Gus /Susie bottom bracket -which one?

[Richard Rose]

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?

[Garth]

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 .....

[Richard Rose]

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.

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On Feb 22, 2024, at 3:12 PM, Garth <gart...@gmail.com> wrote:



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[R. Alexis]

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

[Richard Rose]

Thanks Regi. The BB I have on the Gus does work fine. I recently replaced the Shimano BB on my Clem (it felt very stiff) after 7,000 miles of service with a Stronglight unit from Peter White. I was shocked how much smother it is. This got me thinking about replacing the same Shimano unit on my Gus that only has about 1,600 miles use. One of the IRD higher end units (UN-95?) came up for sale here in the proper spindle width (122.5) that caught my eye. It is a 68mm unit but those conversion cups would take care of that. However I am still confused by the Riv suggestion that you need a bb with the driveside spacer or offset spindle. As in, is it sufficient to get a bb with a 122-123 spindle or does it have to be offset. I am guessing this all has to do with chainline & chainring clearance particularly with wider tires?

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On Feb 22, 2024, at 11:42 PM, R. Alexis <noj...@webtv.net> wrote:

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. 

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[Kim H.]

@Richard -

Do you know of the model serial number of the Stronglight BB that you bought from Peter White Cycles for your Clem ? ... providing that you have not changed up your stock SILVER double 34/24T rings and spindle length.

From the information that you have shared, I am concerned about my BB on my Clem not being buttery smooth from the stock Shimano BB and having perhaps a lot of drag.

Thank-you.

Kim Hetzel.

[Richard Rose]

Kim, I do have it & will dig it up tomorrow. By the way, my Shimano bb felt fine until I removed the crank & spun the bottom bracket by hand. It was not “crunchy” as others have described. It was stiff though & felt kind of “notchy”, almost indexed. I had put almost 7,000 miles on it so figured now was the time. The new one is really smooth.

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On Feb 23, 2024, at 10:46 PM, Kim H. <krhe...@gmail.com> wrote:



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[Kim H.]

@Richard -

Thank-you.

Yes, I know that I do not have as many miles on my Clem's BB as you did, since the bicycle was from the 2023 production and a "Demo-bike" at RBW headquarters. I am just concerned about how my BB feels upon pulliing it off here in the near future. I want a smooth running drive train.

Kim Hetzel

The frogs are singing in the night air and the daffodils are showing their blooms of spring !

[Richard Rose]

Good Morning! Attached here is a pic from Peter White website. BTW, I called, Peter answered & after a nice conversation I ordered over the phone. It arrived in two days. Nice transaction for sure. Also, these bottom brackets came highly recommended by Analog Cycles - good enough for me.:)

The Shimano bb that I replaced was a 118, this Stronglight is 119. I ordered the more expensive one with the aluminum vs. plastic cups. Still just $50.00! And you are correct, I did not change anything else.

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[Patrick Moore]

It's good to know that these SL bbs are recommended by a knowledgeable professional -- well, since Peter carries them, that is probably recommendation in itself. I ordered one myself yesterday, a 127 mm to try to skim off a few mm of the Q on my Matthews "road bike for dirt" -- with the current 130 mm Phil there are about 3 mm of unused airspace between the inside of the left arm and the outside of the stay. Must also try that NOS 125 mm SunTour Greaseguard bb, but I fear that even with right arm skimming the stay on its side -- as it is with proper chainline -- the left arm will still rub.

May soon have a NOS/NIB ST GG bb bearing assembly for sale ....

Alas, the 127s are available only with plastic cups, but iboblist scuttlebutt says that they hold up fine, and Peter said he could not recall ever having problems with them. Still, I'd have preferred metal for aesthetic, philosophical, and moral reasons.

[Patrick Moore]

Oh, and yes, very genial transaction between Peter and his order assistant whose name I forget.

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[Kim H.]

@Richard-

I thank you very much for providing the specific details of which BB you bought from Peter White Cycles that works for your Clem. I appreciate it.

$50.00...that's very affordable  !

Kim Hetzel. 

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[Richard Rose]

Silver wide/low standard issue.

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On Feb 24, 2024, at 11:46 AM, Kris Burns <krisbu...@gmail.com> wrote:

What crankset are you using?

On Thursday, February 22, 2024 at 12:14:10 PM UTC-6 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?

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[Richard Rose]

This issue (crank arm proper clearance) befuddles me also. With the Riv supplied Nitto brackets on both my Clem & Gus I have HUGE clearance. Small ring has plenty also. Clearly I could use a shorter spindle. Perhaps there is an issue with tire rub on these bikes? Running 55mm tires on Clem, 2.6” on Gus.

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On Feb 24, 2024, at 11:48 AM, Patrick Moore <bert...@gmail.com> wrote:



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[Richard Rose]

Oops! Shimano bottom brackets, not Nitto!

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On Feb 24, 2024, at 6:26 PM, Richard Rose <rmro...@gmail.com> wrote:

This issue (crank arm proper clearance) befuddles me also. With the Riv supplied Nitto brackets on both my Clem & Gus I have HUGE clearance. Small ring has plenty also. Clearly I could use a shorter spindle. Perhaps there is an issue with tire rub on these bikes? Running 55mm tires on Clem, 2.6” on Gus.

[Kim H.]

@Patrick-

Penny is the employee's name that you have forgotten. 

Kim Hetzel. 

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