272 droppers will be external cable models only covert will not be an option 5 inches125mm of travel 430mm in overall length thats 30mm longer than the 309316 droppers and is volume to accommodate more nitrogen 272 is small enough that packaging everything you need inside the smaller tubes is an issueyou want the increased control a dropper post gives you but you had to give up your thomson post to have it not any longer you can put your thomson post back on the bike our cartridge b