Was there ever a 44t Biopace OUTER ring?

[Bruce Lange]

I want to set up a 44/36 Shimano Biopace (original, not BiopaceII) 110 BCD
double crank.

I have a few 44t Biopace chainrings around, but they're all intended as
middle/inner rings.

Did Shimano ever make a 44t Biopace chainring intended as a big ring?
Anybody have one?

Thanks in advance,

-Bruce-

 

[JeffWills]

Bruce Lange wrote:
> I want to set up a 44/36 Shimano Biopace (original, not BiopaceII) 110 BCD
> double crank.
>
> I have a few 44t Biopace chainrings around, but they're all intended as
> middle/inner rings.
>
> Did Shimano ever make a 44t Biopace chainring intended as a big ring?
> Anybody have one?
>

I don't think so. IIRC, Biopace and Biopace II outer rings only came in
46 and 48 teeth. If you want "close", you could try a 46/38
combination.

Jeff

 

[[email protected]]

On 18 Aug 2005 20:19:28 -0700, "JeffWills" <[email protected]>
wrote:

>
---------------- clip
>I don't think so. IIRC, Biopace and Biopace II outer rings only came in
>46 and 48 teeth. If you want "close", you could try a 46/38
>combination.
>
>Jeff
----------------

Nonsense. I have two Shimano Biopaqce 53T outers

Rollen

 

[Booker C. Bense]

-----BEGIN PGP SIGNED MESSAGE-----

In article <[email protected]>,
<[email protected]> wrote:
>On 18 Aug 2005 20:19:28 -0700, "JeffWills" <[email protected]>
>wrote:
>
>>
>---------------- clip
>>I don't think so. IIRC, Biopace and Biopace II outer rings only came in
>>46 and 48 teeth. If you want "close", you could try a 46/38
>>combination.
>>
>>Jeff
>----------------
>
>Nonsense. I have two Shimano Biopaqce 53T outers
>

_ With 110 spacing?

_ Booker C. Bense


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[Sheldon Brown]

Bruce Lange wrote:

> I want to set up a 44/36 Shimano Biopace (original, not BiopaceII) 110 BCD
> double crank.
>
> I have a few 44t Biopace chainrings around, but they're all intended as
> middle/inner rings.
>
> Did Shimano ever make a 44t Biopace chainring intended as a big ring?

No. In the 110 Bolt Circle Diameter they did 46, 48 (most common) and
50 (quite rare.)

I would expect you could _use_ a 44 as an outer with no problem though.

Keep it facing the normal direction. The counterbores in the mounting
holes will then be on the wrong side, but that's no biggie.

Sheldon "http://sheldonbrown.com/biopace" Brown
+-------------------------------------------------------------+
| I have never let my schooling interfere with my education. |
| --Mark Twain |
+-------------------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

 

[[email protected]]

On Mon, 22 Aug 2005 17:49:41 +0000 (UTC), Booker C. Bense
<[email protected]> wrote:

>-----BEGIN PGP SIGNED MESSAGE-----
>
>In article <[email protected]>,
> <[email protected]> wrote:
>>On 18 Aug 2005 20:19:28 -0700, "JeffWills" <[email protected]>
>>wrote:
>>
>>>
>>---------------- clip
>>>I don't think so. IIRC, Biopace and Biopace II outer rings only came in
>>>46 and 48 teeth. If you want "close", you could try a 46/38
>>>combination.
>>>
>>>Jeff
>>----------------
>>
>>Nonsense. I have two Shimano Biopaqce 53T outers
>>
>
>_ With 110 spacing?
>
>_ Booker C. Bense

- - - - - - - - -

Nope, 130.

Rollen

 

[JeffWills]

[email protected] wrote:
> >>On 18 Aug 2005 20:19:28 -0700, "JeffWills" <[email protected]>
> >>wrote:
> >>
> >>>
> >>---------------- clip
> >>>I don't think so. IIRC, Biopace and Biopace II outer rings only came in
> >>>46 and 48 teeth. If you want "close", you could try a 46/38
> >>>combination.
> >>>
> >>>Jeff
> >>----------------
> >>
> >>Nonsense. I have two Shimano Biopaqce 53T outers
> >>
> >
> >_ With 110 spacing?
> >
> >_ Booker C. Bense
>
> - - - - - - - - -
>
> Nope, 130.
>
> Rollen

See, if you'd read Bruce's original post, you'd have know that he
wanted 110 bolt circle, which meant that 53 tooth Biopace rings weren't
relevant.

I can understand (sort of) why you'd want to find a 44 tooth outer
ring- but putting a "middle" on the outside isn't a big deal. I've done
it with round rings and it works fine. *Finding* a 44 tooth Biopace
ring may be more difficult. Perhaps Sheldon has one- they're not listed
on the Harris Cyclery web page (probably with good reason).

A much more expensive alternative is a custom chainring from Highpath
Engineering: http://www.highpath.co.uk/cycles/products/eggs/01.html

Jeff