Suntour Chainring

"phenian" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I have a slightly worn Suntour 52T outer chainring. Will I
be able to swap it for a similar Shimano one?

Cheers

Should be possible, but depends *how* similar it is - some
more information would be helpful! Suntour have made a lot
of products over the years...

Measure the pitch circle diameter (PCD). This is the
diameter of the circle formed by the chainring fixing bolts
about the centre of the bottom bracket axle. It's not
particularly easy to measure accurately with the chainring
attached to the crank, but it is possible. In practice, you
have to measure the radius and double it. You'll need an
accurate measurement for anyone to be absolutely sure that
they're giving you thr right information, although Suntour
always tended to use pretty standard designs.

Simon

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"Simon Daw" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"phenian" <[email hidden]> wrote in
message "]news:[email hidden]...

Quoted message said:

I have a slightly worn Suntour 52T outer chainring. Will
I be able to

swap

Quoted message said:

Quoted message said:

it for a similar Shimano one?

Cheers

Should be possible, but depends *how* similar it is -
some more

information

Quoted message said:

would be helpful! Suntour have made a lot of products over
the years...

Measure the pitch circle diameter (PCD). This is the
diameter of the

circle

Quoted message said:

formed by the chainring fixing bolts about the centre of
the bottom

bracket

Quoted message said:

axle. It's not particularly easy to measure accurately
with the chainring attached to the crank, but it is
possible. In practice, you have to

measure

Quoted message said:

the radius and double it. You'll need an accurate
measurement for anyone

to

Quoted message said:

be absolutely sure that they're giving you thr right
information, although Suntour always tended to use pretty
standard designs.

If it is 5 bolt fixing then it is easier to mesure between
the centres of two adjacent bolts and the PCD = dist * 0.851
--
Mike W

"VisionSet" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Simon Daw" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"phenian" <[email hidden]> wrote
in message "]news:[email hidden]...

Quoted message said:

I have a slightly worn Suntour 52T outer chainring.
Will I be able to

swap

Quoted message said:

Quoted message said:

it for a similar Shimano one?

Cheers

Should be possible, but depends *how* similar it is -
some more

information

Quoted message said:

would be helpful! Suntour have made a lot of products
over the years...

Measure the pitch circle diameter (PCD). This is the
diameter of the

circle

Quoted message said:

formed by the chainring fixing bolts about the centre of
the bottom

bracket

Quoted message said:

axle. It's not particularly easy to measure accurately
with the

chainring

Quoted message said:

Quoted message said:

attached to the crank, but it is possible. In practice,
you have to

measure

Quoted message said:

the radius and double it. You'll need an accurate
measurement for anyone

to

Quoted message said:

be absolutely sure that they're giving you thr right
information,

although

Quoted message said:

Quoted message said:

Suntour always tended to use pretty standard designs.

If it is 5 bolt fixing then it is easier to mesure
between the centres of two adjacent bolts and the PCD =
dist * 0.851

Sorry that's the radius, make that PCD = dist * 1.701

--
Mike W