Rockshox - Air Spring Upgrade Kit - Solo Air - Includes Refined Solo Air Assembly 4 Bottomless Tokens - Boxxer (2011-2015 Serial Number Later Than 16T11Xxxxxxx):

Solo Air is like a Buddhist monk. Its enlightened design lets you add air to your forks through a single Schrader valve, filling both the positive and negative air spring chambers simultaneously. So theyre always in perfect equilibrium, like Yin and Yang. Giving you a plush, predictable ride you can set up in seconds, with the lightest weight air spring on the market. Giving you a plush, predictable ride you can set up in seconds, with the lightest weight air spring on the market.