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Zipp Service Course SL Carbon Seatpost Review
The layup offers superb comfort without feeling noodly.
Gear Reviews

Zipp Service Course SL Carbon Seatpost Review

Jason MitchellBy Jason MitchellSeptember 5, 2018No Comments3 Mins Read

Calling all alloy bikes, calling all alloy bikes — this is the seatpost you’ve been waiting for. With a comfort-tuned design that’s also lightweight, the new Zipp Service Course SL Carbon Seatpost is a no-brainer for gravel bikes, alloy bikes or anyone else looking to add a touch of comfort for very little money.

Zipp Service Course SL Carbon Seatpost Features:

  • Alloy head is compatible with all saddle rails
  • Available in 0 or 20-degree setbacks
  • 400mm length (perfect for compact frames)
  • Available in 25.4, 27.2, and 31.6mm diameters
  • Passes MTB-level safety tests
  • 100mm minimum insert and 7nm seat rail torque
  • Weight: 250 grams (actual, 20-degree)
  • MSRP: $160
Zipp Service Course SL Carbon Seatpost
Immediate comfort for alloy frames or gravel riding.

Comfort is the SL Carbon’s middle name

Carbon seatposts are game-changers for many bikes — especially those with compact frame geometries where more of the seatpost extends out from the seat clamp of the frame. That extended length of material is best served with a carbon post like the Zipp Service Course SL Carbon because of the added fore/aft flex and chatter reducing characteristics of carbon fiber.

When introduced to the new Service Course SL lineup, there was a heavy emphasis on gravel bikes with a nod towards helping further improve the ride. But, the SL Carbon seatpost will equally help any bike become more comfortable.

Zipp Service Course SL Carbon Seatpost
The 20mm setback version features accessible bolts that are easily-torqued.

Installing a saddle on the all-new clamping head is a breeze with both bolts easily-reached and torqued using the Park Tool Adjustable Torque Wrench. I did notice, however, that the bottom cradle can get off-center while the bolts are loose. Keep an eye on that to ensure it torques down in the proper position (right in the center).

I installed the SL Carbon seatpost on the Niner RLT 9 gravel bike. It’s an alloy frame with compact geometry, which left me with a good length of exposed seatpost. The amount exposed will vary based on your frame and saddle height, but in general the more exposed the more deflection you’ll experience.

There is enough deflection that you can feel it working, but it never detracts from putting power down. I’ve definitely appreciated that as I’ve pushed myself on long climbs and sprints. You don’t get that pogo sensation that can happen with some seatposts featuring high amounts of deflection.

Note: The prior alloy Service Course SL seatpost was great, but the new carbon version is better in every way and should be making its way into retailers soon.

The Good

  • Added comfort you can feel
  • Incredible value
  • Accessible bolts for easy saddle torquing
  • Works with any rail shape
  • Simple, straightforward head

The Bad

  • It is a touch heavier than comparable seatposts

The Bottom Line: Zipp Service Course SL Carbon Seatpost

As one of the easiest upgrades you could order up for your bike, the Zipp Service Course SL Carbon Seatpost will deliver measurable comfort without breaking the bank. It looks great, is available in zero or 20mm setback and will fit about any modern road or gravel frame on the market.

More Info: Visit Zipp.com

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Jason Mitchell
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A native of the Pacific Northwest, Jason quickly developed a love for the outdoors and a thing for mountains. That infatuation continues as he founded this site in 1999 -- sharing his love of road biking, mountain biking, trail running and skiing. That passion is channeled into every article or gear review he writes. Utah's Wasatch Mountains are his playground.

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