This pic shows how far into the head tube my stem currently extends. The minimum insertion line is 2 cm below the lock nut. FWIW, I do not notice any movement riding the bike. I only notice it straddling the bike, feet on the ground & putting my full weight into the grip area of my Bosco bars.
https://photos.app.goo.gl/JTDqwkr1dqxW6TJd6 On Wednesday, September 6, 2023 at 8:32:50 PM UTC-4 Richard Rose wrote: > Garth, thanks but not certain I understand. You say (I think) minimum > insertion is “always to top of lock nut”. My minimum insertion mark is 2cm > below top of lock nut. The quill goes quite a bit deeper to well below top > of steer tube. I will remove to get an accurate measurement but it is quite > long. If I read your response correctly you are thinking the entire stem is > only 2cm below the top of the lock nut, which of course would be very bad. > > Sent from my iPhone > > On Sep 6, 2023, at 7:36 PM, Garth <gart...@gmail.com> wrote: > > > > Okay, I see what's happening :) Richard, the min insertion for a stem is > always marked on the stem, and it's to the top of the lock nut. The min > insertion line on my stems on hand range from 6.5cm for a relatively short > Nitto quill adapter to 7.5cm for taller Genetic brand one. My tall Nitto > Faceplatter stem is about 7cm. > > 2 cm below the lock nut is quite insufficient, as in "Danger Danger Will > Robinson !" That "may" explain the wiggle, not being in far enough. When > it's in to at least the min insertion line there should not be any wiggle > at all, as in zero. Stems shouldn't move when tightened, like seatposts. > > If your stem isn't tall enough, tell me exactly which one you have. I have > an unused Nitto HighRiser, the original ones Riv had made in 135mm > extension @10 degree up and a 31.8 clamp that I'll see you if you need it. > 31.8 to 25.4 shims are common.Those high risers with the long quill and > positive rise are as tall as you're gonna get out of a one piece stem. If > that isn't high enough then the bike is too small ! Buy hey, if you ride a > 59 I'll sell you my unused original orange Susie if you like as it has a > much taller stack than any other RIv model. Too tall for me, I'd need a > negative 75d stem.... hah hah . > > If the stem still wiggles when inserted to proper depth then the steering > tube is out of spec. If that's the case, Riv will help you out ! > > > FWIW, I bought a VO Rando frame that arrived yesterday and today got an > email stating the rear recessed brake holes were made too small. So yeah, > "stuff happens" even with "professionals". > > > -- > 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-bun...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/rbw-owners-bunch/7701d47b-291a-4846-a882-f60858976662n%40googlegroups.com > > <https://groups.google.com/d/msgid/rbw-owners-bunch/7701d47b-291a-4846-a882-f60858976662n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/59273ec0-0408-4d8b-9363-6d566d0c69c0n%40googlegroups.com.
