yes and no
Using shims means you need to re-adjust the seatpost every couple weeks (3-4) if you are a frequent rider...I had the same problem as you, however it wasn't so pronounced I only had about 2 mms of difference...I chopped up some old shade slats and used 6" lengths about 10 total surrounding the seatpost...If I ever had to adjust the seat, I had to hold the shim(s) tightly aorund the post so none slipped down into the seat-tube...other than that, I can't recall anything that went necessarily wrong with the shims. HOWEVER, the specific shim design you spoke of...I'd be careful, you need to have a rigid steel shim for that kind of situation, if its plastic or anything, stay away, becasue one hard sitting and you're headed down...this can be disastrous...I had it happen to me when I was 'testing' my shims...SpinWheelz said:I'm after a great deal on a seatpost. Problem is, it doesn't come in the size that I need, which is a 31.6mm. The seatpost is only in 27.2mm size. However, the retailer also sells a seatpost shim that supposedly adapts a 27.2mm post to fit 31.6mm. Any concern about using a shim with a seatpost? If I need to raise or lower the seatpost depending on my situation, will the shim present any problems, convenience-wise or otherwise?
Thanks a mil!