Hi, the frame is a Siren Song soft-tail with 40mm of travel and was designed around 650B wheels. It's a medium, like most medium frames it has a 23" toptube (eff), seat-tube is 17" to top of top-tube but the full length is 21" (makes sense in the pic). Weight is 4.8lbs.
The front triangle is a brand new, warranty replacement but the rear is two years old. This one is made from Easton Ultralite 7005 instead of the Scandium like the original. The head tube is 1.1/8th but the length was made so that you can use a Lefty with a Chris King headset and not use any spacers. The geometry of the frame was designed so that you can use any fork with a 470-480mm A to C height though (Most 100-120mm forks).
The B/B shell is PF30, designed for narrow Q-factor SRAM chainsets but I'll include an adapter for using a normal B/B.
The rear works off a titanium flex plate, located behind the B/B shell and uses a Cane Creek, Cloud Nine air shock. As you can see in the pics, the seat stays are Ti too. There is a small mark on the right-hand side of the brace and a little scratching on the same side chainstay.
To import a new one of these frames from the US would cost around £2000. If they still made them that is...they reluctantly had to stop making them as Cane Creek no longer make the shocks. Seals for them will still be available from CC, the kit is just 3 O-rings anyway.
Anyone who has seen the film 'Ride the Divide' may know about Siren Cycles, as the first woman to do it, Mary Metcalf-Collier, did it on a Song. She is also married to the owner/builder, Brendan Collier who used to be behind research and design at Intense.
Note: The 4th picture is an example of one built up, it's not the actual bike!
I'm after £400 including postage. No offers. It includes the BB adapter and a Salsa seatpost clamp.
Any questions, just fire away. If you're interested I can send you a link to more pictures.
An example of one built up.
Thanks for looking.