SRAM PC89 ?

drmcq-<< I recently replaced the chain on a 9s Shimano with a SRAM PC89 that was new in the box. I
measured the new chain with a Park Chain Stretch tool and to my surprise the reading was 0.5%.

Quoted message said:

Quoted message said:

<BR><BR>

The Park tool is 'pessimistic', IME, and measures new chains 'stretched'. Get a Rohloff chain
checker, better tool, IMO-

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

Qui si parla Campagnolo said:

drmcq-<< I recently replaced the chain on a 9s Shimano with a SRAM PC89 that was new in the box. I
measured the new chain with a Park Chain Stretch tool and to my surprise the reading was 0.5%.

Quoted message said:

Quoted message said:

<BR><BR>

Park does say that some "play" (up to 0.5) is normal in their instructions. This is even written on
the front of the tool.

Quoted message said:

The Park tool is 'pessimistic', IME, and measures new chains 'stretched'.

Not all chains - not Campagnolo C9 for example. The tool can barely fit in a new C9, let alone
indicate any stretch. Does this mean Campag chains last longer?

I'm also intrigued by the difference - although it is useful that a brand new SRAM (PC59 in my
experience) is less likely to skip on partly worn sprockets. ...Not sure that's such a good
thing really.

There is an issue over what exactly the Park tool measures. Does size of the rollers vary between
different chains?

~PB

I second that thought. I run PC89s and use the park tool with the same result as you. It's all good.
"Pete Biggs" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Qui si parla Campagnolo said:

drmcq-<< I recently replaced the chain on a 9s Shimano with a SRAM PC89 that was new in the box.
I measured the new chain with a Park Chain Stretch tool and to my surprise the reading was 0.5%.

Quoted message said:

><BR><BR>

Park does say that some "play" (up to 0.5) is normal in their instructions. This is even written
on the front of the tool.

Quoted message said:

The Park tool is 'pessimistic', IME, and measures new chains 'stretched'.

Not all chains - not Campagnolo C9 for example. The tool can barely fit in a new C9, let alone
indicate any stretch. Does this mean Campag chains last longer?

I'm also intrigued by the difference - although it is useful that a brand new SRAM (PC59 in my
experience) is less likely to skip on partly worn sprockets. ...Not sure that's such a good
thing really.

There is an issue over what exactly the Park tool measures. Does size of the rollers vary between
different chains?

~PB

I recently bought the same chain also for a 9 speed Shimano Ultegra double.

The SRAM chain does not work well with the front derailleur. The SRAM chain is significantly more
flexible than a Shimano chain. The shifting performance difference between the two chains is
incredible.

GlaucMan said:

I recently replaced the chain on a 9s Shimano with a SRAM PC89 that was new in the box. I measured
the new chain with a Park Chain Stretch tool and to my surprise the reading was 0.5%. This is my
first experience with SRAM chains and am curious why a_new_chain would measure this amount of
stretch.

Henry