Zipp Service Course Seatpost - 27.2mm | Zero Offset
Seatposts
Zipp Service Course Seatpost - 27.2mm · Zero Offset
Zipp Service Course Seatpost - 27.2mm | Zero Offset
The Zipp Service Course Seatpost in zero offset configuration positions your saddle directly in line with the seat tube, ideal for riders who need their weight centered over the pedals or require a more forward saddle position for optimal fit. Read the overview
At a glance
- Diameter
- 27.2mm
- Offset
- Zero (inline)
- Material
- Aluminum
1 in stock
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Overview
Is the Zipp Service Course Zero Offset Seatpost Right for You?
The Zipp Service Course Seatpost in zero offset configuration positions your saddle directly in line with the seat tube, ideal for riders who need their weight centered over the pedals or require a more forward saddle position for optimal fit. Its low-profile clamp design offers a wider fore-aft adjustment range than most posts in this class, giving you room to fine-tune without running out of travel. Built for 27.2mm seat tubes, it covers a broad range of road, gravel, and endurance frames at an accessible price.
The Service Course aluminum construction balances light weight with the structural rigidity needed to keep your saddle locked in position through hard efforts and rough roads. Straightforward clamp design means installation and adjustments are quick and tool-friendly without any fuss. Whether you are starting a new build or upgrading a stock post that has never felt quite right, the Zipp Service Course Seatpost delivers Zipp-level fit precision without the carbon price tag.
All the specs
MPN 00.6818.049.002
- Material
- Aluminum
- Diameter
- 27.2mm
- Offset
- Zero (inline)
- Clamp
- Low-profile design with expanded fore-aft adjustment range
FAQ
Good questions
Get to know Zipp

There's more to Zipp than this one product. Our Zipp page has the full Zipp lineup we carry and more about the brand.
Visit the Zipp page →Who should use a zero offset seatpost?
Riders who have a shorter torso, shorter femurs, or who naturally fit with their saddle forward of the bottom bracket centerline often benefit from a zero offset post. A bike fit is the best way to determine the right offset for your body.
Is the zero offset version compatible with the same frames as the 20mm setback?
Yes. Both the zero offset and 20mm setback Service Course Seatposts share the same 27.2mm diameter and work with the same range of road and gravel frames. The difference is purely positional.
Can I run this post on an aggressive road racing bike?
Absolutely. Zero offset is commonly used on more aggressive road geometry where the saddle sits directly over or slightly forward of the bottom bracket for an efficient, powerful pedaling position.
Reviews
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