SR-Suntour SP12 / SP17 NCX suspension seat post. Spring seat posts are an alternative to the spring-loaded rear wheel, which lowers the saddle well when sitting on. While driving, the seat height changes only slightly. The high-quality seat posts give you noticeably extra comfort on uneven surfaces. Suntour Parallelogram System. Note: The bottom of seatpost has adjusting screw which can control the suspension.
Base: aluminium version with brass bushings.
Diameter: 31.6 mm.
Suspension travel: 48mm.
Installation height: 110 mm.
Maximum extension 300mm. Stock standard spring is rated for riders of 63.5 -81.6 kg
