Re: [CR]69mm BB?

(Example: Production Builders:Cinelli:Laser)

Date: Thu, 21 Sep 2006 12:52:06 -0400 (GMT-04:00)
From: "Roman Stankus" <rstankus@mindspring.com>
To: Fred Rafael Rednor <fred_rednor@yahoo.com>, classicrendezvous@bikelist.org
Subject: Re: [CR]69mm BB?


Fred,

I think I did use a 68-SS which put the crank out to the right a bit (+1.5m m?). No quarrel with your approach at all!

Roman Stankus Atlanta, Georgia USA

-----Original Message-----

>From: Fred Rafael Rednor <fred_rednor@yahoo.com>

>Sent: Sep 21, 2006 12:32 PM

>To: classicrendezvous@bikelist.org

>Subject: Re: [CR]69mm BB?

>

>Roman,

> Understood. But Marcus seems to have a 69mm BB shell. In

>the past, my experience with that sort of situation was to use

>a 1mm spacer on the fixed cup side. Of course, it is still

>possible that a spindle meant for a 68mm BB will fit, if the

>lock ring isn't too thick.

> A different, recent CR list posting sent me to "the dungeon"

>to measure some Campagnolo - and a couple of Suntour Mighty -

>BB spindles. I actually found a couple of parts, marked 68-SS

>(or something like 68-MW in the case of Suntour) that were a

>bit wider between the bearing race shoulders than the other 68

>spindles. Perhaps _that_ is what you're supposed to use with

>this BB.

> Note that this is something other than the differences found

>between spindles meant for thick cup or thin cup bottom

>brackets. So please don't bring that into the discussion, it

>will just confuse things. Although it might be worth noting

>that some of the odd mixes of pieces that have worked well for

>people might be due to the accidental discovery of

>out-of-specification parts.

> Cheers,

> Fred "hors spécifications" Rednor - Arlington, Virginia (USA)

>

>--- Roman Stankus <rstankus@mindspring.com> wrote:

>

>> Fred and Marcus,

>>

>> A 70 may indeed be the proper way to go - but I have an early

>> 60's that I aquired on ebay in the past year that came to me

>> as a bare frame with a 68mm BB width. I assumed that over the

>> years, it had one or two too many facings but who knows. I

>> installed a 68 mm BB axle and all is fine with chainlines and

>> shifting and rides great. It's was repainted in the

>> early/mid 70's. I ride it with improper NR gear that goes

>> with the vintage of the repaint. I'm not sure I could stand

>> to restore it - then I'd have to track down all the old bits

>> - perhaps if I get a little more cumpulsive.......

>>

>> Roman Stankus

>> Atlanta, Georgia USA

>>

>>

>> -----Original Message-----

>> >From: Fred Rafael Rednor <fred_rednor@yahoo.com>

>> >Sent: Sep 21, 2006 11:01 AM

>> >To: marcus.e.helman@gm.com, classicrendezvous@bikelist.org

>> >Subject: Re: [CR]69mm BB?

>> >

>> >Marcus,

>> > Use a 70mm spindle. Assuming that this thing has Italian

>> >threading, that's what the make expected you to do anyway.

>> If

>> >it helps with th chainline, you might consider using a 1mm

>> >spacer between the fixed cup and the BB shell. In fact,

>> there

>> >seem to hae been a couple of BB shell manufacturers who

>> >expected you to use a fixed cup spacer. (Or some extremely

>> >zealous mechanics facing the shells...)

>> > Good luck,

>> > Fred Rednor - Arlington, Virginia (USA)

>> >

>> >--- marcus.e.helman@gm.com wrote:

>> >

>> >>

>> >> I just measured the BB of my '68ish Cinelli, and got 69mm,

>> >> right between

>> >> the standard widths of 68 and 70. There is a Japanese BB

>> in

>> >> there now. I

>> >> am thinking about replacing it. Should I use a spindle

>> for a

>> >> 68mm BB or a

>> >> 70mm BB? I care about Q factor, but I think that if I use

>> a

>> >> 68, I run the

>> >> risk that the adjustable cup will go too far into the BB

>> >> shell, and there

>> >> will be nothing for the lockring to grab onto. Italian

>> >> standard appears to

>> >> be 70mm too.

>> >>

>> >> Have I missed anything?

>> >>

>> >> Is there any difference between pre-CPSC Campagnolo and

>> >> post-CPSC

>> >> Campagnolo? If so, are the parts marked differently? I

>> have

>> >> looked at

>> >> some catalogs online, and I don't see any difference.

>> >>

>> >> Best regards,

>> >> Marcus Helman

>> >> Huntington Woods, Michigan

>> >> USA

>> >>

>> >>

>> >> _______________________________________________


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