SR SUNTOUR NCX Suspension Seatpost Ride Further. Feel Better. Comfort That Lasts. The timeless SR SUNTOUR NCX suspension seatpost is engineered to bring long-lasting comfort and control to every ride — whether you're on pavement, gravel, or trails. Built for performance and trusted worldwide, it's the go-to upgrade for cyclists who demand more from their saddle. Performance Where It Counts With 50mm of smooth travel and stainless steel bushings, the NCX seatpost reduces road buzz, trail chatter, and harsh impacts — making it the perfect solution for alleviating back pain, saddle fatigue, and rider discomfort. One Design, Two Models Choose the SP12 (available in 27.2mm and 31.6mm) or the SP25 (available in 30.9mm) — both deliver the same performance and ride quality, with a minor variation in linkage design. Either is fully compatible with traditional bikes and eBikes, installation is easy and fit is universal. Key Features 50mm Travel: Suspension comfort for smoother, more forgiving rides Stainless Steel Bushings: Durable, low-maintenance, and consistent performance Multiple Sizes: SP12 (27.2 / 31.6mm), SP25 (30.9mm) eBike & Traditional Bike Compatible: Versatile across all platforms Class-Leading Comfort: A proven upgrade for reducing rider fatigue Upgrade your ride with the seatpost trusted by comfort seekers worldwide.SR SUNTOUR NCX — your back will thank you.   Amazon & eBay Counterfiet Seat Post Warning! Click Here   SP12/25 E-Bike rated 50mm of travel 25mm offset saddle clamp Patented parallelogram suspension design Preload adjustable  Internal coil spring for the ultimate in comfort Side clamp has a radial detent with wide tilt adjustment range Requires 110mm of exposed seat post to the saddle rails to fit bike Maximum extension of 300mm height for 350mm length Maximum extension of 350mm height for 400mm length Stock standard spring is rated for riders of 140-195lbs +/- Optional hard and soft springs sold separately  Optional cover sol