J
James Thomson
Guest
"!Jones" <[email protected]> wrote:
> When you're talking about a bolt hole pattern on a chain
> ring, you specify the radius and # of teeth, correct?
Normally the bolt circle _diameter_ and number of teeth.
> The tandem timing ring has 32 teeth. The 5 holes measure about
> 29mm on center. Solving for the radius of the bolt hole circle, I get
> 24.67mm; however, I see nothing like that in any of the catalogs.
> Am I on the right sheet of music here?
Is it a TA Cyclotourist (Pro 5 vis), Stronglight 49D, or one of many older
cranks that used a 50mm primary bolt circle? If so, TA rings are still
available. In the USA, try Peter White Cycles or Harris Cyclery (Google
will find you their web sites).
James Thomson
> When you're talking about a bolt hole pattern on a chain
> ring, you specify the radius and # of teeth, correct?
Normally the bolt circle _diameter_ and number of teeth.
> The tandem timing ring has 32 teeth. The 5 holes measure about
> 29mm on center. Solving for the radius of the bolt hole circle, I get
> 24.67mm; however, I see nothing like that in any of the catalogs.
> Am I on the right sheet of music here?
Is it a TA Cyclotourist (Pro 5 vis), Stronglight 49D, or one of many older
cranks that used a 50mm primary bolt circle? If so, TA rings are still
available. In the USA, try Peter White Cycles or Harris Cyclery (Google
will find you their web sites).
James Thomson