Current Projects chat and miscellany

Tommmm, with reference to your seatpost woes, me Julie bought an Omega frame that had a heavily cut down and sanded 31.6 post in it.

Transpires that what it needed (and was apparently perfectly standard) was a 30.6mm shim that sits inside the lugged area, and takes a standard sized seatpost.

Would a 27.2 shim go in there, allowing a 26.8 post to be used for example?

I don't think so, there's no ledge or anything implying that a shim should be fitting flush there. Plus the seat cluster and clamp 'ears' are exactly the same as my other Donohue bike which takes a 27.2mm post. I think it is just slightly deformed or rough on the inside. there is a hole on the inside of the seat tube where the top tube joins, and the post seems to be being caught on the upper edge of that.

The 27mm post you can rock back and forth/side to side when it's in the seat tube, but the other doesn't want to go in. I would try it with another seatpost in case that's where the problem is, but the only other one I have to hand is a nice Thomson one.