Don't mean to split the hair- just trying to help avaoid any disapontment and confusion. . . unless its something very odd and rare, the blue post shoudl be a 31.6. 31.4 was never a production size. There were one or two protos, but they were pewter.. Earlier posts didn't have the size marked on them, but they shoudlbe measuring up around 31.55mm diameter. .Pace":3pv35e9j said:Blue Ringle Seatpost - 31.4mm 300mm long (looks like it has been cut down at some stage - not by me) some marks from mounting but decent conditon and blue is still quite strong - £50 posted to UK