On Mon, 9 Jul 2018 15:26:18 -0400, Frank Krygowski
wrote:
Actually, the OP was talking about drilling and tapping instead of
Rivnuts. And it wasn't clear to me, at least, exactly what portions of
the frame he was interested in tapping. A photo or two might help.

He started out talking about drilling and tapping, but switched in
midstream to Rivnuts. See:
https://groups.google.com/d/msg/rec.bicycles.tech/Cx1f1zC9TsM/uWXvnWNGBQAJ
I keep hearing this, but it isn't the case for
my bikes which have chainguards.

These have three stays, and of those, two are
mounted on the bike frame with M5 screws.
Threaded hole, no nut on the other side!

Then the chainguard is mounted on the stays,
likewise with M5s, threaded holes (only here
sometimes there are nuts as well).

The stays are about 1mm. How thick the frame
tube wall is I don't know, but I can take
a discarded frame and cut it with an angle
grinder to find out, God willing.

This ain't to say that rivnuts ain't a good
idea, of course.

This was the first mention of Rivnuts in the thread (I checked).

Also note that he indicates that "the chainguard is mounted on the
stays...". Which of the stays, he doesn't mention, but it doesn't
matter. Chain stays and seat stays are both rather small diameter.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558