FREE SHIPPING on orders of $50 or more.* Same day shipping before 3PM Pacific.
Questions? Call our experts!
20deg Offset
Click to zoom
20deg Offset
27.2mm x 330mm - 0deg Offset

SL Speed B1 Carbon Seatpost

Mfg PartNum:
  (2 customer reviews)
Earn $26.50 in Rewards credit. Click to learn more.
This size is not eligible for Rewards points
In Stock Now
Please Confirm Size
This item is currently out of stock. Click Notify Me to receive an email when the item becomes available.
InstantPrice MatchWhat is this?
Qualifies for Free Shipping!

The people's seat post.

The Zipp SL Speed Seatpost was a favorite of pro's and amateurs alike, both on those long rides through the mountains and at the starting line of 'cross races. Redesigned for 2017, the Zipp SL Speed B1 Carbon Seatpost benefit from their partner SRAM's Exogram™ technology, making this as light and strong as possible. Further improvements include a redesigned clamping system to provide even greater adjustability, security, and ease of use. To truly make this seatpost the people's choice, the SL Speed B1 is now available in either 0º or 20º offset versions.

Weighing in at just 170g for the 0º or 172 for the 20º, both available in two diameters: 27.2mm or 31.6mm.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Seatpost Type: Rigid 


Seatpost Clamp: 27.2 


Seatpost Clamp: 31.6 




Setback: 20 

27.2mm x 400mm - 0deg Offset

Mfg PartNum: 00.6818.021.006 

Seatpost Clamp: 27.2 mm


27.2 x 400mm - 20deg Offset

Seatpost Clamp: 27.2 mm

Setback: 20 mm

Mfg PartNum: 00.6818.021.004 

31.6mm x 400mm - 20deg Offset

Mfg PartNum: 00.6818.021.005 

Seatpost Clamp: 31.6 mm

Setback: 20 mm

31.6mm x 400mm - 0deg Offset

Seatpost Clamp: 31.6 mm


Mfg PartNum: 00.6818.021.007 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Great seat post with compliance, strength, and light weight
by Anonymous
Cycling Enthusiast
San Francisco, CA

Upgraded from Zipp Service Course post to this post and immediately noticed a difference in the compliance while riding. The post is stiff but also has a lot of compliance to absorb all the road noise.

Reviewed 8/5/2019
Was this review useful to you? Yes/No
Thank you for your feedback.
Lightweight and simple to adjust
by billspreston
2 of 2 customers found this review helpful.

This post is lightweight, comfortable, and the single bolt design is surprisingly easy to adjust without any slippage issues. A bit pricy, but in line with similar offerings. Does use a T25 Torx bolt which can be a turn off for some people.

Reviewed 9/27/2018
Was this review useful to you? Yes/No
Thank you for your feedback.

Articles will open in new tab.

Comparing bottom bracket types and standards.
You wanna go fast? Join the ceramic revolution!
Make your upgrades count. Here's the equipment that will help you ride your bike faster.
Campagnolo vs. Shimano vs. SRAM: demystifying groupsets.
What to consider when selecting a crankset for your road bike.
Clamps, materials, setback, oh my!