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.

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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 sold separately
7mm rail saddle rail clamp diameter
2 year manufacturers warranty included
Made in Taiwan

E-Bike Highlights

NCX Seat Post

MOBIE A32 DS NLO 15AH2 27.5

Mobie34 CGO Boost 15AH2

SF26 MOBIE34 BOOST EQ 2CR DS 15AH4 29

SF26 MOBIE34 BOOST EQ 2CR DS 15AH4 27.5

SF25 MOBIE34 D AIR 2CR DS 15AH2 27.5