yes communication does get wonky. the original post was regarding a bBridgestone MB-5. the specs for it call for a 27.0 seat post. the poster had said that what was in it was a 26.2 at which point 'treksandra' got involved saying she also needed a 26.2. the bikes and the their seatpost sizes have nothing to do with each other. in the catalogue for the Raleighs in 1985 the sport touring group, i believe, had a number of models in it. one of them was the 'Marathon' another was the Olympian. The seatpost size for the olympian according to sheldon brown's seat post data base is 26.6. and is likely the closest to what is spec'd foor the marathon. i don't know where anyone got the idea that anyone was talking about putting a 27.0 seatpost in the Raleigh Marathon. the talk around the 27.0 was soley to do with the Bridgestone. Clear as mud now, right. But it covers da ground.