*Free shipping on orders over $99

Free Shipping Policy

Free Shipping applies to all orders placed for $99 and above
(pre-tax value). Some restrictions apply:

  • Offer valid in the Lower 48 States only
  • Excludes Complete Bicycles, Framesets, and some other oversize items
  • Excludes certain sale items

Small Parts Seatpost

Some carbon, steel, and titanium bikes are made with an integrated seatpost (ISP) design. These systems have an extension above the toptube that take the place of a seatpost and require a mount system that allows the rider to install a saddle. Hence, the Ritchey WCS Seat Mast Topper, a set-up developed for specific outside diameter round extended seattubes. Ritchey has offered this system in 3 sizes, and it is currently available for 30.25mm and 34.9mm round OD masts.

The seatpost comes with a standard 1-bolt clamp to fit all 7x7 rails and Ritchey does offer clamp kits for all other rail diameters/shapes. Please be sure to use the correct size for each saddle or you may experience slippage.

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  • ISP-style seat mast topper for round seattube extensions, featuring Ritchey's single-bolt rail clamp design
  • Material: 2014 Alloy
  • Total length (for tube depth): 70mm (minimum insertion: 32.5mm
  • Offset: 25mm (30.25mm and 34.9mm diameters)
  • Single seat collar bolt design
  • Saddle clamp: 7x7mm round saddle rails (simple clamp plates options sold separately for oval rails)
  • Torque specs: Saddle clamp 12Nm (max) / Seat collar torque: 5Nm (max)
  • Offset: 25mm (30.25mm and 34.9mm diameters)
  • Diameter options: 30.25mm 34.9mm
  • Color: High-polish black, WCS logo
  • Weight: 116 grams (30.25mm/25mm offset)
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