help identify chain rings please

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano) on
rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a smooth
ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is Dawes Comp.
Giro 200 3-4 years old. Any help or advice welcomed. Thanks.

Do you mean 13-14 years old, not 3-4? If the exage equipment is original, that bike is more than 10
years old. Sounds like all Exage equipment, but not sure of the bolt pattern for the chainrings.
Just bring them in to your local shop, they'll quite possibly have something in stock that fits.
Since it's downtube shifting, you don't need really fancy chainrings up front, so they shouldn't be
too expensive. Aftermarket versions will do just fine.

--Mike-- Chain Reaction Bicycles chainreaction.comchainreaction.comOpen ↗

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

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano) on
rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a smooth
ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is Dawes Comp.
Giro 200 3-4 years old. Any help or advice welcomed.

Please write back with the Shimano crank part number. It's stamped on the inside of the right arm
and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously thorough with this nice
thoughtful feature.

--
Andrew Muzi yellowjersey.orgyellowjersey.orgOpen ↗ Open every day since 1 April 1971

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

Quoted message said:

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

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano) on
rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a
smooth ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is Dawes
Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Please write back with the Shimano crank part number. It's stamped on the inside of the right arm
and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously thorough with this nice
thoughtful feature.

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes dealer.

Quoted message said:

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes

dealer.

Very interesting. Exage hasn't been around for years (unless it's something they sell in the UK and
not in the US?). How many cogs in the rear?

--Mike-- Chain Reaction Bicycles chainreactionbicycles.comchainreactionbicycles.comOpen ↗

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

Quoted message said:

"A Muzi" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

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

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano)
on rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a
smooth ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is
Dawes Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Please write back with the Shimano crank part number. It's stamped on

the

Quoted message said:

Quoted message said:

inside of the right arm and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously
thorough with this nice thoughtful feature.

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes

dealer.

I don't think it makes much diference. To find a replacement, you can measure the bolt hole
diameter, the number of holes, number of teeth, and the position if sits in the crankset. Any good
bike shop can get a replacement. Or just take it to the LBS, they probably have it in stock.

Wynn

[email hidden] (Michael Green) wrote in message
news:<[email hidden]>...

Quoted message said:

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

Quoted message said:

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

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano)
on rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a
smooth ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is
Dawes Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Please write back with the Shimano crank part number. It's stamped on the inside of the right
arm and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously thorough with this
nice thoughtful feature.

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes dealer.

Michael Green said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano) on
rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a smooth
ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is Dawes Comp.
Giro 200 3-4 years old.

If I wanted to replace rings on that, I would wok out the BCD* then try Stronglight rings
or similar.
* See: sheldonbrown.comgloss bo z.htmlOpen ↗

According to the catalogue, the 1999 Dawes Giro 200 has a "Shimano TY30A Megarange 28-38-48 170mm
crankset with guard" (and Exage brakes).

As replacement rings are never cheap (when you have to buy all three), and it's a naff looking
crankset anyway, what about replacing the whole thing? The crankset, I mean, not the bike!

Have a browse through: settlecycles.co.ukshopOpen ↗ (best UK place for most chainrings, btw)
and sjscycles.comvIndex.htmOpen ↗

Would need to make sure it's compatible with the (Shimano) bottom bracket.

~PB

Quoted message said:

Quoted message said:

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

Quoted message said:

My chainrings are knackered. But what are they? Shimano, triple, no name (other than Shimano)
on rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual feature is a
smooth ring outside the large ring to prevent your leg coverings getting 'bitten'. Bike is
Dawes Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Quoted message said:

"A Muzi" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

Please write back with the Shimano crank part number. It's stamped on

the

Quoted message said:

Quoted message said:

inside of the right arm and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously
thorough with this nice thoughtful feature.

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

Quoted message said:

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes

dealer.

That makes it easy!

The Tourney crank you have is rivetted together and so none of the chainrings can be removed or
changed. When you say"knackered" are you referring to the several teeth which are truncated and the
slots and folds just beneath the teeth which look like a metal eating monster has chewed it? That's
not a problem, it's a feature! Those things assist shifting. Stop at an LBS and peek at a similarly
priced new bicycle's chainrings before you pursue this any further.

We get telephone calls from week-old bicycle customers in a panic over those slots and folds.

--
Andrew Muzi yellowjersey.orgyellowjersey.orgOpen ↗ Open every day since 1 April 1971

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

Quoted message said:

Quoted message said:

Quoted message said:

"Michael Green" <[email hidden]> wrote in message
"]news:[email hidden]...
> My chainrings are knackered. But what are they? Shimano, triple, no name (other than
> Shimano) on rings. Bike has Exage brakes, downtube levers are marked SIS. The only unusual
> feature is a smooth ring outside the large ring to prevent your leg coverings getting
> 'bitten'. Bike is Dawes Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Quoted message said:

"A Muzi" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

Please write back with the Shimano crank part number. It's stamped on

the

Quoted message said:

Quoted message said:

inside of the right arm and begins with FC, such as FC-M480 or FC-MC20. Shimano is rigorously
thorough with this nice thoughtful feature.

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

Quoted message said:

It looks like FG TY30. And yes 3-4 years old. Bought new by me from Dawes

dealer.

That makes it easy!

The Tourney crank you have is rivetted together and so none of the chainrings can be removed or
changed. When you say"knackered" are you referring to the several teeth which are truncated and
the slots and folds just beneath the teeth which look like a metal eating monster has chewed it?
That's not a problem, it's a feature! Those things assist shifting. Stop at an LBS and peek at a
similarly priced new bicycle's chainrings before you pursue this any further.

We get telephone calls from week-old bicycle customers in a panic over those slots and folds.

They are knackered, the pressure side of the teeth are very rounded, particularly on the
granny ring.

Rivetted eh? And here was me thinking the bolts were just diguised by the crud. Advice on
replacement please! Thanks.

Michael Green said:

They are knackered, the pressure side of the teeth are very rounded, particularly on the
granny ring.

Worn chainring teeth usually look pointy or shark-like, not rounded.

Does the chain skip?

~PB

Quoted message said:

They are knackered, the pressure side of the teeth are very rounded, particularly on the
granny ring.

Just to make sure, check out the chainring photos on this page-

chainreaction.comchainrings.htmOpen ↗

We get so many customers thinking their chainrings are defective on new bikes, we finally put up
some photos showing what new chainrings actually look like. But since your bike is 3-4 years old,
well, it would be unusual for them to be worn, but not impossible. In general, if you replace your
chain when needed, chainrings will typically deliver between 8-15,000 miles of life before having to
be replaced (higher quality chainrings may last longer, especially with proper drivetrain
maintenance).

As others have pointed out, your chainrings are riveted together, so you need to replace the entire
assembly on that side. They're not all that expensive (typically less than the cost of three
chainrings), but it's also an opportunity to upgrade to something different (with removable
chainrings). Sometimes shops will have something decent & cheap that came off a new bike where a
customer wanted something different. Just make sure you get an appropriate crank length.

--Mike-- Chain Reaction Bicycles chainreactionbicycles.comchainreactionbicycles.comOpen ↗

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

Quoted message said:

Michael Green said:

They are knackered, the pressure side of the teeth are very rounded, particularly on the
granny ring.

Worn chainring teeth usually look pointy or shark-like, not rounded.

Does the chain skip?

~PB

Bad choice of words, the teeth do indeed look sharp and sharklike, and yes chain skips under
pressure on the small.

Quoted message said:

Quoted message said:

Quoted message said:

> "Michael Green" <[email hidden]> wrote in message
> "]news:[email hidden]...
> > My chainrings are knackered. But what are they? Shimano, triple,

no

Quoted message said:

Quoted message said:

Quoted message said:

> > name (other than Shimano) on rings. Bike has Exage brakes,

downtube

Quoted message said:

Quoted message said:

Quoted message said:

> > levers are marked SIS. The only unusual feature is a smooth ring outside the large ring to
> > prevent your leg coverings getting

'bitten'.

Quoted message said:

Quoted message said:

Quoted message said:

> > Bike is Dawes Comp. Giro 200 3-4 years old. Any help or advice welcomed.

Quoted message said:

Quoted message said:

Quoted message said:

"A Muzi" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

> Please write back with the Shimano crank part number. It's stamped

on

Quoted message said:

Quoted message said:

the

Quoted message said:

> inside of the right arm and begins with FC, such as FC-M480 or

FC-MC20.

Quoted message said:

Quoted message said:

Quoted message said:

> Shimano is rigorously thorough with this nice thoughtful feature.

Quoted message said:

Quoted message said:

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

Quoted message said:

It looks like FG TY30. And yes 3-4 years old. Bought new by me from

Dawes

Quoted message said:

Quoted message said:

dealer.

Quoted message said:

"A Muzi" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

That makes it easy!

Quoted message said:

Quoted message said:

The Tourney crank you have is rivetted together and so none of the chainrings can be removed or
changed. When you say"knackered" are you referring to the several teeth which are truncated and
the slots and

folds

Quoted message said:

Quoted message said:

just beneath the teeth which look like a metal eating monster has chewed

it?

Quoted message said:

Quoted message said:

That's not a problem, it's a feature! Those things assist shifting.

Stop

Quoted message said:

Quoted message said:

at an LBS and peek at a similarly priced new bicycle's chainrings before

you

Quoted message said:

Quoted message said:

pursue this any further.

We get telephone calls from week-old bicycle customers in a panic over

those

Quoted message said:

Quoted message said:

slots and folds.

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

Quoted message said:

They are knackered, the pressure side of the teeth are very rounded, particularly on the
granny ring.

Rivetted eh? And here was me thinking the bolts were just diguised by the crud. Advice on
replacement please! Thanks.

In that case you'll need to buy a complete crank, often the same price for a right side as for the
whole complete set. Here, that type of unit is $35~$40 complete - less than buying chainrings!

If you intend to keep the bicycle a long while, if there are no impending major repairs and if you
think you'll want custom gearing now or in the future, you might look at a more expensive crank that
allows individual ring substitution. It's likely you'll have to change to a shorter crank bearing
spindle ( "bottom bracket" assembly) so the entire operation will be quite a bit more at minimum.

If you have no other complaints than the "knackered" ( quite a colorful word!) damage, just get the
current model of your Tourney crank. Any LBS should have it and expect a five minute installation.

--
Andrew Muzi yellowjersey.orgyellowjersey.orgOpen ↗ Open every day since 1 April 1971