Cycling · Head-to-head
Redshift Sports ShockStop Endurance Suspension Seatpost vs Cirrus Cycles Kinekt XR Aluminum Suspension Seatpost
Which should you buy? Our verdict on both, pulled from our full The Best Suspension Seatposts: 4 Compared (and One to Skip) comparison.
The ShockStop Endurance wins on breadth: the same 35mm of travel as the lighter posts, the widest range of lengths and diameters, and two springs in the box so most riders are covered on arrival. The Kinekt XR is the one to take if your weight or your cargo is near the top of the scale, because it publishes the widest window and includes every spring.
Redshift Sports ShockStop Endurance Suspension Seatpost
Buy itA parallelogram linkage post with 35mm of travel that stays active while you are seated and pedalling, sold in more lengths and diameters than anything else here.
- Redshift states 35mm of suspension travel and a 7mm rearward offset, rising to 12mm at a quarter of travel.
- Four lengths, 280, 350, 400 and 450mm, across 27.2, 30.4, 30.9 and 31.6mm diameters.
- Two springs ship in the box, one installed and a stiffer one spare, so most riders are covered on arrival.
- Rider weight limits are published per diameter: 110kg or 242 lb on 27.2 and 30.4mm, 120kg or 264 lb on 30.9 and 31.6mm.
- Heavier than the eeSilk+, from a stated 497 grams at 280mm to 732 grams at 450mm.
- The linkage is visible and mechanical looking, which not everyone wants on a road bike.
- The rider limit is lowest on 27.2mm, the diameter most road and gravel frames use.
Cirrus Cycles Kinekt XR Aluminum Suspension Seatpost
Buy itThe only post here that states a full rider weight window rather than a ceiling, and it arrives with every spring you might need already in the box.
- Cirrus states a rider window of 80 to 320 lb, or 36 to 145kg, which is the widest published here.
- Five springs supplied: two installed and three more in the box, so no follow-up purchase.
- A preload adjuster knob you can turn by hand, including mid-ride.
- Stated travel range of 0 to 35mm and a 24mm setback, with aluminium construction and Igus bushings.
- Weight is not published on the product page, and the dual-spring linkage is not a light design.
- Lengths of 350 and 420mm, plus a new 510mm that was listed as sold out.
- The linkage is tall and bulky, so it needs seatpost height to work with.
Side by side
The 9 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| Redshift Sports ShockStop Endurance Suspension Seatpost Our pick | Cirrus Cycles Kinekt XR Aluminum Suspension Seatpost | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Gravel, endurance road and commuting riders who want a post that keeps working under power and comes in a size that fits. | Heavier riders, cargo and e-bike riders, and anyone who would rather the correct spring arrived with the post. |
| Price tier | $$ · mid-range | $$$ · premium |
| Stated suspension travel | 35mm | 0 to 35mm |
| Spring medium | Swappable spring, material not stated | Swappable springs, five supplied |
| What ships in the box | Two springs, one installed | Five springs, two installed |
| Published rider weight | 242 lb on 27.2 and 30.4mm; 264 lb on 30.9 and 31.6mm | 80 to 320 lb window |
| Diameters | 27.2, 30.4, 30.9, 31.6mm | 27.2, 30.9, 31.6, 34.9mm |
| Lengths | 280, 350, 400, 450mm | 350, 420mm |
| Stated weight | 497g at 280mm up to 732g at 450mm | Not published |
| Setback | 7mm, rising to 12mm at a quarter of travel | 24mm |
| Dropper function | No | No |
Which one is right for you?
Pick the Redshift Sports ShockStop Endurance Suspension Seatpost if
gravel, endurance road and commuting riders who want a post that keeps working under power and comes in a size that fits.
Know before buying: heavier than the eeSilk+, from a stated 497 grams at 280mm to 732 grams at 450mm.
Pick the Cirrus Cycles Kinekt XR Aluminum Suspension Seatpost if
heavier riders, cargo and e-bike riders, and anyone who would rather the correct spring arrived with the post.
Know before buying: weight is not published on the product page, and the dual-spring linkage is not a light design.
The bottom line
Our overall pick is the Redshift Sports ShockStop Endurance Suspension Seatpost - A parallelogram linkage post with 35mm of travel that stays active while you are seated and pedalling, sold in more lengths and diameters than anything else here. Choose the Cirrus Cycles Kinekt XR Aluminum Suspension Seatpost instead if heavier riders, cargo and e-bike riders, and anyone who would rather the correct spring arrived with the post.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Suspension Seatposts: 4 Compared (and One to Skip).