A few more chainring questions

I have a few more questions about chainrings. Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. I'd like to
replace them with 52/38 rings. Can I do this without any problems?
Will I just have to adjust the front derailleur a little?



Thanks,
J. Spaceman

On Mar 13, 5:20*pm, Jason Spaceman
wrote:
I have a few more questions about chainrings. *Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? *Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. *I'd like to
replace them with 52/38 rings. *Can I do this without any problems?
Will I just have to adjust the front derailleur a little?

Thanks,
J. Spaceman

No compatibility issues, but unless they're worn out, I wouldn't
bother. With rings that large, you'll never notice a 1T difference.
That's a 1.8% drop on from 53-52, and 2.5% from 39-38. by
comparison, most rear shifts on a 10-speed cluster are 8-12%, and on
an old 5-speed freewheel are more in the neighborhood of 20%.

Hank Wirtz wrote:
On Mar 13, 5:20�pm, Jason Spaceman
wrote:
I have a few more questions about chainrings. �Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? �Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. �I'd like to
replace them with 52/38 rings. �Can I do this without any problems?
Will I just have to adjust the front derailleur a little?

Thanks,
J. Spaceman

No compatibility issues, but unless they're worn out,

for shimano, chain ramps are ever-so-slightly different on the 10-speed.
shimano 9-speed rings work best with shimano 9-speed chain.


I wouldn't
bother. With rings that large, you'll never notice a 1T difference.

on that we agree.


That's a 1.8% drop on from 53-52, and 2.5% from 39-38. by
comparison, most rear shifts on a 10-speed cluster are 8-12%, and on
an old 5-speed freewheel are more in the neighborhood of 20%.

On Fri, 13 Mar 2009 18:47:57 -0700, jim beam
wrote:

Hank Wirtz wrote:
On Mar 13, 5:20?pm, Jason Spaceman
wrote:
I have a few more questions about chainrings. ?Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? ?Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. ?I'd like to
replace them with 52/38 rings. ?Can I do this without any problems?
Will I just have to adjust the front derailleur a little?

Thanks,
J. Spaceman

No compatibility issues, but unless they're worn out,

for shimano, chain ramps are ever-so-slightly different on the 10-speed.
shimano 9-speed rings work best with shimano 9-speed chain.


I wouldn't
bother. With rings that large, you'll never notice a 1T difference.

on that we agree.


That's a 1.8% drop on from 53-52, and 2.5% from 39-38. by
comparison, most rear shifts on a 10-speed cluster are 8-12%, and on
an old 5-speed freewheel are more in the neighborhood of 20%.


The 53/39 rings currently on my bike are worn and in need of
replacing, so I thought I'd give them Specialites TA rings a try and
maybe get something slightly smaller like the a 52/38 combo.



J. Spaceman

In article ,
says...


I have a few more questions about chainrings. Can I use a 10-
speed
chainring on a 9-speed Ultegra drivetrain? Some of the rings I
looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. I'd like to
replace them with 52/38 rings. Can I do this without any problems?
Will I just have to adjust the front derailleur a little?



Thanks,
J. Spaceman
FWIW I just put a Shimanor FC-R700 compact crank on a 9 speed
system, using a SRAM 9-speed chaing. Inner 34 ring says 9/10
speed, outer 50 tooth says 10 speed. It works flawlessly with the
SRAM 9 speed chain. Other systems parts are DA7700 shifters,
DA7800 SS rear derailleur and 11-28 9-speed SRAM cassette. It ain't
pretty, but it works and has a nice wide range.

On Mar 13, 7:58*pm, Jason Spaceman
wrote:
On Fri, 13 Mar 2009 18:47:57 -0700, jim beam



wrote:
Hank Wirtz wrote:
On Mar 13, 5:20?pm, Jason Spaceman
wrote:
I have a few more questions about chainrings. ?Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? ?Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. ?I'd like to
replace them with 52/38 rings. ?Can I do this without any problems?
Will I just have to adjust the front derailleur a little?

Thanks,
J. Spaceman

No compatibility issues, but unless they're worn out,

for shimano, chain ramps are ever-so-slightly different on the 10-speed.
*shimano 9-speed rings work best with shimano 9-speed chain.

I wouldn't
bother. With rings that large, you'll never notice a 1T difference.

on that we agree.

That's a 1.8% drop on from 53-52, and 2.5% from 39-38. by
comparison, most rear shifts on a 10-speed cluster are 8-12%, and on
an old 5-speed freewheel are more in the neighborhood of 20%.

The 53/39 rings currently on my bike are worn and in need of
replacing, so I thought I'd give them Specialites TA rings a try and
maybe get something slightly smaller like the a 52/38 combo. *

J. Spaceman

They will work fine. We sell many TA rings, no problem with them.

Jason Spaceman wrote:
I have a few more questions about chainrings. Can I use a 10-speed
chainring on a 9-speed Ultegra drivetrain? Some of the rings I looked
at say "For 9/10 speed drivetrains", but I just want to make sure
there are no issues.

I'm currently running 53/39 rings on my road bike. I'd like to
replace them with 52/38 rings. Can I do this without any problems?
Will I just have to adjust the front derailleur a little?

They are the same part, perhaps with different graphic.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971