Just picked up frame off here, came with a non qr seatclamp want to replace with qr. No markings on clamp so cant tell what size current clamp is. 34.9 maybe?

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It has all the answers, surprisingly.

Maybe I know nothing… but rclvp – that’s the Van nic one
But as it happens the curved top tube Lynskey ones are also 34.9.
I used a Salsa with great results. The frame does need a fair bit of clamping due to the seatpost tube/shim/seatpost interfaces. Weak clamping results in creaks.

Ooops, my apologies.

my 18″ Ti456 Lynskey is a 34.9 clamp dia. HTH

My Lynskey 456 uses a 27.2 seat post with a 34.9 dia collar.

There’s an in built shim in them so the “bits” form your normal Inbred would fit.

Cheers chaps.