ANNIVERSARY SALE—-The First Ten Customers each day(washington time GMT-4) will get an Extra 15% Discount!!
ShockStop Seatpost is an adjustable-stiffness suspension seatpost that smooths out your ride. It is equally suited for an epic gravel adventure or just dealing with potholes on your daily commute.
The ShockStop Seatpost is an adjustable-stiffness suspension seatpost that will dramatically improve your ride by smoothing out the road. It is equally suited for an epic gravel adventure or just dealing with potholes on your daily commute.
You can adjust the spring rate and pre-load to match your specific riding style.
And with 35 mm of suspension travel, it’s perfect for all types of riding: gravel / CX, e-bike, commuter, city, road, and even mountain.
Rough roads and trails are everywhere – you’ll encounter them no matter where you ride. Modern bikes are designed for speed and efficiency, not comfort. Bumps and impacts are passed straight to the rider, leading to fatigue, pain, and even injury.
The ShockStop Seatpost suspends your body, isolating you from the imperfections of the road and trail. We optimized the travel and suspension kinematics to provide a plush, bottomless feel.
Typically, adding comfort to your bike meant sacrificing performance. The ShockStop Seatpost lets you ride faster and more efficiently by keeping you stable and allowing the bike to absorb rough terrain. This means you spend more time putting power to the pedals and less time bracing for impacts.
The ShockStop Seatpost is the rare product that increases comfort AND performance.
The ShockStop has an internal spring which applies force on the seatpost’s four-bar linkage, which in turn suspends the saddle and rider. As you ride, the seatpost allows the bike to move under you as it encounters uneven terrain, which reduces the accumulated effects of bumps and vibrations by up to 60%. The four-bar linkage ensures that your saddle angle remains constant through the full travel of the suspension.
Using accelerometers in the lab and on the trail, we were able to accurately measure the direction and magnitude of impact forces transmitted to the rider. With that data, we optimized the travel of the ShockStop suspension mechanism to absorb as much of this impact energy as possible while minimizing the influence on the pedal stroke.
The suspension mechanism of the ShockStop Seatpost can be precisely tuned to match your riding style. First, a user-selectable in-line coil spring means a wide range of riders can take full advantage of the shock-absorbing benefits.
Then with the right spring in place, the adjustable preload allows fine tuning of the responsiveness without sacrificing any suspension travel.
The ShockStop Seatpost uses advanced manufacturing techniques, such as 3D forging, to integrate the suspension into a sleek design that fits compactly below the saddle.
Whether you’re looking to just take the edge off the cracks in the road, or completely mute the gravel, the ShockStop Seatpost is the perfect solution.
Yes, you can! It takes just a couple minutes and requires only standard bike tools.
The ShockStop Seatpost will fit any bike that has a round seatpost 27.2mm in diameter or greater (the vast majority of bikes). If your bike has a seatpost that is larger than 27.2mm in diameter, inexpensive shims can be used to make it fit perfectly.
Bikes that have non-round seatposts (some triathlon or aero road bikes) or seatposts smaller than 27.2mm (rare) are not compatible.
At 350mm length, the ShockStop can be inserted with as little as 90mm exposed above the seat tube collar, or as much as 275mm exposed.
We designed the ShockStop Seatpost to be the perfect complement to the ShockStop Stem. They both take what was previously a rigid connection between the rider and the frame and add just the right amount of compliance without sacrificing control or efficiency. Together, they create a suspension system that will have you cracking a smile and choosing the cobble stone route – just because you can. But as much as we love the stem, we think our backers say it best…
Frequently Asked Questions:
- Is the stiffness adjustable?
Absolutely – We designed the ShockStop Seatpost so that you can adjust it to perfectly match your weight and riding style. Before your order ships, we’ll send out a BackerKit Survey to collect information about your order. In that survey, you’ll select a specific spring installation based on your body weight (don’t worry, we’ll provide plenty of guidance). The selected spring will be come pre-installed in the seatpost. Next, you’ll use the preload adjustment knob at the bottom of the seatpost to adjust the spring preload – the amount of force required to cause the saddle to start moving. Together, the stiffness and preload allow you to dial in the feel to your exact preference.
- Will the spring need to be replaced?
No, the spring is designed to last the lifetime of the seatpost. We’ve tested the performance of the springs extensively and selected the geometry and material of the spring specifically to withstand the rigors of daily riding without degradation.
- How many springs do I get?
The seatpost ships with one spring of your choice. Before your order ships, we’ll send out a survey to collect information about your order. In that survey, you’ll select a specific spring installation based on your body weight (don’t worry, we’ll provide plenty of guidance). The selected spring will be come pre-installed in the seatpost. If, in the future, you decide that you want to try a different stiffness spring, we will have other spring stiffnesses available for purchase at a substantial discount for backers.
- What is the minimum installation height?
The ShockStop Seatpost requires at least 90mm from the top of the seat tube collar (the part on your bike that holds the seatpost in place) to the center of the saddle rail in the saddle clamp.
- What is the warranty?
We stand behind every product that we sell, and we pride ourselves on the quality of our products, as well as the support that we provide to our customers. Redshift Sports warrants that all of our products are free from defects in material and workmanship for two years from the date of original retail purchase.
- How is the product tested?
The seatpost is tested to the latest ISO 4210 standard for Racing & Mountain Bicycles. These standards typically specify “Static Strength” tests (i.e. one-time application of force) as well as “Fatigue” tests (i.e. repeated application of force) for different bicycle components.
We also run our own independent tests to better understand lifespan which typically involve cycling well beyond the specifications in the ISO 4210 standard.
- How does it hold up to mud and sand? Will you offer a rain/dirt cover?
The internal mechanism uses custom SKF seals to provide a robust barrier to mud, grit and water. They come from the same family of seals that you see on mountain bike front fork suspensions. While we expect these to hold up to heavy off-road usage, this will be a user-serviceable part if the need should arise.
We are confident in the seal design, but we have receive enough questions about a cover that we will consider offering this an add-on option.
- Will my saddle bag fit with the ShockStop Seatpost?
Most standard strap-based saddle bags will fit the ShockStop Seatpost without issue. If your saddle bag uses rigid clips, clamps, or some other inflexible attachment method, it’s possible that your bag may not be compatible.Will this work for bikes with 25.4mm seat tubes like the Cannondale Synapse?
Unfortunately, no, the ShockStop Seatpost will only fit bikes that have seatpost diameters of 27.2mm or larger.
- Will this work for aero seatposts/Trek seat mast?
Unfortunately, no, the ShockStop Seatpost only fits standard round seatposts that are 27.2mm or larger in diameter.
- Will the seatpost work with 7mm x 9mm carbon saddle rails?
Yes, we will offer a 7mm x 9mm compatible saddle clamp as an add-on option that will be available in BackerKit after the campaign completes.
- Is the ShockStop compatible with a Di2 battery BT-DN110?
Yes, the seatpost is compatible with mounting a Di2 battery – we’re developing a ShockStop-specific mounting option and that will be offered as an add-on option in BackerKit after the campaign is complete.
- Will the ShockStop fit in bikes with seatpost diameters larger than 27.2mm?
Yes! The ShockStop will fit any bike with a seatpost diameter of 27.2mm or larger. We will be offering inexpensive shims as an add-on option in BackerKit after the campaign is complete. Shim sizes include 28.6, 29.8, 30.9, 30.9, 31.6, and 31.8 mm.
- Is the ShockStop Seatpost compatible with my folding bike?
The ShockStop Seatpost is 27.2mm in diameter and 350mm long. Typically, folding bikes use very long seatposts in larger diameters. But, many folding bikes come with and can work with telescopic seatposts. These allow you to use a standard seatpost like the ShockStop by adding an extension that fits into the bike and accepts the standard seatpost. Check with you local bike shop or bike manufacturer to see if one of these is available and if it accepts 27.2mm seatposts.
- If I order the ShockStop System, when will I get the Stem?
Your ShockStop Stem will ship with the Seatpost. If you’d like to get the ShockStop Stem earlier, we will offer an add-on shipping fee option.
- Is there any damping in the System?
Damping is important for MTB because you’re trying to absorb larger amplitude impacts. For high-frequency, small amplitude perturbations, it’s better to have a very lightly damped system to maximize responsiveness. The plunger seals provide enough damping to prevent unwanted movement of the post, but otherwise, the system is free to respond quickly.