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Dura Ace bearings? ( DA 7400 bottom bracket)

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Dura Ace bearings? ( DA 7400 bottom bracket)

Old 10-29-13, 11:06 AM
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Dura Ace bearings? ( DA 7400 bottom bracket)

Hello all,

I'm working on a Dura Ace 7400 bottom bracket and I'm looking to replace the bearings. I was at my LBS yesterday (without my parts) and was looking around at what was offered. They pretty much told me that there really isn't any "quality" bearings I can get. They mentioned ceramics but that's not what I had in mind. So is there any bearings I should be looking at and any I should be staying away from?

Thanks for any and all responses. They will always be most welcomed.
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Old 10-29-13, 11:43 AM
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.. as a Loose Ball cup and cone BB you just need to get a set of fresh Bearing Balls of same size
[typically 0.25"]

[aside]Decades ago, I got a thousand grade 25 in a small bag At an Industrial Bearing Supply stores*
rather than Bike shops, for my own use, (* LA/Long Beach there will be several)

but working in Bike shops the ordering of a plastic jar of them is convenient ,
and they come with the rest of the parts orders.]


NOW, If the races on the axle , and the cups in the frame are unDamaged..
to determine this, you have to clean them
and inspect.

leave the right / fixed cup in place, unless damaged, it does not have to come out..

Last edited by fietsbob; 10-29-13 at 11:53 AM.
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Old 10-29-13, 01:32 PM
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Grade 25 1/4" steel balls should be a stock item at any decent bike shop. If your shop doesn't have them, it's time to find a better shop.
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Old 10-29-13, 01:32 PM
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Originally Posted by JohnDThompson
Grade 25 1/4" balls should be a stock item at any decent bike shop. If your shop doesn't have them, it's time to find a better shop.
+1000
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Old 10-29-13, 01:33 PM
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Originally Posted by User1
Hello all,

I'm working on a Dura Ace 7400 bottom bracket and I'm looking to replace the bearings. I was at my LBS yesterday (without my parts) and was looking around at what was offered. They pretty much told me that there really isn't any "quality" bearings I can get. They mentioned ceramics but that's not what I had in mind. So is there any bearings I should be looking at and any I should be staying away from?

Thanks for any and all responses. They will always be most welcomed.
The "bearings" are the bottom bracket and spindle themselves. All you need is a set of 1/4" balls, and some grease. I can't believe that the shop didn't have these for you, and ceramic balls would cost you more and not help since it's the races (spindle and cups) that wear, not the balls.

Shop around and buy a bag of Grade 25 1/4" balls (confirm size), and load them loose using the grease to keep them home until the spindle is in. Grade 25 is way better than necessary, but the difference in cost is small enough that you might as well go 1st class. The retainer doesn't serve any function save for ease and speed in assembly.

As said above, leave the left cup in place, and simply clean the inside thoroughly.
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Old 10-29-13, 03:47 PM
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Originally Posted by FBinNY
The "bearings" are the bottom bracket and spindle themselves. All you need is a set of 1/4" balls, and some grease. I can't believe that the shop didn't have these for you, and ceramic balls would cost you more and not help since it's the races (spindle and cups) that wear, not the balls.
Sorry, I didn't mean to lead on that the shop didn't have the bearings. I just didn't have my parts with me when I stopped in. Thought I'd just shop around. I'm sure what they showed me is what I'm going to pick up. I'll call around for the grade 25 bearings and see anyone has these first.

Thanks everyone for the feedback. Most helpful!
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Old 10-29-13, 05:18 PM
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The shop saying there aren't any "quality bearings" and suggesting ceramic says they have no idea what they're talking about. Go to a different shop.

I buy grade 25 balls on ebay, I got a 150 count bottle for $10 or something. Enough to do several BBs and hubs.
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Old 10-30-13, 07:18 AM
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Originally Posted by FBinNY
leave the left cup in place
LOL, FB works on his bikes upside-down

Hang on, it's FB here...

/googles manual page

Yeah, what I said


...No, wait - that could be some sly old-timery workaround to avoid adjusting the BB again.

Damn you, FB!

/shakes fist

One day!

Last edited by Kimmo; 10-30-13 at 07:24 AM.
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