ShockStop Seatpost: Add Suspension to Your Bike

Created by Redshift Sports

An adjustable-stiffness suspension seatpost that smooths out your ride; perfect for gravel, road, commuter, mountain, and e-bikes

Latest Updates from Our Project:

Sea Otter Recap & Products We Love
9 months ago – Thu, Apr 26, 2018 at 10:31:10 AM

Backers - 

We had a great time at the 2018 Sea Otter Festival! Thanks to everyone who stopped by to test out the seatpost on our roller-bump-torture-device (see video below). It's always a pleasure to meet our backers in person, and the response to the seatpost was amazing! Scroll to the bottom for a full slideshow of pictures from the festival.

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Sea Otter reminded us that there are lots of cool bike products out there. We thought we would do a short rundown of some great bike Kickstarter projects that we think are worth checking out. 

Quoc GT Gravel Shoe

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If you are thinking about some new shoes, check out theGT Gravel Shoe from Quoc. These guys have been making great shoes since 2009 and their newest addition is pretty awesome. Pre-order it now while their campaign is still on or check out their site to see the whole line.

Mineral Design Mini-Bar Bike Tool

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We love this tool! It's simple, compact, versatile and never leaves our side. And what makes it even better is that it's made by our good friends and Philadelphia neighbors Justin and Mike at Mineral Design. The tool was born on Kickstarter back in 2016 and has been getting rave reviews ever since (and not just from us). We all carry one when we ride and always have one in our shop - do yourself a favor and pick one up.

Stomp Pump - bike foot pump

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We had a chance to meet up with Woody (one of the creators) to check this out at Sea Otter. Stomp Pump is a portable foot pump that can be stored on the bike. While it may be small enough to mount on the bike, it's still powerful enough to easily inflate your tires. Check out their campaign here.

More Sea Otter Pictures

Packing gear into the festival
Packing gear into the festival
Tents, tents, tents!
Tents, tents, tents!
Out in the sun too long...
Out in the sun too long...
Racers fly around the Laguna Seca track
Racers fly around the Laguna Seca track
Gotta start em young
Gotta start em young
Red anodized ShockStop Stems. For Display Only :)
Red anodized ShockStop Stems. For Display Only :)
Sea Otter Sunset
Sea Otter Sunset

 Thanks,

Redshift Team

Amazing 1st Week & Sea Otter Classic
9 months ago – Fri, Apr 20, 2018 at 10:29:28 PM

Hi Backers,

What an amazing 1st week for the ShockStop Seatpost! It's hard to put into words how much your support means to us. Thanks to all of you, this has already become the most successful Redshift campaign yet.

Team photo after filming some epic gravel riding
Team photo after filming some epic gravel riding

In other exciting news, we'll be attending the Sea Otter Classic, a huge bike festival held in Monterey, California (April 19-22). If you're racing or coming to the expo, come by booth 274 and say hi. We'll have the seatpost on display and available to try out.

We've been blown away by your amazing support and are so excited to get the seatposts manufactured and into your hands. The campaign still has a long way to go, so please help us get the word out and keep the great momentum going.

Thanks,

The Redshift Sports Team

How does the ShockStop Seatpost Compare to Other Suspension Seatposts?
9 months ago – Thu, Apr 19, 2018 at 10:04:14 PM

During the development of the ShockStop Seatpost, we logged hundreds of miles on basically every type of suspension seatpost on the market. We figured out what we liked and what we didn't. Then we rolled our experience into the design of the ShockStop Seatpost.

L to R: Suntour, BodyFloat, ShockStop, Thudbuster, CG-R
L to R: Suntour, BodyFloat, ShockStop, Thudbuster, CG-R

Here's how the ShockStop compares to a few of the better-known suspension seatposts on the market today.

  • Thudbuster ST
  • Kinekt BodyFloat
  • Suntour NCX
  • Specialized CG-R

ShockStop vs. Thudbuster ST

ShockStop (L) vs. Thudbuster (R)
ShockStop (L) vs. Thudbuster (R)

The ShockStop and Thudbuster have a lot in common - both utilize linkage-based designs with approximately 33-35mm of travel, and both weigh just under 500g. However, there are a couple of important differences between the two designs:  

  • Appearance - Bicycles are sleek, elegant machines, and we believe that adding comfort should not mean sacrificing aesthetics. One of our primary goals with the ShockStop Seatpost was to create a sleek, understated design that matches the visual design of modern bicycles. Admittedly, beauty is in the eye of the beholder, but we think that internalizing the spring element and minimizing the visual bulk of the mechanism allows the seatpost to maximize both form AND function. 

  • Adjustability - In order to adjust the stiffness of the Thudbuster, you swap out different durometer elastomers. However, there is no preload adjustment, and the gaps between elastomer stiffnesses are relatively large. That means you’re stuck with one of three stiffnesses. The ShockStop Seatpost allows you to change stiffnesses by swapping out springs, but it also includes continuous preload adjustment. That means that, with a given spring installed, you can precisely adjust the feel of the seatpost to match your weight and riding style.

  • Suspension Feel - The elastomer suspension elements of the Thudbuster are sandwiched in between the linkages, meaning that the stiffness of the suspension ramps up very quickly as the suspension compresses. That means that the suspension feels relatively stiff, and in practice, it’s virtually impossible use the full 33mm of stated suspension travel. With the ShockStop, the suspension stiffness ramps up much more slowly as the suspension compresses. This allows the saddle to float within the full travel of the post, creating a plush, bottomless feel that is more effective at isolating the rider from the road.

ShockStop vs. BodyFloat

ShockStop (L) vs. BodyFloat (R)
ShockStop (L) vs. BodyFloat (R)

The ShockStop and BodyFloat seatposts are both designed to "float" the saddle within the travel of the suspension, isolating the rider from vibrations as well as larger impacts. Both utilize linkage-based designs with 35mm of stated travel, and they’re similar in weight (ShockStop 497g, Bodyfloat 525g). Despite these similarities, there are some meaningful differences between the two designs:  

  • Preload Adjustment vs. Suspension Travel - Both the ShockStop and BodyFloat allow the user to adjust spring preload (the amount of force required to make the saddle start moving), but the way that the adjustment is accomplished is very different. With the BodyFloat, as you increase preload, the linkages compress downward, which means that you lose suspension travel as you increase preload. If you’re toward the upper end of the weight range for a given spring setup, or if you want to ride a more traditional, stiffer-feeling setup, you’ll have dramatically reduced suspension travel available when you encounter a larger impact.

    With the ShockStop Seatpost, the preload adjustment is accomplished by compressing the spring upward from the bottom of the post. This means that the travel range of the linkages is unaffected by preload - you always have the full 35mm of travel available regardless of where the preload is set.

  • Appearance - See "Appearance" in the Thudbuster ST comparison above.

ShockStop vs. Suntour NCX

ShockStop (L) vs. Suntour (R)
ShockStop (L) vs. Suntour (R)

The Suntour NCX is a linkage-based design with an internal coil spring, but there are some pretty big differences between the Suntour and the ShockStop:

  • Adjustability - The ShockStop and the Suntour both allow the user to adjust the spring preload (the amount of force required to make the saddle start moving), but with the Suntour, the stiffness of the spring is one-size-fits all. Whether you're 100lb or 250lb, you're stuck riding the same spring stiffness, which means that the vast majority of people aren't able to adjust the suspension performance properly.

  • Weight - In general, at Redshift we prefer not to fixate on bike weight because in practice, characteristics such as ride-quality and comfort have a dramatically bigger impact on performance. However, in this case, the Suntour's 795g (1.75lb) weight is difficult to ignore compared to 497g (1.1lb) for the ShockStop.

  • Appearance - See "Appearance" in the Thudbuster ST comparison above.

ShockStop vs. Specialized CG-R

ShockStop (L) vs. Specialized CG-R (R)
ShockStop (L) vs. Specialized CG-R (R)

The Specialized CG-R is a semi-rigid post that has a small degree of compliance built in. Compared to the ShockStop Seatpost they are dramatically different animals.

  • Suspension Travel - The CG-R claims 18mm of suspension travel, but in practice, it's a small fraction of that. The seatpost is marginally less stiff than a standard rigid post, and while it does help with road buzz, it does very little to mute anything larger than minor imperfections. The ShockStop has 35mm of usable suspension travel. This allows the post to absorb high-frequency buzz while also isolating your body from larger impacts commonly encountered on roads, gravel, and city streets. The difference in comfort is night and day.

  • Adjustability - The Specialized CG-R is a "one-size-fits-all" design, so the stiffness is the same whether you're 100lb or 250lb. With the ShockStop Seatpost, you can tune the suspension feel to precisely match your body weight and riding style. The seatpost is customized for YOU.

  • Weight - Comparing the weights of these two seatposts is like comparing apples and oranges, but if you're deciding between the two, weight is really the only reason to choose the CG-R (265g, 0.58lb) over the ShockStop (497g, 1.1lb).

24 Hours, 294 Backers, 247% Funded
9 months ago – Tue, Apr 17, 2018 at 12:46:17 PM

Thank You!

It's been an amazing first day for the ShockStop Seatpost! With the incredible support of the Kickstarter community, we shot past our funding goal in a matter of hours, and 24 hours after launch, 294 backers have helped us reach almost 250% of our original goal.

This perfectly captures how we feel. Thank you!
This perfectly captures how we feel. Thank you!

We wanted to reach out and say a huge thank you for helping make this project a reality. This is our third Kickstarter campaign, and we continue to be amazed by the enthusiasm and generosity of the community of backers.

FAQ and Page Updates

Even though it's been only 24 hours, we've gotten some great feedback and questions from backers. We added a bunch of FAQ and made some page updates to address common questions and concerns including (but not limited to):

  • Compatibility
  • International shipping & duties
  • Damping
  • Stem shipping
  • Dirt/Rain cover

If you have any questions that aren't answered either on the page or in the FAQ, don't hesitate to reach out to us in the Kickstarter comments, or via Facebook or email.

- The Redshift Team