These are 0.5" steel balls - the "soft polish" version is not hardened and allows one to face, drill and tap. They are not too heavy, and provide
a stout thread. The really ease aligning the post mounts on stays.
And a pic of the new-to-us roadtrip machine. Once this hits the driveway, it is going to be a *major* distraction!
Mtbr's 2016 Winter Biking GearReviews and Roundups
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