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Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

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Old 05-13-10, 01:30 PM   #1
ClarkinHawaii 
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Sell your unloved IRD 11-34 cassette

Yeah, it could shift better, but I'm stuck with 10-speed and need the low gear. Make me a deal!

Powers that be: please don't move this to the "for sale" section since this is a rare, almost tandem-specific item.
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Old 05-13-10, 02:13 PM   #2
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Actually, you can get one from Harris Cyclery with a credit card. http://sheldonbrown.com/harris/k7.html#10

The good part is that 10 speed SLX is supposedly only a few weeks away. That's good news for all of us weak kneed folks. http://www.bikeradar.com/news/articl...-in-2010-25297
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Old 05-13-10, 02:32 PM   #3
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Try Gold Country http://www.tandems-recumbents.com/
Rick said that he had a box full of them and he might make you a deal.
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Old 05-13-10, 04:21 PM   #4
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Originally Posted by Monoborracho View Post
Actually, you can get one from Harris Cyclery with a credit card. http://sheldonbrown.com/harris/k7.html#10

I love Sheldon, but Harris Cyclery is for customers in a different income bracket from me.

The good part is that 10 speed SLX is supposedly only a few weeks away. That's good news for all of us weak kneed folks. http://www.bikeradar.com/news/articl...-in-2010-25297
From the article you linked: "However, Shimano say the new parts which will be available from June 2010 won't be compatible with their nine-speed mountain bike components or 10-speed road components."

Am I missing something?

Edit: Now you've got me thinking--I wonder if a lot of people will be upgrading their entire systems after the new SLX and XT 10-speed stuff comes out. Perhaps there are readers of this forum who will be upgrading and will be willing to sell me their IRD for cheap? Is it too early for "presales"?

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Old 05-13-10, 04:34 PM   #5
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Try Gold Country http://www.tandems-recumbents.com/
Rick said that he had a box full of them and he might make you a deal.
I just sent Rick an email. Thanks for the tip!

Incidentally, the lowest new price I've been able to find is $133 shipped.

I'm hoping for a gently used one

Or if I wait til later in the year, the price of the new ones will probably come down, right?

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Old 05-14-10, 01:36 AM   #6
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I'm holding on to mine and it's nowhere near gently used anymore. The cassette worked better for me with DA shifters than it did with Ultegra. It was unacceptable, in my opinion, with the Ultegra, however it shifts reliably enough for me with the DA. It's not perfect but it runs quieter than a stoker complaining about the lack of low enough gears struggling up the last mile of the Tollhouse grade.
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Old 05-17-10, 10:00 AM   #7
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Quote:
Originally Posted by ClarkinHawaii View Post
From the article you linked: "However, Shimano say the new parts – which will be available from June 2010 – won't be compatible with their nine-speed mountain bike components or 10-speed road components."

Am I missing something?
I'm hoping that the comment about the new 10-speed MTB stuff not being compatible with 9-speed MTB stuff means that if you change to a 10-speed cassette, you'll need a new chain, new rear shifter, new front derailleur (because the chain is slightly narrower), and Shimano want you to get new chainrings (although that probably won't be necessary).

The comment about the new 10-speed MTB stuff not being compatible with 10-speed road stuff hopefully ONLY means that a road rear derailleur won't work with the MTB cassette (just like was the case for 9-speed stuff), but everything should be OK if you use a MTB rear derailleur.

The only way that this wouldn't work is if Shimano made the cog spacing or chain width different for their mountain and road components, which I doubt they will. I also assume that the new rear derailleurs use the same geometry and so require the same cable pull as the old ones; since Shimano hasn't changed this for a long time, I don't expect that this to be the case, and even if it is then you would still be able to use one of the older ("9-speed") MTB Shimano rear derailleurs without a problem with the new cassettes.

So, in summary, the incompatibility that Shimano states makes complete sense without making it difficult to use these new 10-speed cassettes with an otherwise road setup (except for MTB RD).

Last edited by Chris_W; 05-17-10 at 10:04 AM.
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Old 05-17-10, 06:27 PM   #8
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Originally Posted by Chris_W View Post
I'm hoping that the comment about the new 10-speed MTB stuff not being compatible with 9-speed MTB stuff means that if you change to a 10-speed cassette, you'll need a new chain, new rear shifter, new front derailleur (because the chain is slightly narrower), and Shimano want you to get new chainrings (although that probably won't be necessary).

The comment about the new 10-speed MTB stuff not being compatible with 10-speed road stuff hopefully ONLY means that a road rear derailleur won't work with the MTB cassette (just like was the case for 9-speed stuff), but everything should be OK if you use a MTB rear derailleur.

The only way that this wouldn't work is if Shimano made the cog spacing or chain width different for their mountain and road components, which I doubt they will. I also assume that the new rear derailleurs use the same geometry and so require the same cable pull as the old ones; since Shimano hasn't changed this for a long time, I don't expect that this to be the case, and even if it is then you would still be able to use one of the older ("9-speed") MTB Shimano rear derailleurs without a problem with the new cassettes.

So, in summary, the incompatibility that Shimano states makes complete sense without making it difficult to use these new 10-speed cassettes with an otherwise road setup (except for MTB RD).
WOW--Great analysis--Hope you're right as I'd much rather spend $50 than $133!
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Old 05-21-10, 10:26 PM   #9
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I also assume that the new rear derailleurs use the same geometry and so require the same cable pull as the old ones; since Shimano hasn't changed this for a long time, I don't expect that this to be the case, and even if it is then you would still be able to use one of the older ("9-speed") MTB Shimano rear derailleurs without a problem with the new cassettes.
It sounds like the shifter cable pull ratio is changing. "The redesigned Shadow rear derailleur uses a new LongArm architecture to both reduce cable tension and add leverage to the system, ultimately delivering a linear, light-action feel at the shifter." The pictures seem to back this up with a much longer lever on the rear derailleur.

That would explain the statement that 10 speed road is incompatible, since the road shifters will no longer with withthe mountain RDs.

Odd since SRAM is moving everything to the same cable pull -- their 10 speed X.n groups now use the same pull as double-tap.

But i'd be surprised if the actual cog spacing at the cassette is different.
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