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Item # ZIP001Z

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  • Beyond Black, 20/330/27.2 ($114.95)
  • Beyond Black, 20/330/31.6 ($114.95)
  • Beyond Black, 0/330/27.2 ($114.95)
  • Beyond Black, 0/330/31.6 ($84.98)
  • Polished Black, 20/330/27.2 ($114.95)
  • Polished Black, 20/330/31.6 ($114.95)
  • Polished Black, 0/330/27.2 ($114.95)
  • Polished Black, 0/330/31.6 ($114.95)
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Item # ZIP001Z

Even more super light.

By using a single piece, forged head and shaft instead of bonding separate units, Zipp was able to make its Service Course SL Seatpost even more Super Light. The titanium bolts also contribute to weight loss, and the fact that they're easily reached from below means that you can simply adjust your saddle position once it's installed. The clamps themselves feature a low profile which provides more clearance and a wider range of fore/aft adjustment.

Tech Specs

7075 aluminum
27.2 - 31.6 mm
330 mm
0 - 20 mm
Claimed Weight:
[zero offset] 220 g, [20mm offset] 235 g
Manufacturer Warranty:
2 years
Recommended Use:

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Well-executed aluminum version

  • Familiarity: I've put it through the wringer

The SL is pretty light, looks great, and has one of the best seat clamp designs. Cosmetically, the lower portion is matte finish which obscures any scratches from raising and lowering the post. The upper part has that lustrous but stealth finish that characterizes the SL line. The disadvantage of the post is it is still aluminum so it may be stiffer than carbon alternatives, and you may have to use special compound to avoid Al/Ti bonding if you use it with a titanium frame.

On your list of zipp course sl seatpost sizes im confuse as to what. 20/330/31.6 and 0/330/31.6 are the first numbers mean?