Mon-Sat 8am-5pm PT
Bike Tires Direct logo. Link to homepage.
Serving cyclists
since 2002


Product Images

Zipp Service Course SL Seatpost 20mm Offset
Zipp Service Course SL Seatpost 0mm Offset
20mm Offset
Click Here for Larger Image
Zipp Service Course SL Seatpost 2
Zipp Service Course SL Seatpost 1

Zipp Service Course SL Seatpost


Pricing and Order Section

Mfg PartNum:
MSRP: $172.00
That's off
In Stock
Ships Free!
Earn $12.04 in VIP credit. Click to Learn More.
This size is not eligible for VIP points
Price matches are is not eligible for VIP points


Unidirectional Carbon Fiber Seatpost Tuned For Ride Comfort

The Zipp Service Course SL Seatpost is specifically tuned to be more shock-absorbing than the "comfort" seatposts on the market, while still passing the brand's strict internal MTB strength test.

Flex engineered into the lightweight carbon tube keeps the rider comfortable over any terrain.

Better fit means better performance, and if your saddle is out of position, you'll waste energy with every pedal stroke.

The secure, two-bolt clamp makes for easy micro-adjustments of saddle position, and the head has been redesigned for maximum bolt head accessibility.

With 0mm and 20mm setback options, it's possible for nearly any rider to achieve the perfect fit, and the clamp works with all saddle rail types.


  • Unidirectional carbon fiber tuned for ride comfort
  • Lightweight clamping system
  • Distinctive Zipp cosmetics with stealth decals
  • Choose from 3 post diameter: 25.4mm, 27.2mm, or 31.6mm
  • Choose from 2 offsets: 0mm or 20mm
  • Post length: 400mmm
  • Hardware: Steel

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.


25.4mm/0mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.057.001 

Setback: 0 degrees

Seatpost Type: Rigid 

Seatpost Clamp: 25.4 

25.4mm/20mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.056.001 

Setback: 20 mm

Seatpost Type: Rigid 

Seatpost Clamp: 25.4 

27.2mm/0mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.057.002 

Setback: 0 degrees

Seatpost Type: Rigid 

Seatpost Clamp: 27.2 mm

27.2mm/20mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.056.002 

Setback: 20 mm

Seatpost Type: Rigid 

Seatpost Clamp: 27.2 mm

31.6mm/0mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.057.000 

Setback: 0 degrees

Seatpost Type: Rigid 

Seatpost Clamp: 31.6 mm

31.6mm/20mm Offset - Black w/Matte Black Logo

Mfg PartNum: 00.6818.056.000 

Setback: 20 mm

Seatpost Type: Rigid 

Seatpost Clamp: 31.6 mm

Mfg Warranty: 72 Mo. Parts & Labor

Warranty URL: https://www.sram.com/en/zipp/campaigns/warranty


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 7/10/2023
by Seatpost
Cycling Enthusiast
Value Rating
Overall Rating

I wanted a no setback seatpost for a better fit on the bike than the one it came with. Seems good. Original post was also carbon fiber. Didn't notice a big difference in regards to flex versus the original.

Was this review useful to you? Yes/No
Thank you for your feedback.

Mechanic's Corner

Articles will open in new tab.

A guide to picking the best seat post for your riding style.
additional content loading
additional content loading
additional content loading

We are committed to delivering outstanding value and service to our customers, every day.
Try us today to see why so many of our customers come back again and again.

*Orders received before 3:00PM Pacific time are shipped the same day (Mon-Fri). Orders over $50
are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 15

5741 NE 87th Ave (I-205 exit 23B) Portland, OR 97220 | 800-682-0570 | [email protected]