Seat post sizing

[letmetalktomark]

I have an old 700c frame being built up as a fixie.

Problem is finding a seat post :evil:

I measure the required seatpost as needing to be a 25mm or at a pust 25.4mm.

Could this be correct - I haven't seen many available in this size.

Any help would be most appreciated.

Mark

 

[tintin40]

USE seat pins are 25 with out the shim

 

[elite504]

old TVT carbons and Vitus etc are often 25.0, and yes, thats a use, no ship. For 25.4, you're probably looking at a lot of BMX stuff. . . . or DIY-ing a USE clamp onto some 1" al bar stock, and making a post for your hack bike. . .