What Size Seatpost Do I Need? 27.2, 30.9 or 31.6 (+ Finder)
Your seatpost size is the post’s exact outside diameter to 0.1 mm. Here’s how to measure it, a size finder, and which dropper posts and shims exist for 27.2, 30.9, 31.6 and 34.9 mm.
Your seatpost size is the post’s exact outside diameter to 0.1 mm. Here’s how to measure it, a size finder, and which dropper posts and shims exist for 27.2, 30.9, 31.6 and 34.9 mm.