Features the extremely durable Solo Air spring system. The positive and negative air spring chambers are simultaneously filled to equal air pressures through a single Schrader valve. * Features external rebound, 3 position compression lever * Weight: 325g * Features Sag Gradients to properly set sag. with this feature, sag percentage gradients are provided on the shock making perfect suspension setup simple, easy and accurate. * Available in various compression tunes which are specific to your bike"s leverage ratios. High = 2.8+, Medium = 2.4-2.8, Low = <2.4