The ROCKSHOX 160 mm 27/29 Lyrik C1-C3 Yari B2-B3 Fork Spring Dual Position Air Kit is a high-quality spare parts kit designed for ROCKSHOX forks. This kit includes two different spring options – dual position air springs for an adjustable riding experience. The fork springs are 160mm in length and compatible with both 27.5 and 29-inch wheel sizes. The kit also includes a variety of color options for added customization. Whether you are looking to upgrade or repair your fork, the ROCKSHOX 160 mm 27/29 Lyrik C1-C3 Yari B2-B3 Fork Spring Dual Position Air Kit is a reliable choice for your cycling needs.