30.9mm post with a 2mm shim is a great option for bikes with 34.9mm seat tubes. This will save you a significant amount of weight. However, we can understand that some people don't like the thought of using a shim & that's why we make posts in all 3 popular diameters.
Feb. 9, 2022, 3:37 p.m. - oneupcomponents
30.9mm post with a 2mm shim is a great option for bikes with 34.9mm seat tubes. This will save you a significant amount of weight. However, we can understand that some people don't like the thought of using a shim & that's why we make posts in all 3 popular diameters.