RedShift Sports has released the ShockStop Seatpost, a coil spring powered suspension seatpost that works on a four-bar linkage system and promises to smooth out gravel and reduce fatigue.

Update: Be sure to check out our review of the Redshift in our suspension seatposts Gear Index.

In 2015, Redshift Sports, a Philadelphia-based cycling brand, created the ShockStop Suspension Stem, designed to thwart fatigue on gravel and road bikes by adding a little compliance and suspension to the front end of the bike. Today, they’ve announced the ShockStop Suspension Seatpost.

According to Redshift, the ShockStop Seatpost’s unique design was born from experience engineering suspension systems for heavy duty off-road equipment. “It is equally suited for gravel adventure or dealing with potholes on your daily commute,” adds the company.

Redshift ShockStop Seatpost, suspension seat post
  • Redshift ShockStop Seatpost, suspension seat post
  • Redshift ShockStop Seatpost, suspension seat post

The Shockstop Seatpost will come in one size, 27.2mm x 350mm, which tips the scales at 497 grams. Compared to the Cane Creek Thudbuster, the other popular suspension seatpost on the market, the ShockStop Seatpost has about 2mm more travel and is about 8 grams heavier than the 27.2mm XL Thudbuster. While they may seem similar on paper, they’re quite different in operation. The Cane Creek post uses a rubber elastomer, while the Shockstop utilizes an internal coil spring to apply force on the seatpost’s four-bar linkage. Redshift alleges that their post suspends the rider’s body, isolating them from bumps on the road and allowing the bike to move under the rider as it encounters uneven terrain. Consequently, this reduces the accumulated effects of such bumps and vibrations by up to 60%.

The four-bar linkage keeps the saddle angle constant through the full travel of the suspension. In addition, each post includes four different coil springs that can be interchanged within the post’s tube. This allows riders to fine tune the spring rate and preload to suit their own personal preferences, specific riding style, and the terrain.

ShockStop Seatpost Specs

  • Diameter 27.2mm (shims available for larger seat tube diameters)
  • Suspension Travel 35mm
  • Length 350 mm
  • Weight 497 grams
  • Rearward Offset at 25% Sag 10mm
  • Rearward Offset Range 0 to 22mm
  • Maximum Rider Weight 110 kg
  • Material 6061 T6 Aluminum
  • Production Process 3D forging and 5-axis CNC machining
  • Color/Finish black anodized

The Shockstop Seatpost is available for pre-order starting today for $129 via their Kickstarter campaign.



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