Looking at IRD website the IRD Quad has a 73mm conversion cups and a conversion washer to change the 68 to a 73. Bottom brackets without a shoulder can be mounted to work with both 68 and 73mm bottom brackets. The bottom bracket would fit further in the shell. I did this with a TruVativ Powerspline bottom bracket. Had the shoulder machined off the 68mm driver side to fit further in the 73mm bottom bracket. The person that took it to have it machined didn't know to leave the tool mounting splines. I ended up putting spanner pins in to install.
Does the current spindle length work and fit for your use? Do both the arms and chainring clear sufficiently? Are you changing cranks? I know that on my SunTour cranks with 110/74 BCD and 175mm length I think they specify possibly a 125 or 127mm spindle, but 122.5mm spindles have fit fine on my bikes. Only bike using 127mm is the Schwinn High Plains Aluminum. Thanks, Reginald Alexis On Thursday, February 22, 2024 at 3:20:18 PM UTC-6 rmro...@gmail.com wrote: > Well, now I feel stupid. I did not scroll enough. Riv does indeed sell > 73mm bottom brackets & one of them has the 2.5 drive side spacer. I presume > that one is offered for the Gus/Susie frames. I still don’t see how one of > the IRD bb could work at only 68mm. > Sent from my iPhone > > On Feb 22, 2024, at 3:12 PM, Garth <gart...@gmail.com> wrote: > > > > I see their web catalog explanations are as clear as mud ! Maybe that's > why they couldn't convey it to you either. They have 73mm UN55's but no > explanations, only this... > > 113, 118 > > 122.5 x 73, 48.8 chainline > > 123, B23X, Right +2.5mm > sigh ..... > > This can't work for the Silver crank on a Susie ? > Well WHY ? .... simple question ... -:) > > Just being honest, I tend not to want to deal with people that aren't able > to give clear answers to my direct questions, or don't have the wits to ask > me to clarify the questions, to be more specific to get a more specific > answer. "Explain so a child can understand it" never seems to fail. "Why ?" > can never be asked enough as far as I'm concerned. So to all those > inquisitives asking repeatedly WHY ?.....I tip my hat to you in > gratitude.... Y-Not ! > > I can't give you a specific answer about your crank/bb as much as I may > wish to as I'm not a mind reader seeing things as they do. I have a stock > of various length cartridges on hand and a bag of various spacers and I > play around with the combo that suits where I want the crank to be in > relation to the frame. Why ? :-) Because someone can "recommend" a certain > setup and it be perfect from their perspective. That may or may not apply > to anyone else though. It's no different that a mfr. spec'ing a certain > spindle or chainline. It's proper from their perspective setting up, but > doesn't apply to all the various possibilities otherwise. It is what it > is.... let it go and do what you gotta do.. always with a smile ..... > > > > On Thursday, February 22, 2024 at 1:14:10 PM UTC-5 rmro...@gmail.com > wrote: > >> I asked about this when I bought my Gus and got no conclusive answers. I >> really did not get a conclusive answer from Riv either. When I ordered a >> bunch of components from Riv for my Gus build the answer I got about what >> BB to get went something like " we will look into it and send you the right >> one". The one I got does work but the box it came in does not give me the >> information I seek. >> Here are my questions. Gus and Susie have 73 shells. Riv does not list 73 >> bb's for sale. And they suggest which 68mm IRD one to get for your >> Gus/Susie - 123 width with right side spacer(?). Am I to conclude that 68mm >> bottom brackets work on a 73mm shell? An Tange bb has become available that >> is a 68mm with a 122.5 spindle. Will it work on my Gus. What about the >> drive side spacer? >> Please excuse my ignorance. I would like to upgrade my bottom bracket and >> really have no idea what will fit best. I gather a lot of different spindle >> lengths will work but not ideally? >> > -- > 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/76ac1f10-6aeb-48b2-94eb-130c8ede7915n%40googlegroups.com > > <https://groups.google.com/d/msgid/rbw-owners-bunch/76ac1f10-6aeb-48b2-94eb-130c8ede7915n%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/3dbd8e78-34bc-41f0-8c52-065947fc271an%40googlegroups.com.
