Aftermarket spring kit for NCX Seat Post
Soft Blue spring is rated for 140lbs- or less
Hard Red spring is rated for 180lbs+ or more
Compatible with all sizes of SR Suntour seat post
Quick and simple installation video below
https://www.youtube.com/watch?v=yRmQYUmnusg&feature=emb_logo
*medium springs are factory installed on all post sold by SR Suntour North America
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