Suntour Chainring

[Phenian]

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

Cheers

[Simon Daw]

"phenian" <ph3n1an-conevert-numbers@iclway.co.uk> wrote in message
news:c4kd77$44a$1@newsg4.svr.pol.co.uk...
> 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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[Visionset]

"Simon Daw" <simondaw@NOSPAMmsn.com> wrote in message
news:c4m2jk$o5s$1@news8.svr.pol.co.uk...
> "phenian" <ph3n1an-conevert-numbers@iclway.co.uk> wrote in
> message news:c4kd77$44a$1@newsg4.svr.pol.co.uk...
> > 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.
>

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]

"VisionSet" <spam@ntlworld.com> wrote in message
news:yhzbc.1725$%K1.1684@newsfe2-gui.server.ntli.net...
>
> "Simon Daw" <simondaw@NOSPAMmsn.com> wrote in message
> news:c4m2jk$o5s$1@news8.svr.pol.co.uk...
> > "phenian" <ph3n1an-conevert-numbers@iclway.co.uk> wrote
> > in message news:c4kd77$44a$1@newsg4.svr.pol.co.uk...
> > > 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.
> >
>
> 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