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Vintage Klein bottom bracket

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Vintage Klein bottom bracket

Old 06-25-08, 08:46 AM
  #1  
velomateo
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Vintage Klein bottom bracket

I helped a friend find a nice used road bike so he could give cycling a try. Yesterday we (he) picked up a nice, early 80's, Klein Stage Race with a combination of Campy and Dura-ace EX components. The bike is around 81-83, the original owner could not recall the exact year he purchased it, but it has a very unique bottom bracket. The bottom bracket appears to pressed in. I did not notice any type of cups at all, just a big sealed bearing staring at me. I asked the owner and he said the frame came that way - he didn't install it. Anybody have any experience with this? I know there will be a request for pictures, and I wish I had one, but the bike is with my friend and he is out of town for next few days. I plan on tuning/cleaning it up when he returns.
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Old 06-25-08, 08:54 AM
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If they need to be replaced you should be able to find replacements... otherwise leave them be. Alot of new bikes like Cannondale super sixs (liquigas team bikes) are using this type of BB now with proprietary cranks....
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Old 06-25-08, 09:09 AM
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The bearings are probably #6003, a simply awesome bearing that lasts just short of forever. Unless the bearings are nasty or you are changing cranks and need a different length spindle, leave it alone.

Bearings are readily available, and Phil can provide spindles if you need one. Square taper only, to the best of my knowledge.
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Old 06-25-08, 09:38 AM
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I think Melville is correct in the nomenclature of the bearings. By "Phil" I presume you mean Phil Wood, Melville? I thought so but it's good to have that confirmation.

I'm interested in this thread because I recently acquired quite a beautiful late '80's road Klein and I'm going thru the same learning process. Don't want to hijack the thread so I'll just say that I'll be watching your progress eagerly. And I'll share what I know/learn. I'm really excited about my new pretty. Everything about it is first class.

Sometimes I will tear down a BB and rebuild it just for the education and to be sure of the condition. But, I'm paying more attention to an old British friend's advice. He said if it feels healthy leave it alone. I guess that takes a little hands-on experience to have the confidence but in the case of my Klein that's exactly what I intend doing.
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Old 06-25-08, 10:16 AM
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Originally Posted by afilado View Post
I think Melville is correct in the nomenclature of the bearings. By "Phil" I presume you mean Phil Wood, Melville? I thought so but it's good to have that confirmation.

I'm interested in this thread because I recently acquired quite a beautiful late '80's road Klein and I'm going thru the same learning process. Don't want to hijack the thread so I'll just say that I'll be watching your progress eagerly. And I'll share what I know/learn. I'm really excited about my new pretty. Everything about it is first class.

Sometimes I will tear down a BB and rebuild it just for the education and to be sure of the condition. But, I'm paying more attention to an old British friend's advice. He said if it feels healthy leave it alone. I guess that takes a little hands-on experience to have the confidence but in the case of my Klein that's exactly what I intend doing.
Precisely. Good pressed-in BBs are I and I parts. The I's are for Install and Ignore. My Viscount FG bike got new 6003s and a Klein spindle in 1992 and is my winter bike, first in Seattle and now here in the wet part of CA.
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Old 06-25-08, 10:56 AM
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The BB feels great and I don't expect it to need service. The bike does have a set Dura-ace EX cranks, with huge pedal spindles. I'm sure my friend wants to use modern pedals and I don't know how available the adapters/reducers are - so I may need to swap out the cranks. Would a little less vintage Dura-ace crank use the same spindle dimension?

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Old 06-25-08, 11:36 AM
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I see the reducers show up on Ebay irregularly. As I recall they sell for around $20, more or less. Certainly cheaper than a good Dura Ace crankset. I've also seen them on some vintage dealers sites.

Is yours EX or aX? I thought that the aX (aero) was the only one with oversize pedal spindle. Shimano also made some of the aX bits in 600 series, I believe. I've got a 600aX crank and pedals on a bike. Also a spare set of NOS Dura Ace aX pedals. LOL. Like I'll ever use them.

I think it's safe to say that most any other Shimano crank will have the standard 9/16 thread opening.

Originally Posted by velomateo View Post
The BB feels great and I don't expect it to need service. The bike does have a set Dura-ace EX cranks, with huge pedal spindles. I'm sure my friend wants to use modern pedals and I don't know how available the adapters/reducers are - so I made need to swap out the cranks. Would a little less vintage Dura-ace crank use the same spindle dimension?
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Old 06-25-08, 11:52 AM
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The Dyna Drive pedal adapters are $33.35 at loosescrews.com.
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Old 06-25-08, 12:12 PM
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EX - AX? Not really sure, if you say AX, that's probably what they are.
Thanks for the link to loosescrew.com...I knew you guys would come through. I'll try and get some pictures up after I get the bike cleaned up. It has some cool old Hi-E hubs laced to the Araya rims with red spoke nipples and a nice set of Cinelli Critium bars with old crest. Thanks again.
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