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Cervelo R-Series Seatpost Clamp Pre 2011

OEM seat collar for a Cervelo R series bikes that take a 27.2 seat post. Includes 4mm hex bolt. This is the 4.5 Nm clamp with the bolt in the rear position and works for Cervelo R series bikes that take a 27.2 diameter seat post built prior to 2011.


  • 13 grams
  • Maximum torque 4.5 Nm
  • ID measures 30mm
  • Fits R-Series Cervelos from 2008 to 2010

Does not work on 2011 and newer R-series frame. Those require the 6 Nm clamp with the bolt in the front position and a small flat spot on the back

Sale Price
Reg Price $40.00
Item is in stock


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Average Rating:


Posted on 1/22/2014

It looks good but weak, it broke in 3 months. although the adjustment to the recommended pressure.

Pros Looks nice

Cons Weak