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Ritchey WCS Carbon 1-Bolt Seatpost


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  • Carbon, 27.2x350mm, 0mm Offset
  • Carbon, 27.2x350mm, 25mm Offset
  • Carbon, 31.6x400mm, 25mm Offset

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WCS Carbon 1-Bolt Seatpost

Drawing on Ritchey's extensive heritage in cyclocross racing, the WCS Carbon Seatpost brings dependability, simplicity, and elegant aesthetics to your 'cross or gravel steed. The refined carbon construction ensures a high strength-to-weight ratio, while the 1-Bolt SideBinder seat clamp eliminates the frustration of finicky 2-bolt designs. Secured by a single 5mm bolt, the SideBinder offers ease of adjustability while at the same time relieving stress on saddle rails.

  • A carbon fiber masterpiece designed for 'cross or gravel steeds
  • Monocoque carbon construction is strong and lightweight
  • Single-bolt head is secure and very easy to adjust
  • Includes clamp for standard 7 x 7mm saddle rails
  • Clamp kit for carbon fiber saddle rails sold separately
  • Item #RITA09F

monocoque carbon fiber
27.2mm, 30.9mm, 31.6mm
[27.2mm] 350mm, [30.9mm, 31.6mm] 400mm
0mm, 25mm
Claimed Weight
[27.2/350mm] 185g
Recommended Use
cyclocross, gravel
Manufacturer Warranty
1 year

Tech Specs

What do you think about this product?


>Rating: 1

Under no circumstances should you buy

I've used it once or twice and have initial impressions

This is the worst designed seat post clamp ever. I should have taken the warning from my LBS seriously. My LBS would not even take the time to put on. They said too much of a PIA. They were right. It requires two people to get a saddle attached. Finally got one but I took back off. Going to return it. I don’t want a seat post that required this much effort.

I have two of these posts. Yes, they can be tricky to mount, but by backing out the mount screw to the very edge, I was able to slide the seat into the mount front first and get it into the rail mounts. I love this seat post. Once the saddle is on, it is infinitely adjustable and it is lighter than anything else you can find at the $200 price point.