Originally Posted by Eric F

I recently had tasks that required a bearing press (PF bottom bracket and freehub bearing replacement), so I bought the tool. I also needed to align a bent derailleur hanger, so I bought that tool, too. I checked the hangers on all my bikes, and every one needed at least a little tweak. I love how smooth and quick shifting is when everything is aligned correctly. I enjoy having an excuse to buy new tools.