Originally Posted by
Sobeisdead
I have a Steel DeRosa currently with a 27.2 seat post which works fine however I've had people tell me that I'm using the wrong one since the "ears" touch. I personally think that's just the design but unsure. Any thoughts?
I'd remove the post, insert a large flat bladed screwdriver between the ears from the inside and pry gently* until the faces are parallel, also the slot. Check with a finger for any bumps or jaggies around the slot that need tapping/filing out of the way (there may be a slight ripple around the edge of the lug, but no more than that). Then try a 27.4 seatpost. Or a larger 27.2 seatpost - the current one may be undersized.
* Warning - possibility of paint damage, but you already have some touching up to do so no big deal.