SR SuntourSP12 NCX Seat Post 27.2X400mm

Got this for my wife who has back issues. The post's suspension system works smoothly. She hardly notices it while riding although I can see it working when we ride together on bumpy paved trails. I'm sure this is more gentle on her back than the lower grade OEM telescoping seat tube she had before. Had to adjust to softer setting to accommodate her low body weight. Installation was drama free. Robust design.

My new e-bike has a front suspension and low-pressure, wide tires, but still its bolt-upright riding position was giving my back "stingers' whenever I went hit a significant bump in the road. I felt it couldn't be good to subject my back to this daily for years. I considered a conventional spring seat post but those just do the annoying "bouncy-bouncy" for a couple seconds whenever you hit a bump. But this thing is like MAGIC...I don't know how they do it, but this just feels like riding on a cloud. All those familiar bumps on my commute to work, I just float over them now. I hesitated about the price, but this is hugely worth it.

The post fit perfectly into the bike and mounted to the seat perfectly as well. Once installed and adjusted (spring force), the new post definitely absorbs the bigger bumps in the road or trail. Seems well built.

Works great

I purchased a new ebike without shocks and adding this seat post was an excellent addition to dampening the bumps on the trails and roads. You would need to adjust the dampening level to your liking using an allen wrench. The only downside is the default spring is not rated beyond 200lbs, so beware, it may work for 200+ but may be a risk. I had to purchase the red spring which was rated higher just to be on the safe side.