On Wednesday, November 2, 2016 at 4:31:00 PM UTC-4, wrote:
On Sunday, October 30, 2016 at 12:41:27 PM UTC-6, AMuzi wrote:
On 10/30/2016 12:37 PM, honda.lioness wrote:
On Sunday, October 30, 2016 at 12:08:24 PM UTC-5, AMuzi wrote:
Didn't you write Shimano 600 earlier?

Yes, this is what is printed on the cranks and the gear shift levers. I thought this was a.k.a. "Shimano Dura-Ace."

The classic New Dura Ace BB interchanges with Campagnolo
1046A which is a different taper section than the most
common[1] modern cartridge crank spindles and asymmetric as
well.

Are you saying that the typical modern cartridge crank will not fit my bike? Also that I need an asymetric cartridge and this will cost me more?

What does the Campagnolo 1046A have to do with this?

If it's a BB7400 I would rebuild it or have that done. Nice
product well worth keeping IMHO.

Is "7400" going to be stamped on the bottom bracket somewhere and evident when I take the BB apart?


[1]There are good cartridge replacements but not for $15


That's fine. But from what you wrote, now I cannot tell whether one even exists for my Vitus 979.


Your New 600 cranks will be stamped FC-6207, FC-6208 or
similar on each arm. The New Dura Ace arms will read
FC-7400, FC-7401 or similar. Matching crank bearings will
share the crank number series, BB-6207, BB-7400 etc. When
you know what you actually have advice will be straightforward.

New Dura Ace crank bearing assemblies are an exact
interchange to Campagnolo 1046A Nuovo Record which was
considered a feature at the time as there was such a large
installed base of replacement parts across many brands for
that format. Shimano 600 is different in taper section and
spindle format.

When you say "New 600 cranks," I am not sure what you mean by "New." I am not looking to replace the cranks. I only want to replace or rebuild the bottom bracket.

In my last post, I asked:
Are you saying that the typical modern cartridge crank will not fit my bike? Also that I need an asymetric cartridge and this will cost me more?

I would still like someone to answer this.

My LBS the other day looked at my Vitus 979 and said a rebuild made the most sense to them. They thought the BB was assymetrical. For them, the cartridge would be a special order and expensive.

What Andrew is geting at is thatthere were a number of variants of Shimano 600 through the years.

From your first post I think you might have what's know as N600 (New 600) cranks and bottom bracket. Prior to that 600 was known as 600EX.

Are your cups and your spindle in good to very good condition? If so then it'd be a whole lot easier just to replace the bottom bracket bearings.

Some Shimano Dura Ace and 600 bottom bracket spindles have a different taper than most other brands. that's the issue Andrew is referring to when he talks about tapers andthe Campagnolo bottom bracket.

Dura Ace and 600 are two different groupsets. Dura Ace is Shimano's top of the line road bike groupset and 600 (now called Ultegra) is tnext one to Dura Ace.

If it were me and the bottom bracket cups and cones were in good condition i'd just replace the bearings and adjust the bottom bracket for smooth running rather than try to find a cartridge bottom bracket that will work. YMMV

Cheers