We did actually make an improvement to the Delta Sonic. We started including this clamp in all Delta Sonic and Delta Sonic XL models. This adds more material as you mention in your other post. If you have one of these models, I am happy to send you out a clamp free of charge to help stabiliize it.

Note, technically this clamp is only necessary for Cervelo seatposts, but if you have say a Scott, BH or another brand, you can use the clamp for peace of mind. We have not seen any other damage on other brands that have this 10mm rail seatpost.

Since introducing this clamp, we have had 0 issues with this clamp on there.

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Candice Turner
CEO
XLAB - Aerodynamic Triathlon Accessories
Dawn to Dusk - Off-road Specific Storage Accessories
http://www.XLAB-USA.com http://www.dawntodusk.bike