Specialized Saddle Rails / Clamp

[cbrshadow]

I'm putting together a new bike (2018 S-Works Venge Vias Disc) and purchased a "Specialized Power Elite". Today I tried installing it and can't get the saddle to stay in position firmly. Am I doing something wrong, or do I have the wrong clamp/saddle rail combo? Are there multiple clamp sizes on these bikes?

I believe this is the clamp I have:
https://www.specialized.com/us/en/anodi ... 989-130890


Here are some pictures. Even with the bolt torqued down the saddle still rocks forward and backward.

[marioc]

If it's the same clamp from the link you posted, it looks like the clamp is for 7mm round and carbon oval rails. Try to turn clamp.

[sychen]

Wrong clamp size for that saddle.
The frame should come with one clamp for 7mm rails and one for 7x9mm(oval) rails.

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[moyboy]

yeah, the power elite / expert won't have the carbon rails on it.... which are 7 x 9. It will have Ti rails 7 x 7