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

Maximum extension 300mm. Stock standard spring is rated for riders of 63.5 -81.6 kg. Installation height: 110 mm. Suspension travel: 48mm. Diameter: 31.6 mm. Base: aluminium version with brass bushings.

Bike Type: City Bike. Brand: SR Suntour. Material: Aluminum, Brass. Item Weight: 14.11 Ounces. Color: Black. Date First Available: June 22, 2017. Best Sellers Rank: #18,293 in Sports & Outdoors. Customer Reviews: 4.7 out of 5 stars 953 ratings 4.7 out of 5 stars. : B00BXPMJBY. Sport Type: ?53000 Cycling. Size: ?Size 31.6 x 350. Style: ?Sp12-ncx. Model Year: ?2019. Part Number: ?OX5-FTH-QUX. Manufacturer: ?SR SUNTOUR. Suggested Users: ?Unisex. Material: ?Aluminum, Brass. Color: ?Black. Model Name: ?SP12-NCX. Brand Name: ?SR Suntour. Item Weight: ?14.11 Ounces. Item Dimensions LxWxH: ?14.17 x 3.94 x 2.36 inches. Package Weight: ?0.85 Kilograms. Item Package Dimensions L x W x H: ?15.07 x 3.19 x 2.6 inches.