BBB Ahead-Adapter BHP-20 Extender - 1 Zoll

I've put few of them on my older bikes when renewing them and found these ok, but there are also flaws to mention. The best feature is the overall length, you get a chance to adjust the stem height which is nice. What they don't clearly disclose is that this is actually not a 1" to 1-1/8" expander, but you need to get a shim elsewhere to fit standard 1-1/8" stems. Product would be better with an expansion shim included or expansion feature built-in. Another issue is the cap on the top, it's just there for decorative purposes, but it has a screw that screws on the end of the quill bolt, which has very weak thread that bear no tightening inside its hex socket - beware when tightening the cap not to ruin the thread, or cap will rattle.