My seat post keeps slipping into the frame as I ride (my seat keeps getting lower). This never used to happen and just started about a week ago. I have a CroMo frame with quick-release for the seat. I really want to leave the quick-release because I have a nice Selle Italia that attracts attention to my bike when I leave it on, and I leave it locked outside in downtown Toronto. Any suggestions?
And yes, I have tried tightening the quick release.