Columbus Zona ext. butted seat tube for dropper post - 32.7 OD (31.1 ID) - .7/.5/.9 - length = 550
sku # ST-ZON113550002
Columbus Tubing Zona externally butted seat tube - 32.7 dia - .7/.5/.9 wall thickness - length = 550 - steel
With a 31.1 ID, this tube will work with most 30.9 dropper posts. It also has a really long lower butt (245mm) so you've got room to work with if you want to use it in a smaller frame.
276g - Weight is based on a representative tube. Actual weight may vary slightly.
Please see tube graphic in image gallery for dimensions.