shimano chainrings (roadbike)



P

Paul Jones

Guest
Hello all!

I've just recently upgraded my roadbike from a 16 speed (52,39 front,
12-21 rear) to an 18 speed Ultegra (53,39 front, 12-23 rear).

I'm finding that the 23 is useless (never ride on hills that steep), and
its a big jump between chainrings. A 44 tooth would be more practical
for the riding I am doing (might actually use the 23!), even if 44 does
not exist, a 42 would still be an improvement.

Does anyone know what size Ultegra chainrings come in? and if any
on-line bike shops have them. So many I have typed `chainring' into a
search and come up with nothing. Even the shimano website couldnt tell
me

Paul
 
M

Mike

Guest
Paul Jones wrote:
> Hello all!
>
> I've just recently upgraded my roadbike from a 16 speed (52,39 front,
> 12-21 rear) to an 18 speed Ultegra (53,39 front, 12-23 rear).
>
> I'm finding that the 23 is useless (never ride on hills that steep), and


So why did you bother "upgrading" ??
Maybe one day you will go uphill into a headwind with a flattish tyre,
broken pump, and heavy load, while ill and hungover and make use of that
extra gear.
By my calcs, the 39/21 gear will do 20km/hr max at a decent cadence.
Do you ever go slower than that?
 
P

Paul Jones

Guest
Why did I bother upgrading?

because my previous bike was 11 years old - steel frame, and had bent the
dropouts - was hardly worth fixing.

Maybe one day I will have that situation - except I hardly ever drink so will
never be hungover - never have been in my life.

As I said - my lowest gear is now a 23 - not 21. In the riding I am doing day
in, day out - by my caclulations (and I have done them) a 44 or 42 would be
more practical. I would also keep the 39, and use it whenever I know I will be
doing serious uphill riding.

Paul
(can anyone answer my orginal question????)

Mike wrote:

> Paul Jones wrote:
> > Hello all!
> >
> > I've just recently upgraded my roadbike from a 16 speed (52,39 front,
> > 12-21 rear) to an 18 speed Ultegra (53,39 front, 12-23 rear).
> >
> > I'm finding that the 23 is useless (never ride on hills that steep), and

>
> So why did you bother "upgrading" ??
> Maybe one day you will go uphill into a headwind with a flattish tyre,
> broken pump, and heavy load, while ill and hungover and make use of that
> extra gear.
> By my calcs, the 39/21 gear will do 20km/hr max at a decent cadence.
> Do you ever go slower than that?
 
J

John Stevenson

Guest
Paul Jones <[email protected]> wrote in news:3f7e6991
@news.comindico.com.au:

> Does anyone know what size Ultegra chainrings come in?


53, 52, 42 and 39 as far as I can tell from Shimano's catalogue. There's
also a 44 in Dura-Ace quality, but I bet it'll be hard to find and
expensive.
 
M

M2cycler

Guest
Paul Jones wrote:
> Hello all!
> I've just recently upgraded my roadbike from a 16 speed (52,39 front,
> 12-21 rear) to an 18 speed Ultegra (53,39 front, 12-23 rear).
> I'm finding that the 23 is useless (never ride on hills that steep), and
> its a big jump between chainrings. A 44 tooth would be more practical
> for the riding I am doing (might actually use the 23!), even if 44 does
> not exist, a 42 would still be an improvement.
> Does anyone know what size Ultegra chainrings come in? and if any
> on-line bike shops have them. So many I have typed `chainring'
> into a search and come up with nothing. Even the shimano website
> couldnt tell me
> Paul




yes, they come in 42. probably ur 23 wont be useless anymore.



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B

Bruce Dickson

Guest
Paul Jones <[email protected]> wrote in message news:<[email protected]>...
> Hello all!
>
> I've just recently upgraded my roadbike from a 16 speed (52,39 front,
> 12-21 rear) to an 18 speed Ultegra (53,39 front, 12-23 rear).
>
> I'm finding that the 23 is useless (never ride on hills that steep), and
> its a big jump between chainrings. A 44 tooth would be more practical
> for the riding I am doing (might actually use the 23!), even if 44 does
> not exist, a 42 would still be an improvement.
>
> Does anyone know what size Ultegra chainrings come in? and if any
> on-line bike shops have them. So many I have typed `chainring' into a
> search and come up with nothing. Even the shimano website couldnt tell
> me
>
> Paul


Hi Paul

A 42 chainring should be easy to find, a 44 would be a bit harder but
are definitely out there. Specialites TA and Stronglight and others
make Shimano compatible (130mm BCD) chainrings in a lot more sizes
than Shimano do. If your LBS can't help you out it would be very
simple to order one from an overseas online shop, none of the
Australian online shops that I have found seem to list much in the way
of parts, someone else might suggest one that does. If you order one
from overseas freight shouldn't be too much for one chainring and you
won't have to pay any duties or GST on a small order. BTW some sales
types might try to tell you you'll need to buy a new large chainring
to go with your new small chainring for better shifting but you
probably wouldn't notice the difference.

Bruce Dickson

Cycling-the sport of the century-mechanization which, together with
the
marvelous nature of man, triumphs over time and space
La Gazzetta dello Sport
 

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