will911":1bs92b6y said:R....plus 1 for 27.. a framebuilder told me that this happened sometimes as they used the wrong end of the seat tube when building the frame,!!! it can also happen when they don't ream or think there will be strength issues when reaming any seat tube after building the frame.. i have had several with this issue.. i'll check and see what i have to hand and bring them with me tomorrow.. will