Re: [CR]Campag NR vs. SR Ball Bearing Quantity Differences ?

(Example: Production Builders:Frejus)

Date: Thu, 15 Jun 2006 08:36:37 -0400
From: "Tim Fricker" <tymncycle@gmail.com>
To: "r cielec" <teaat4p@yahoo.com>
Subject: Re: [CR]Campag NR vs. SR Ball Bearing Quantity Differences ?
In-Reply-To: <20060615052439.46847.qmail@web52009.mail.yahoo.com>
References: <20060615052439.46847.qmail@web52009.mail.yahoo.com>
cc: classicrendezvous@bikelist.org

I'm no expert, but as I recall, the other difference between SR and NR bbs and pedals was the titanium spindles in both. I'm guessing the diameter and cone profile of the titanium spindles is different from the steel, and thus the change in bearing size. I think you'd have to change spindles along with the bearings. But someone who has spent a lot more time studying this stuff would know better.

Tim

On 6/15/06, r cielec <teaat4p@yahoo.com> wrote:
> Ahoy !
>
> Why are the quantities of ball bearings different for some components NR vs. SR?
>
> Can the "SR" ball bearings @ size & quantity be installed in the NR ?
> Example: In the NR bottom bracket, remove qty. twenty-two 1/4 inch. balls and install quantity twenty-eight 3/16 inch balls.
>
> BOTTOM BRACKET
> SR .... (28 total @14+14) 3/16"
> NR - GS .... (22 total @ 11+11) 1/4"
>
> PEDALS
> SR .... 1/8" (64 total per pair)
> NR .... 5/32" (48 total per pair)
>
> Richard Cielec
> Chicago, Illinois
>
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--
Tim Fricker
bikes@vienna, llc
Vienna, VA, USA
Recumbents, folders, tandems, commuters, etc.