check the binder bolt...sometimes they bottom out or touch sides and it may seem tight but once on the bike. it will gradually lower. Just a thought...
Walter Skrzypek
Falls Creek, Pa
> Emanuel writes:-What are the possible reasons for my seatpost sliding down
> slightly but definitely while riding? Never had this problem before -- but
> have been using the same post for 25+ years and the bike was service
> recently
>
> Too many burgers?
>
> Ray Green, Brighton, England
>
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