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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 03-26-11, 01:28 PM   #1
carmie
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? regarding cluster/cassette size

Hi, all:

We're getting ready to replace the cassette on our DaVinci global venture.

Our existing one is a SRAM PG980 11t.

Amazon and other online cycling stores offer two sizes.

What is the difference between an 11-34 and an 11-32?

What do these numbers refer to?

Thanks for your help!
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Old 03-26-11, 02:08 PM   #2
rdtompki
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Count the teeth on the largest cog of your current cassette. If it has 32 teeth and you sometimes find yourselves wanting a lower gear, go ahead and buy an11-34. If your happy with your current gearing, then buy the same cassette, 11-32 or 11-34. If you never use the largest cog, whether 34t or 32t you might consider a cassette with closer spacing. We use and 11-32 and there are times I'd like the 34t cog it things get really steep, but the spacing on the 11-32 works better for us. I think it's all about the type of riding you do and how strong a team you are. If you are replacing your cassette you should put on a new chain as well unless your chain is very low mileage.
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Old 03-26-11, 04:37 PM   #3
carmie
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Thanks, rdtompki, I thought you might reply!
And thanks for the 11-32/11-34 explanation.
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Old 03-26-11, 05:52 PM   #4
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Just be aware that you may (or may not, it depends) need to increase the length of your chain if you increase the size of your largest cog.
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Old 03-28-11, 07:34 AM   #5
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these are the spockets you get at least for shimano m760 9-speed (SRAM is probably similar). For a long time we rode the 32, but now prefer the 34 - often you can stay out of granny, but you do lose some medium gears
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