Re: [CR]Could a 14 speed SOM be integrated with vintage lightweight freewheel clusters?

(Example: Production Builders:Frejus)

From: "ternst" <ternst1@cox.net>
To: "Don Wilson" <dcwilson3@yahoo.com>, "Classic Rendezvous" <classicrendezvous@bikelist.org>, "Sheldon Brown" <CaptBike@sheldonbrown.com>
References: <20050522183021.72086.qmail@web52510.mail.yahoo.com> <p06200700beb7ab9335cb@[10.0.1.34]>
Subject: Re: [CR]Could a 14 speed SOM be integrated with vintage lightweight freewheel clusters?
Date: Mon, 23 May 2005 09:22:40 -0700
reply-type=response

How about a quadruple front chainwheel set-up so it could be 840. Then you would maybe have only about 750 duplications and a room reserved with straight-jacket after trying to shift through the gears in sequence.
What fun!
Ted Ernst
Palos Verdes Estates,CA


----- Original Message -----
From: Sheldon Brown
To: Don Wilson


<classicrendezvous@bikelist.org> Sent: Monday, May 23, 2005 8:54 AM Subject: Re: [CR]Could a 14 speed SOM be integrated with vintage lightweight freewheel clusters?


> Don Wilson queried:
>
>>First, what is the correct formula for figuring the
>>total number of gear choices one would have with a 14
>>speed SOM with a 5 speed free wheel and a three ring
>>crank?
>
> Multiply. 14 X 5 X 3 = 210
>
> Not sure what you mean by "SOM" but I'm guessing you're speaking of the
> off-topic Rohloff Speedhub. See: http://harriscyclery.com/rohloff
>
>>Second, could one integrate an old free wheel cluster
>>and derailleur with a 14 speed SOM (I've seen old free
>>wheel clusters integrated with old Sturmey Archer
>>three speed hubs and a Huret Allvit derailleur in the
>>past)?
>
> I've put 3, 4, 5, 6 & 7 sprocket setups on Sturmey-Archer hubs.
>
> See: http://sheldonbrown.org/otb.html it won't work on the Rohloff
> because the axle is not long enough to clear the extra sprockets. The
> Rohloff axle is a very special part, not readily duplicated in a different
> length.
>>
>>Third (and flagrantly off list), could any of the
>>modern 10 speed clusters be integrated with the 14
>>speed SOM?
>
> No. Folks who seriously compete for the "most gears" title use a second
> multispeed hub as a jackshaft, usually mounted just below/behind the seat
> cluster.
>
> Don't forget the Schlumpf two-speed bottom bracket while you're at it!
>
> Sheldon "Nothing Exceeds Like Excess" Brown
> Newtonville, Massachusetts
> +----------------------------------------------------------------------+
> | To summarize: It is a well-known fact that those people who must |
> | want to rule people are, ipso facto, those least suited to do it. |
> | To summarize the summary: Anyone who is capable of getting |
> | themselves made President should on no account be |
> | allowed to do the job. |
> | To summarize the summary of the summary: |
> | People are a problem. -- Douglas Adams |
> +----------------------------------------------------------------------+
> --
> 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
> Useful articles about bicycles and cycling
> http://sheldonbrown.com