I recently got my 4 year old daughter a 2008 16" Specialized Hotrock (in hiding for Christmas). After a quick cleaning and tune, I decided that the spec was pretty decent except for the steel seatpost.
I searched for a lighter 22.2mm seatpost, but they are very expensive or very heavy (or too short). I decided on an Odyssey Jr. post and scored a good deal on one. Only problem is that the post is only 180mm long. I sized it up to the bike, which I had already adjusted the seat height to my daughter's leg length, and I was already near the recommended max height for the Odyssey post.
So, I ordered some thickwall 6061 aluminum 7/8" OD tubing and dug up an old Syncros hardcore seat clamp that I'd had in my parts bin for a decade.
Since the seat clamp was sized for a 27.2mm post and could not be turned down sufficiently to fit the 22.2mm post, I fabricated a 6061 aluminum adapter sleeve and married the 2 parts together. Everything is bonded together with high strength metal epoxy. A little clunky, but lighter than the steel post.
Here's a comparison. The Odyssey post is 180mm and 152g, the hybrid Syncros post is 235mm and 212g.
I'll post an update once I have it mounted and tested.
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