Original Ridley Kanzo Fast Seatpost: Clamps and Torque Entries
Ridley Kanzo Fast seatpost information here concerns the original platform introduced in 2020, not Kanzo Fast 2.0. Its frame passport names a dedicated aero seatpost with 6 mm setback and distinguishes the internal seatpost clamp from the saddle-rail clamp. These original-generation parts and torque entries do not establish compatibility or assembly settings for the separate 2.0 platform.
Ridley Kanzo Fast seatpost and the internal clamp
The passport identifies the internal seatpost-clamp part as SPCAER4ZA007 and gives a maximum torque setting of 10 Nm for that clamp. This is the seatpost connection, not the saddle-rail clamp above it. Retain that distinction when identifying a part or seeking workshop guidance.
The dedicated aero-post description also differs from the Kanzo Adventure 7E7 passport’s round 27.2 mm post entry. That Adventure dimension is not a replacement diameter for the Fast. The cited Fast table does not establish that an arbitrary round post can substitute for the named aero post.
The saddle rails determine a different clamp choice
For round rails, the Fast passport names a Ritchey 7×7 mm clamp without slider, code SACWCSRIT003. It separately lists a 7×9.6 mm oval-carbon-rail clamp, SACWCSRIT004, and an 8×8.5 mm oval Fizik rail clamp, SACWCSRIT005. Preserve the exact rail shape and dimensions.
A description such as carbon saddle is therefore insufficient to select the clamp. Identify the rail dimensions and the saddle manufacturer’s requirements before choosing the corresponding part. The passport’s three entries should not be collapsed into one universal oval-rail fitting.
Keep the 12 Nm saddle-clamp entry in its own scope
The passport gives 12 Nm as the maximum saddle-clamp setting, separately from the internal seatpost clamp’s 10 Nm. Neither number is a universal instruction for all bolts or every possible replacement saddle. This guide does not provide an assembly sequence or approve a substituted part.
For a replacement enquiry, specify whether the problem concerns the post-to-frame connection or the rails-to-post connection, then provide the existing part identity. The historical X-Bow photo does not show the documented Fast aero-post system and cannot confirm its setback, clamp parts or permitted settings. The Ridley topic and range introduction give model background alongside this part-identification question.
FAQ
Does the Adventure’s 27.2 mm post entry describe the Kanzo Fast?
No. The Fast passport names its own dedicated aero seatpost.
Are the two oval-rail clamp entries interchangeable descriptions?
No. They list different rail dimensions and distinct part codes.
Does the 12 Nm entry apply to the internal seatpost clamp?
No. The passport separately lists 10 Nm for that connection.
Sources
Manufacturer records for Ridley Kanzo Fast seatpost: Kanzo Fast frame passport (https://www.ridley-bikes.com/en_US/support/folders/63000157885/article/63000256221). Kanzo Adventure 7E7 frame passport (https://www.ridley-bikes.com/en_US/support/folders/63000157885/article/63000271987). Retrieved 28 October 2026. The historical photograph is credited separately above and below.
Seatpost generation reference: Kanzo Fast 2.0 manufacturer announcement (https://www.ridley-bikes.com/en_US/news/article/156439). The assembly entries discussed here belong to the earlier passport. Retrieved 29 October 2026.
Photograph credits and permissions
Photograph 1
Original title: Ridley.jpg
Creator: Pinguinsen
Original source URI: https://commons.wikimedia.org/wiki/File:Ridley.jpg
License / permission: CC BY-SA 4.0
License / permission URI: https://creativecommons.org/licenses/by-sa/4.0/
Modification notice: Original 800×600 JPEG used without cropping, retouching or re-encoding by this publisher. Photograph remains under CC BY-SA 4.0.