22.2mm

ANSWER BMX seat post extenders kits are available in 22.2, 26.8 & 27.2mm with four color options. All three sizes come with a quick release sea...

The Avian Carbon Pivotal seat post features a full carbon post with alloy Pivotal seat mount. SPECS: Three sizes: 22.2mm, 26.8mm and 27.2mm Glos...

PRODUCT DETAILS Crupi’s Pivotal seat posts are lighter in weight than traditional posts and a much more simple seat installation process....

The Crupi Seatpost Extender lets you raise your current seat position to cool off after a grueling race, or cruising your neighborhood. Includes ...

CS Seat Post Extender for cool downs and great for riding on your trainer comes in 27.2 and 22.2 

PRODUCT DETAILS SPECS: STYLE: Pivotal design for Pivotal seats THREE SIZES: 27.2mm. 26.8mm and 22.2mm LENGTH: 11.8"/300mm for 27.2mm and ...