I've never had a shimmy and ride w/lots of weight on my rack but I ride a 50 and I have bags so I try to get ,my loaded weight down as low as possible to lower my center of gravity. The basket keeps it up high in addition to you already having a high center of gravity on a 60. Maybe I've never noticed a shimmy b/c I rarely ride no hands and certainly not w/heavy loads. I used to have a front basket on the front on a bike and it never handled well this the rack and panniers set up I have now. Or w/heavier loads I use a Burley Travoy getting the weight even lower and only trailing.
On Friday, November 28, 2025 at 2:30:03 PM UTC-5 Gregory Johnson wrote: > Chris, > > Another option is to try a different rack. > > > > > > On Thu, Nov 27, 2025, 1:41 PM Christopher Young <[email protected]> wrote: > >> BTW, to be fair to the Riv guys, as part of my attempt to fix this >> problem, I also moved the back strut attachment points up a little from the >> attachment points right at the dropout to the next ones, a few inches >> higher. I was thinking that would make them a little shorter/stiffer and >> make the angle a little different, but it didn't help. >> >> Chris >> >> On Thursday, November 27, 2025 at 2:36:51 PM UTC-7 Christopher Young >> wrote: >> >>> Thanks Eric! I think your assessment is right. Looking at this rack >>> installation vs. others, what really stands out are those very long >>> vertical struts, which don't form anything like a triangle (though there is >>> a diving board attachment, so 5 total contacts with the frame). Anyway, I >>> like your solution, but there is an issue that might not be apparent from >>> the photo. There are indeed attachment points higher up on the seatstays, >>> but they blocked by the brake, which sticks out a bit on either side. It's >>> going to take some pretty creative bending (a bend one way and then another >>> back) to get those struts to attach to those upper points. I'm thinking it >>> can be done, but was wondering if anyone else had already dealt with this >>> on an AHH so I don't end up demonstrating how poorly I can bend struts. >>> Ironically, I installed a rack (I think the same model) on my wife's 60 cm >>> Platy and because it has V brakes that aren't in the way I was able to have >>> the upper/forward struts go almost horizontally from the front of the rack >>> to the seatstays, so no bending. It doesn't look as elegant as this >>> installation, but it definitely has that triangular strut setup and she >>> doesn't have any vibration from the rack. >>> >>> Something I tried but that didn't fix it was to lower the rack a bit (no >>> fender, so plenty of clearance) and I brought it forward, sliding more of >>> the diving board under the rack. I hoped that might make that connections >>> shorter/stronger and stiffen things, but if it did, it wasn't enough. >>> >>> I will not be too upset if going for a Sackville Bagboy is a good >>> solution (just looking for an excuse to buy one of those). For this bike, I >>> think that would look really nice and then the rack is just a backup to >>> keep the bag of the wheel. >>> >>> Chris >>> On Thursday, November 27, 2025 at 2:09:37 PM UTC-7 Eric Daume wrote: >>> >>>> Riv did a poor job of installing that rack. The forward struts should >>>> go to the forward/upper attachment points on the seatstays. That will >>>> increase the triangulation and stability. >>>> >>>> Eric >>>> >>>> On Thu, Nov 27, 2025 at 2:56 PM Christopher Young <[email protected]> >>>> wrote: >>>> >>>>> Hi All, >>>>> >>>>> I have a 61.5 cm AHH with a rear rack installed by Riv when I bought >>>>> the bike. The rack looks great, but I've noticed that when I have it >>>>> loaded, I often get a front-end shimmy when I am riding fast and take my >>>>> hands of the grips, and people riding behind me have confirmed the rack >>>>> is >>>>> moving a lot. It sounds exactly like what Paul M described in a 2024 post >>>>> about his 64 cm Clem: >>>>> "I also experienced a front-end shimmy if I took both hands off the >>>>> handlebars with a loaded rear rack trunk mounted on the top of the rack". >>>>> Exactly!! >>>>> >>>>> Because of the size of the frame and the way it's installed (see >>>>> picture), my theory is that those vertical supports are very long and >>>>> hence >>>>> not so rigid and I'm getting some sort of harmonic motion (like a >>>>> mini-version of the Tacoma Narrows bridge). Anyway, I've tried some minor >>>>> adjustments to try to make the rack supports shorter and hence more >>>>> rigid, >>>>> but with only minor (if any success). At this point, I'm thinking of a >>>>> couple of options: >>>>> 1. more radically changing the attachment points for the rack to get >>>>> those longer supports a lot shorter. This could get tricky though, >>>>> working >>>>> around the rear brake. >>>>> 2. Removing the basket (it can go on my newly acquired 64 cm Clem L) >>>>> and changing to a rear bag (e.g. Sackville Bagboy) that hangs from the >>>>> saddle and hence doesn't really rest all its weight on the rack. I can >>>>> still strap lighter stuff on the rack. >>>>> >>>>> I'm strongly leaning toward option #2 because I like the look of the >>>>> rack as is and I think the behind the seat bag might look very nice. I >>>>> guess another option is to install a different rear rack with more rigid >>>>> supports, but again, I like the look of this rack and this isn't my bike >>>>> for hauling heaving loads (that's be the Clem). >>>>> >>>>> Have others experienced this sort of problem and if so, how did you >>>>> fix it? >>>>> >>>>> thanks >>>>> >>>>> Chris Young >>>>> ABQ >>>>> >>>>> -- >>>>> 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 [email protected]. >>>>> To view this discussion visit >>>>> https://groups.google.com/d/msgid/rbw-owners-bunch/b0c1484f-a662-4193-8f21-d74e892a3a71n%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/rbw-owners-bunch/b0c1484f-a662-4193-8f21-d74e892a3a71n%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 [email protected]. >> > To view this discussion visit >> https://groups.google.com/d/msgid/rbw-owners-bunch/e07cb869-3f31-4799-ab40-258612b0a2ean%40googlegroups.com >> >> <https://groups.google.com/d/msgid/rbw-owners-bunch/e07cb869-3f31-4799-ab40-258612b0a2ean%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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