Seat Post diameter

fwb2006
Posts: 212
I'm just about to order my new frame (Yeti 575) and on their www its say the seat post diameter is 30.9. Does that mean I need a 30.9 seat post or a slighter narrower one to 'slip inside'?
Cheers
http://www.yeticycles.com/#/ourrides/575/BLACK/
Cheers
http://www.yeticycles.com/#/ourrides/575/BLACK/
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Comments
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30.9 needed!0
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thanks, supersonic, your a star.
As you can tell, gone for the 575!!0