The Redshift Sports ShockStop Endurance Suspension Seatpost uses a parallelogram linkage and adjustable spring system to provide 35mm of active suspension travel. Its plush, active suspension is designed to absorb bumps and vibration while keeping the saddle moving naturally as you pedal. Preload adjustment and interchangeable springs let you tune the feel for your weight and riding style.
Key Features
35mm of active suspension travel
Optimized linkage geometry for a responsive, active suspension feel
Parallelogram design keeps the suspension active while pedaling
Adjustable spring preload for fine-tuning suspension feel
Includes two springs to accommodate different rider weights and preferences
7mm rearward saddle offset, increasing to 12mm at 25% travel
Compatible with 7mm round and 7x9mm oval saddle rails
Available in multiple diameters and lengths
6061-T6 aluminum construction
ASTM F2043 Class 2 intended use for on- and off-road riding and drops under 15cm (6")
Who It's For For riders who want a plush, active suspension seatpost for gravel, bikepacking, commuting, e-bikes, or rough roads. The Endurance is the comfort-focused option in Redshift's ShockStop lineup, prioritizing bump absorption and fatigue reduction over the lighter, more race-oriented feel of the PRO.
Specifications & Identifiers
Clamp Style
Standard Rails
Color
Black
Defined Color
Black
Diameter - Seatpost
27.2mm, 30.9mm, 31.6mm
Length - Sus Seatposts
350mm
Material
Aluminum
Offset
7mm
Seatpost Type
Suspension
Travel (mm)
35mm
Weight
497
Black - 27.2 x 280mm UPC
850027370279
Black - 27.2 x 280mm MPN
RS-50-02
Black - 27.2mm x 350mm UPC
736313570038
Black - 27.2mm x 350mm MPN
RS-50-01
Black - 30.9mm x 400mm UPC
822051059109
Black - 30.9mm x 400mm MPN
RS-50-33
Black - 31.6mm x 400mm UPC
822051251879
Black - 31.6mm x 400mm EAN
4710636258510
Black - 31.6mm x 400mm MPN
RS-50-43
Tree Fort ID:
333222441324
Review Summary
LIKES
Tough (1),
pretty (1)
WORKS FOR
Road (1)
DISLIKES
none
5.0 GEARS 2 reviews
or
Customer Questions
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I've been riding a Thudbuster LT 3G (long travel) for over a year now, mostly off-road on my gravel bike. The Thudbuster is wonderful for big hits and long stuttery or rutted singletrack. However, you feel a bob as the seat returns on the flats. That bob really slows you down on paved sections due to disrupting your high-powered pedaling. Seated climbing on the road, for instance, suffers with the Thudbuster.
I've been riding the Redhsift Shockstop for maybe 35 miles now. It eliminates the bob without losing the ability to take the big hits. This is the evolution of suspended seatposts. In fact, I barely notice it's even working. That's how good it is. In no way is my pedaling cadence affected by the suspension. I can now ride on the road with my gravel bike without feeling like I'm losing 30% of my energy ... YEAH!
Additionally, due to some thoughtful engineering, it works with a normal seat bag without any hassle, which is quite rare for suspension seatposts. The beautifully understated matte paintjob and graphics are bulletproof. All that and it's lighter than my Thudbuster!
This purchase has me seriously considering their suspension stem.