While reading through this thread discussion something kept going on the the back of my mind, like I'd seen something about the steering tube butting somewhere on the Web. So I finally browsed through some of Sheldon's articles and found this:
*Note:* Steerers <http://sheldonbrown.com/gloss_st-z.html#steerer> are butted <http://sheldonbrown.com/gloss_bo-z.html#butted> at the bottom, so the hole in the steerer is constant-diameter until near the bottom, then the walls taper inward in the butted section. It is *vitally important* that the stem extender (or stem) not be inserted so far that the wedge is installed where the steerer is narrowing, or it could come loose unpredictably. When this happens, only the edge/corner of the quill or wedge contacts the steerer, and it is trying to "grab" a slanted surface. This is sometimes a problem on smaller frames if you try to insert the stem or a stem riser too far down into the steerer. [image: Stem Inserted Too Far] Illustration by Nicholas Flower On Monday, March 28, 2016 at 6:46:12 PM UTC-5, Frank Conway wrote: > > I'm trying to put a fairly long Technomic stem in my Heron and it is only > going about halfway down the steerer tube. It didn't seem rusty or > anything, but I cleaned it up and tried taking a few thousandths off or > knocking off any high spots with a brake cylinder hone. It's nice and shiny > now but to no avail. Anyone encounter this before? If so, how'd you fix > it? > > Thanks, > > Frank Conway > > Bedford, NH > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
