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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

Road Seatposts

Cervelo R Series Carbon Seatpost Shaft

Some of the R and C series framesets from Cervelo currently feature a seattube for 27.2mm seatposts. Given the slope of the frame designs Cervelo generally recommends a 350mm or longer carbon seatpost for the best ride quality and safety. Their UD carbon SP-19 monocoque carbon post is the stock option that Cervelo generally ships with their complete R3 and C3 series bikes. Available as both zero offset and 25mm setback options, this seatpost shaft, plus the clamping mechanism (sold separately), offers a great range for seat angle adjustment that offers complete freedom of set-up with most rail sizes and materials


  • Carbon seatpost shaft by Cervelo, commonly used on most round seattube R3 and C3 series bikes
  • UD carbon construction with some vertical compliance, vibration damping
  • Two bolt fore-aft head design for freedom of angle set-up (sold separately)
  • Available in 27.2 diameter, in Zero offset or 25mm setback, 350mm length
  • Finish: Matte carbon