Designed for the most drop with the least weight, 32J Air features a lightweight alloy air cartridge shaving grams and adding rebound adjustment to create our premier high-performance dropper post. The 32J features adjustable air with 7075 aluminum alloy construction, upgraded ...Designed for the most drop with the least weight, 32J Air features a lightweight alloy air cartridge shaving grams and adding rebound adjustment to create our premier high-performance dropper post. The 32J features adjustable air with 7075 aluminum alloy construction, upgraded internal bushings, and a hard anodized stanchion, all designed for long service life without side-to-side movement as the season wraps up.