ShockStop PRO Endurance Suspension Seatpost
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Description
Benefits:
- Sporty Performance - 35mm of damped suspension travel, providing the perfect choice for riders who want lots of suspension travel in a lightweight package and highly tunable stiffness.
-
Tunability - This new design features a combination of e
lastomers and coil springs for a more progressive spring rate and controlled travel while still maintaining small bump sensitivity and low weight. Swappable elastomers and springs allow you to change the suspension stiffness, while a preload adjustment lets you dial in the perfect feel.
- Lightweight - up to 13% weight reduction (up to 74 grams!) than the equivalent set-up in the standard ShockStop Seatpost and ultra-sleek styling
- Go farther - reducing fatigue from bumps and vibrations
- Ride faster - energy that is normally wasted suspending your body is converted into forward motion
- Improve control - float over obstacles
- For the ultimate suspension system, pair with the ShockStop PRO Stem or ShockStop Stem
- Looking for fine-tuned race performance & ultra-lightweight? Choose the ShockStop PRO Race Seatpost
Details:
- The ShockStop Seatpost is available in two length options:
- 280mm and 350mm
- 35mm of active suspension travel
- Combination of coil springs & swappable elastomers
- Optimized linkage geometry provides ultra-responsive suspension feel
- 350mm size is Di2 battery compatible (using standard di2 adapter), 280mm is NOT Di2 Compatible
- Check technical specifications for compatibility
What's in the Box:
- 1 x ShockStop PRO Endurance Suspension Seatpost
- Pre-installed inside seatpost:
- Red (medium) Elastomer with End Caps
- Outer Coil Spring
- Inner Coil Spring
- Green (Soft) Elastomer with End Caps
- Included in box:
- Red (Medium) Elastomer with End Caps
- All required hardware
What is a Suspension Seatpost?
A suspension seatpost is a specially designed bicycle seatpost featuring shock absorbing construction that helps smooth out bumps in the terrain and reduce the impact to the rider. They are best suited for gravel biking and bikepacking applications but are also used on road bikes to help riders stay in the saddle through rough roads.
The Shockstop suspension seatposts feature a proprietary parallelogram design, which allows for the suspension to remain active even when you're seated and pedaling. This means that you can benefit from the suspension's smoothing effect even when you're putting down power, unlike some suspension seatposts that become rigid when you're pedaling. For an ultralight, race-tuned version, choose the ShockStop PRO Suspension Seatpost.
The minimal design of the ShockStop Suspension Seatpost blends seamlessly with the aesthetic of modern gravel, road, and e-bikes. Along with the ShockStop Suspension Stem, this suspension system works together to reduce fatigue and strain, letting you ride farther, faster, and more comfortably.
Benefits of a Suspension Seatpost
Improved comfort: Suspension seatposts help to absorb shocks and vibrations from rough roads, reducing stress and fatigue on your body, especially your hands, arms, and back. This can lead to a more comfortable ride and reduced risk of injury.
Improved control: By absorbing shock and vibrations, a suspension seatpost can help to maintain traction and stability on rough roads, allowing you to ride with more confidence and control.
Reduced fatigue: By reducing the amount of stress and fatigue on your body, a suspension seatpost can help you to conserve energy and ride for longer without feeling as tired.
Better performance: By allowing you to maintain traction and control on rough roads, a suspension seatpost can help you to ride faster and more efficiently, especially on technical terrain.
Technical Specifications
| Diameter | 27.2mm (shims available for additional non-standard seat tube sizes) |
| Length | 280 mm (11 in) 350 mm (14 in) |
| Suspension Travel | 35 mm (1.4 in) |
| Rearward Offset | 7 mm (0.27 in) |
| Rearward Offset (@ 25% travel) | 12 mm (0.47 in) |
| Spring Pre-load | User Adjustable |
| Weight | 280 mm – 445 g 350mm – 502 g |
| Rider Weight Limit | 110kg (242lb) for 27.2mm diameters |
| Material | 6061 T6 Aluminum Alloy |
| Saddle Rail Compatibility | 7mm round & 7x9mm oval |
| Di2 Battery Compatibility | Only compatible with the 27.2mm diameter x 350mm length, please email support@redshiftsports.com for PRO Endurance Di2 kit |
| Intended Use | ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6"). |
Instructions
Download Instructions (PDF):
Instructions - ShockStop PRO Endurance Suspension Seatpost
US Shipping Info
- Free Shipping with tracking – Applied to all orders under $74 USD.
- Economy Shipping with tracking – Orders over $74 USD qualify for free shipping.
- Economy Shipping with tracking – 1-3 business days after processing time.
- Orders ship via our third-party fulfillment service, that will select the most efficient carrier based on your location. Standard delivery typically takes 3-8 days, though in some cases, it may extend up to 15 days.
- Order processing time is 1-3 business days.
- If you order multiple items, they may be shipped from separate warehouses and may not arrive at the same time.
90 day risk free trial & returns
Different bikes sometimes have different seatpost diameters. The ShockStop Suspension Seatpost comes in 27.2mm diameter, so if your bike's seatpost is a different size, you'll need a shim to allow the 27.2mm size to adapt to your bike's frame. Don't worry though, the shims are super-lightweight and essentially invisible once installed.
Not sure what size seatpost you have currently? There are a couple different ways to find out.
• Most seatposts have the diameter printed somewhere near the bottom of the post. You'll need to remove the seatpost from the bike frame (mark your existing seatpost height with a bit of tape before you remove it so you can replace it easily), and look for a number like 27.2, 30.9, or 31.6 (etc.). That is the diameter of the post.
• If you know the make, model, and year of your bike, you may be able to look up the seatpost diameter online. Feel free to shoot us an email at info@redshiftsports.com - we'll see if we can help out.
• Ask your local bike shop - they'll be able to accurately measure your bike's seatpost.
Non-compatible posts: Unfortunately, if your bike's seatpost is smaller than 27.2mm (for example, the 25.4mm posts found on some recent model Cannondale Synapses) our seatpost is currently not compatible with your bike. Likewise, if you have a bike with an aero/oval/non-round seatpost, or if your bike has an integrated seatmast, the seatpost is also not compatible.
What length should I choose? 280mm or 350mm?
Measure your current seatpost from the clamp collar to the saddle rail:
- If that distance is less than 205mm, you can use the 280mm suspension seatpost.
- If it is between 205mm and 250/275mm (depending on diameter) order the 350mm size.
Smooth. Controlled. Effortless. The Future of Suspension
Years of research, cutting-edge technology, and rider-focused design—built to revolutionise your ride.
Adjustable Stiffness
Fine-tune your ride with customizable settings, optimising comfort and performance for any terrain.
Precision-Engineered Shock Absorption
Eliminates road buzz and dampens impact forces, reducing strain on hands, wrists, shoulders and back.
Optimised for All Riding Styles
Whether you're racing, exploring or commuting, we have an option that is designed to improve your riding experience.
Redshift trusted by
200,000+
As seen in
Spencer
Bought this post because of the AWFUL Chicago streets, and I am overjoyed at it's performance. I love that it is adjustable, feels extremely well-made, and enhances the look of my e-bike. Thank you for such a thoughtful product, my butt especially thanks you. Money well spent!
William S
This is a great addition to my gravel bike. It took a few adjustments to get the right elastomers but, it definitely smooths out the ride. Will be purchasing a set for my road bike.
Scott C
This seat post is a game changer!! Absolutely love it on my gravel bike .gonna get one for my hard tail Mtb now
TD
Love the stem!! It really takes out all the worse bumps from your ride, and on rough trails really did offer a smooth comfortable ride.
Lawrence C
I hesitated buying this stem wondering would it work, was it a waste of money but I’ve had three off road rides with my new stem and I love it. I usually get pins and needles in my hands after riding for a while but that’s gone now. Added to the comfort is the improved handling on bumpy tracks and roads. I can ride a corrugated road now without feeling like I will get shaken off the bike. Very happy.
Jim G
I love my Redshift post! I recently had a lumbar contusion and the post has smoothed and cushioned the roads and trails. I’m able to stay on the bike while healing.
Ian S
After much thought I bought a red shift suspension stem and initial thoughts are that it's good, think they will become standard across all my gravel bikes.
Stephen H
I just finished my first ride with the Resdhift Shockstop Suspension Stem and I noticed the difference immediately. Having ridden for many years with rigid front ends (I’m 64) I now wish I had discovered this earlier in my life. The chatter that it removes from my wrists, arms and shoulders is easily noticed. This experience has been so good that now I’m considering the seatpost Redshift offers as well. The interesting thing for me is that I’ve promoted and sold these products for years based upon input from others. I just didn’t think I needed one myself. Get yourself one! You’ll never go back.
Mark G
The shock absorber was easy to install and works as described cuts down on the impact. I recommend it if you're going to do gravel, writing and bumpy bumpy roads
Karlos R
Wow, once I got the fit dialed on this seat post I thoroughly understood why everyone was upgrading their set ups with these products. Riding a long distances is what I do for fun and for a living and this seatpost made all the difference in the world. Pay attention to the recommended Sag settings as its key to finding comfort and keeping a proper pedaling extension. 10 out of 10 would recommend.
Perfect For
Gravel Riding
Absorbs rough terrain and vibrations, improving comfort and control on long gravel rides.
Road Cycling
Reduces road buzz and impact from potholes, allowing for a smoother, more efficient ride
Bikepacking & Touring
Minimises fatigue on long-haul adventures, making multi-day rides more comfortable
Commuting
Handles city streets, curbs, and uneven surfaces with ease for a more enjoyable daily ride.
- Reviews
- Questions
United StatesRedshift review
I love my Redshift post! I recently had a lumbar contusion and the post has smoothed and cushioned the roads and trails. I’m able to stay on the bike while healing.
United States
SpainACIERTO DE CONFORT
Actúa más directo al cuerpo que una amortiguación trasera, tenemos un grupo con el mismo modelo de bici e-gravel y después y después de probarlo les ha convencido notablemente, el único pero es el precio.
ItalyShockstop Pro Endurance
Great item, this is a game changer!
AustraliaSmooth as...
It’s a beautifully engineered piece of kit that does what it says - stops the shock! When I step back on one of my other bikes (without Shockstop), I notice myself subconsciously bracing with my legs as I go over bumps to try and absorb the shock. Not so with the ShockStop - just ride over them and it takes them out! Fantastic product.
United StatesThe best enhancement to my cycling experience in the past 10 years
Wow, once I got the fit dialed on this seat post I thoroughly understood why everyone was upgrading their set ups with these products. Riding a long distances is what I do for fun and for a living and this seatpost made all the difference in the world. Pay attention to the recommended Sag settings as its key to finding comfort and keeping a proper pedaling extension. 10 out of 10 would recommend.
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