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✕
SHOCKSTOP SUSPENSION SYSTEM
SMOOTH THE ROAD
The Shockstop System is a revolutionary short-travel suspension system designed for all riders and all bikes. The ShockStop Seatpost and Stem suspend the rider, smoothing out rough terrain to let you ride faster, further, and more comfortably on the bike you already own.
GO FURTHER
The Shockstop System reduces the accumulation of fatigue that happens as your body absorbs bumps and vibration. Ride further than ever before and arrive feeling fresh.
RIDE FASTER
The Stem and Seatpost absorb momentum-killing bumps and vibrations. Energy that is normally wasted suspending your body is instead converted into for- ward motion.
TAKE CONTROL
The short-travel suspension floats over obstacles so you can maintain control through rough terrain. Customize the suspension feel to match your exact terrain and riding style.
"I’M KICKING MYSELF FOR NOT INSTALLING THIS SOONER. MY FIRST RIDE ON THE SHOCKSTOP WAS AN EYE OPENER ... I HAVE NO PLANS TO TAKE IT OFF." - TYLER BENEDICT, BIKERUMOR
"I DIDN’T WANT TO LIKE THE SHOCKSTOP STEM AS MUCH AS I DID. I WAS DULY IMPRESSED BY THE SHOCKSTOP’S ABILITY TO SMOOTH OUT THE ROAD SURFACE WITHOUT BEING OBTRUSIVE." - JAMES HUANG, CYCLING TIPS
EXTRAORDINARY COMFORT. I WAS AWARE OF SURFACE UNDULATIONS, BUT THE SHOCKSTOP IS SO REACTIVE THAT NO IMPACTS OR VIBRATIONS MADE IT TO THE SADDLE. - ROBIN WILMOTT, BIKERADAR
I'M A BIG FAN OF THIS SEATPOST. THE SUSPENSION ACTION IS JUST SO SMOOTH. - STU KERTON, ROAD.CC
"THE SHOCKSTOP STEM IS A TRULY EFFECTIVE RIDE-SMOOTHING SOLUTION WITH ALMOST NO PRACTICAL DOWNSIDES." - ROBIN WILMOTT, BIKERADAR
GOOD LOOKING, EFFECTIVE, AND EASILY SET UP. GET THE REDSHIFT SHOCKSTOP POST AND MATCH IT WITH A SHOCKSTOP STEM. GAME CHANGER INDEED. - GUITAR TED, RIDING GRAVEL
"THE SHOCKSTOP DOES WHAT IT CLAIMS TO DO AND DOES IT WELL WITHOUT DRAWING ATTENTION TO ITSELF, WHICH IS RARE THESE DAYS." - GUITAR TED, RIDING GRAVEL
"THE POST IS QUITE ACTIVE WITHOUT FEELING BOUNCY. IT IS A GAME-CHANGER ON AND OFF-ROAD, DOWNHILL AND UP IN THAT YOU CAN SIT IN TO APPLY THE POWER OVER BUMPY TRACK." - CLIFF LEE, CX MAGAZINE
"REGARDLESS OF BIKES, I WON’T RIDE GRAVEL WITHOUT THE SHOCKSTOP EVER AGAIN" - BEN EDWARDS, PELOTON MAGAZINE
AFTER TESTING... IT WON ME OVER. I LIKE THE REDSHIFT POST ENOUGH TO KEEP IT ON - RUSS, PATH LESS PEDALED
THE SHOCKSTOP SEATPOST IS IMPRESSIVE. IT VIRTUALLY ERASES SMALL AND MID-SIZED BUMPS AND DOESN’T BOB EXCESSIVELY ON SMOOTHER SURFACES. - MATT GERSIB, RIDING GRAVEL
—DESCRIPTION
The minimal design of the ShockStop Suspension Stem and Suspension Seatpost blend seamlessly with the aesthetic of modern bikes, while reducing fatigue and strain. The stem and seatpost work together to suspend the rider and smooth out rough terrain on the bike you already own, making your ride smoother, faster, and more comfortable.
Benefits:
• Go further - reducing fatigue that happens as your body absorbs bumps and vibrations • Ride faster - feeling refreshed from the energy that is normally wasted suspending your body as it is converted into forward motion
• Take control - customizing your suspension feel to float over obstacles so you can maintain control
Stem Details:
• The ShockStop Stem is available in two angle options and two steerer tube diameters: -+/-6 degree in 80, 90, 100, 110, and 120mm lengths (in both standard 1 1/8" steerer and oversized 1 1/4" steerer) -+30 degree high-rise version in 80mm and 100mm lengths (only available fo 1 1/8" steerer) • The ShockStop PRO Stem is only available in +/-6 degree angle and 1 1/8" steerer: -80, 90, 100, 110, and 120mm lengths • Effective suspension travel: -Up to 20mm • Includes 5 swappable elastomers to fine tune your riding style • Check technical specs for compatibility
Should I get the PRO Stem?:
• The ShockStop PRO Stem has a sleek, polished 'blacked out' appearance, and offers ~15% weight savings (depending on length) over the standard ShockStop Stem. It achieves these weight savings thanks to the use of Titanium hardware, and weight reducing CNC machining. • The ShockStop PRO Stem functions the same as the standard ShockStop Stem, and is the ideal choice for a more performance focused and weight conscious rider.
Seatpost Details:
• The ShockStop Seatpost is available in two length options: - 280mm and 350mm
• 35mm of active suspension travel
• Infinitely adjustable stiffness via pre-load adjustment and swappable springs
• Adjusting stiffness / pre-load does not shorten travel
• Swappable springs included to accommodate varied rider weight and preference
• Check technical specifications for compatibility
What's in the Box:
• 1 x ShockStop Stem or ShockStop PRO Stem, 5 x swappable elastomers (2 pre-installed, 3 additional in box), and all required hardware
• 1 x ShockStop Seatpost, 2 x springs (1 pre-installed, 1 included in box for increased stiffness), and all required hardware
+TECHNICAL SPECIFICATIONS
ShockStop Suspension Stem:
Weight
Standard Stems: 254 g +/- 6 deg, 80 mm 264 g +/-6 deg, 90 mm 274 g +/-6 deg, 100 mm 286 g +/-6 deg, 110 mm 298 g +/-6 deg, 120 mm 253 g +30 deg, 80 mm 274 g +30 deg, 100 mm
For oversized steerer, add 2-5 g
PRO Stems: 220 g +/- 6 deg, 80 mm 229 g +/-6 deg, 90 mm 234 g +/-6 deg, 100 mm 240 g +/-6 deg, 110 mm 248 g +/-6 deg, 120 mm
Steerer Clamp Diameter (A)
Standard 1-1/8 inch (28.6 mm) Oversized 1-1/4 inch (31.8mm)
Handlebar Clamp Diameter (B)
31.8 mm
Effective Travel
Up to 20 mm on drop-bar bike Up to 10 mm on flat-bar bike
Material
6061 T6 aluminum
Rider Weight Limit
135 kg (300 lb)
Steerer Tube Clamp Stack Height
40 mm
Intended Use
ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6").
ShockStop Suspension Seatpost:
Diameter
27.2 mm (shims available for larger seat tube sizes)
Length
280 mm (11 in) 350 mm (14 in)
Suspension Travel
35 mm (1.4 in)
Rearward Offset
7 mm (0.25 in)
Rearward Offset (@ 25% travel)
12 mm (0.4 in)
Spring Pre-load
User Adjustable
Weight
280 mm is 498 g - w/main spring 350 mm is 548 g - w/main spring
ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6").
+FAQ
[Stem] How do I choose the right length and angle for my bike?
We put together a set of instructions that can help you determine the length and angle of your existing stem and provide guidance on what to chose based on riding style - check it out here.
[Stem] How is the ShockStop Stem different from other suspension stems?
There are a lot of ways the ShockStop is different - so many in fact, we wrote a whole blog post about it. Check it out here.
[Stem] How do I measure my steerer tube diameter?
The easiest way to determine your steerer tube size is to use a pair of calipers to directly measure the diameter or take your bike to the local bike shop and they will be able to measure it for you. Alternatively, most of the time a manufacturer will list this under their specifications in the Frame/Fork section. Make sure you are looking at the correct model year as these sizes can change year to year. The 1-1/8" ShockStop Stem is the standard size used by most modern bikes. The 1-1/4” version can now be used on popular brands such as Giant and Canyon bikes.
To read more Frequently Asked Questions about the ShockStop Stem, click here.
[Seatpost] What is the minimum and maximum insertion depth and clearance for the ShockStop Seatpost?
What length should I choose? 350mm or 280mm?
350mm is our standard size, but we developed the 280mm to allow for a wider range of fits. Measure your current seatpost from the clamp collar to the saddle rail - If that distance is less than 205mm, you can use the 280mm seatpost. If not, order the 350mm size.
[Seatpost] What kind of saddle bags can I use with the ShockStop Suspension 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. Any bag that just attaches to the saddle or just attaches to the post is fine. But when you attach to both the post and the saddle you need to account for the relative motion of the saddle to the post. This means that if you cinch down the bag when off the bike it might have some movement when you get on the saddle and compress the post a bit - this might not be a problem but it might be something that is an issue. It all really depends on weight and how stable the bag is and if it is attached to both the post and the saddle - it can be fine but with a lot of weight it will mean it can move around when the post is compressed. It will likely come down to testing it out with your specific bag to see how it works. And if you have a bag that is able to be secured to just the post or to the post and a rear rack then you will be all set.
[Seatpost] Is the stiffness of the ShockStop Seatpost adjustable?
Absolutely - We designed the ShockStop Seatpost so that you can adjust it to perfectly match your weight and riding style. The seatpost comes with a standard spring and an additional spring that can be added inside the standard spring to increase the stiffness. The preload adjustment knob at the bottom of the seatpost allows you to adjust the spring preload - the amount of force required to cause the saddle to start moving.
To read more Frequently Asked Questions about the ShockStop Seatpost, click here.
Installing the ShockStop Stem (see below for 80mm elastomer instructions):
Elastomer Install and Removal for 80mm ShockStop Stem:
Elastomer Selection Chart:
(See instructions and video for elastomer installation details)
The above chart provides a good starting point when first setting up the stem. The chart below shows the full list of elastomer combinations, in order of increasing stiffness:
Installing the ShockStop Seatpost:
Video Section Time-Stamps:
00:14 Compatibility 01:41 Choosing Your Starting Setup 03:00 Installing Inner Spring 05:36 Setting Initial Preload 06:55 Measuring Your Existing Saddle Position 08:11 Installing the Seatpost in Your Bike 09:56 Installing the Saddle 11:42 Positioning Your Saddle 14:03 Tightening the Saddle Clamp Bolts 16:27 Setting 20% Sag 18:22 Maintenance
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