4.5 hours on them. Great condition. Not a high wear item. TECHNICA SPRING TUBES: The spring tube secondary damping system is suitable for motocross usage as opposed to Supercross or high speed compression requirements. Technically, the damping force provided by a spring tube is LINEAR rather than PROGRESSIVE, so the higher speed damping that it provides tends to be less spiky or choppy as secondary damping kicks in. ENZO recommends the spring tubes for general motocross usage.