The cups are different too.
Steven Willis
The Bike Stand
1778 East Second Street
Scotch Plains NJ 07076
908-322-3330
http://www.thebikestand.com
> 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.