Pitch

02-25-2004, 08:35 AM

Need new rings, how do you measure the pitch on a chainset?
Thanks

02-25-2004, 08:41 AM

On Wed, 25 Feb 2004 17:35:55 -0000, "Neil Smith" <[Only registered and activated users can see links. ].uk>
wrote:

>Need new rings, how do you measure the pitch on a chainset?
>Thanks
>

how old is the bike?

02-25-2004, 08:41 AM

On Wed, 25 Feb 2004 17:35:55 -0000, "Neil Smith" <[Only registered and activated users can see links. ].uk>
wrote:

>Need new rings, how do you measure the pitch on a chainset?
>Thanks
>

how old is the bike?

02-25-2004, 09:00 AM

Neil Smith wrote:

> Need new rings, how do you measure the pitch on a chainset?

Sheldon Brown has a conversion table. You measure distance between
adjacent bolts, the table gives you bolt circle diameter:

[Only registered and activated users can see links. ]
--
terry morse Palo Alto, CA [Only registered and activated users can see links. ]

02-25-2004, 09:00 AM

Neil Smith wrote:

> Need new rings, how do you measure the pitch on a chainset?

Sheldon Brown has a conversion table. You measure distance between
adjacent bolts, the table gives you bolt circle diameter:

[Only registered and activated users can see links. ]
--
terry morse Palo Alto, CA [Only registered and activated users can see links. ]

02-25-2004, 09:11 AM

On Wed, 25 Feb 2004 10:00:08 -0800, Terry Morse <[Only registered and activated users can see links. ]>
wrote:

>Neil Smith wrote:
>
>> Need new rings, how do you measure the pitch on a chainset?
>
>Sheldon Brown has a conversion table. You measure distance between
>adjacent bolts, the table gives you bolt circle diameter:
>
>[Only registered and activated users can see links. ]

ah! I thought he was talking about the pitch of the chain! Aren't
all chains (at least in the last, er, 40 years?) the same pitch
(length of links)?

02-25-2004, 09:11 AM

On Wed, 25 Feb 2004 10:00:08 -0800, Terry Morse <[Only registered and activated users can see links. ]>
wrote:

>Neil Smith wrote:
>
>> Need new rings, how do you measure the pitch on a chainset?
>
>Sheldon Brown has a conversion table. You measure distance between
>adjacent bolts, the table gives you bolt circle diameter:
>
>[Only registered and activated users can see links. ]

ah! I thought he was talking about the pitch of the chain! Aren't
all chains (at least in the last, er, 40 years?) the same pitch
(length of links)?

02-25-2004, 09:32 AM

thanks
"Terry Morse" <[Only registered and activated users can see links. ]> wrote in message
news:[Only registered and activated users can see links. ]...
> Neil Smith wrote:
>
> > Need new rings, how do you measure the pitch on a chainset?
>
> Sheldon Brown has a conversion table. You measure distance between
> adjacent bolts, the table gives you bolt circle diameter:
>
> [Only registered and activated users can see links. ]
> --
> terry morse Palo Alto, CA [Only registered and activated users can see links. ]

02-25-2004, 09:32 AM

thanks
"Terry Morse" <[Only registered and activated users can see links. ]> wrote in message
news:[Only registered and activated users can see links. ]...
> Neil Smith wrote:
>
> > Need new rings, how do you measure the pitch on a chainset?
>
> Sheldon Brown has a conversion table. You measure distance between
> adjacent bolts, the table gives you bolt circle diameter:
>
> [Only registered and activated users can see links. ]
> --
> terry morse Palo Alto, CA [Only registered and activated users can see links. ]

02-25-2004, 04:50 PM

"Neil Smith" <[Only registered and activated users can see links. ].uk> wrote:

> Need new rings, how do you measure the pitch on a chainset?

Chain pitch is simply the distance between adjacent pins in the chain.
All modern bikes use 1/2" pitch; a few antiques use special 1" pitch
chain that is not interchangeable with 1" pitch industrial chain.

Any rings that you can buy off the shelf will be 1/2" pitch. They are
distinguished only by their tooth width, with single-speed equipment
traditionally using 1/8" width and derailleur bikes using 3/32" width.
Industrial 1/2" pitch chain is designed for 1/4" wide teeth.

Chalo Colina