in the specs table. Do you just have to buy a new dropper if the cartridge goes bad for the 170 size?
by elsalty357