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. Fully compatible with traditional bikes and eBikes, installation is easy and fit is universal.
Key Features
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50mm Travel: Suspension comfort for smoother, more forgiving rides
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Stainless Steel Bushings: Durable, low-maintenance, and consistent performance
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Multiple Sizes: SP12 (27.2 / 31.6mm), SP25 (30.9mm)
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eBike & Traditional Bike Compatible: Versatile across all platforms
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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.
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- SP12/25 E-Bike rated
- 50mm of travel
- Stainless steel bushings
- 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 sold separately
- 7mm rail saddle rail clamp diameter
- 2 year manufacturers warranty included
- Made in Taiwan
Amazing post, added the red spring as I am over 200lb. Makes bumps much easier on my tush!
Best decision we made what a difference it m
This seatpost has worked really well on my Aventon Aventure. I use the bike off road with my 220 pounds and another 20-30 pounds of equipment. I purchased the heavier red spring for my weight, installation was very easy. A few short rides around the block and I had it all tuned in. A couple adventures into the woods since have been much more pleasant with the suspension sea post installed. Would definitely recommend it.
Does what it says it does.
Very happy with it so far. Seems like good quality, soaks up the bumps.