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Derailleurs for 2300 & MTB cassette

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Derailleurs for 2300 & MTB cassette

Old 10-24-13, 12:45 PM
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PartsMan
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Derailleurs for 2300 & MTB cassette

I would like to swap in a 12-34 tooth cassette on my Reline Metro.
It has Shimano 2300 shifters with a 12-25 cassette and 52-42-30 triple crank.

The 2300 derailleur is only rated for 26t.
What inexpensive rear derailleur would work with 2300 shifters and a 34t?
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Old 10-24-13, 01:20 PM
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Use this to pick-
http://productinfo.shimano.com/specifications.html

You need 44T chain wrap capacity.
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Old 10-24-13, 01:31 PM
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You should treat yourself to a new chain to go with the new cassette; you will need a longer chain anyway, unless the current one is a lot longer than necessary..
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Old 10-24-13, 02:42 PM
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You never know - your new intended cassette may well work with the new cassette. I would try it and see. Even if it initially seems to work, going to a higher number of gears in the cassette may exceed the accuracy of the mechanism of a lower geared cassette. In other words, more gears in the cassette requires a more accurate movement of the guide wheels. I mention all this because my 8 speed cassette occasionally seems to lose it's place. I'm considering going to a 9 speed derailleur and chain.
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Old 10-24-13, 02:44 PM
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Cheap? Any of the Shimano "A" derailleurs should work: Altus Acera Alivio...

And yes, a new chain or 4-6 extra links spliced into your existing chain.
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Old 10-24-13, 03:29 PM
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Shimano only or can I use any other brands?
I am having a hard time finding a site that has a deal in stock that can do 34t cog and 44t capacity.
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Old 10-24-13, 03:44 PM
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Something like this should work:http://www.nashbar.com/bikes/Product...2#ReviewHeader
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Old 10-24-13, 03:56 PM
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If you promise Shimano and us that you won't use the 30/12, 30/14, 30/16... combos, then you won't need a full 44T capacity. Just make sure the chain is at least long enough to loop the biggest chainring and cog with an inch to spare. (This is a special case where the small-small chain sizing method shouldn't be used.)
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Old 10-25-13, 11:01 AM
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Originally Posted by ThermionicScott View Post
If you promise Shimano and us that you won't use the 30/12, 30/14, 30/16... combos, then you won't need a full 44T capacity. Just make sure the chain is at least long enough to loop the biggest chainring and cog with an inch to spare. (This is a special case where the small-small chain sizing method shouldn't be used.)
I would rather give up the big big combo.
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Old 10-25-13, 12:55 PM
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Originally Posted by PartsMan View Post
Shimano only or can I use any other brands?
I am having a hard time finding a site that has a deal in stock that can do 34t cog and 44t capacity.
Shimano (compatible) only -- SRAM and Campy derailleurs don't play nice with Shimano shifters unless you get some kind of inline Shiftmate or alt cable routing going on at the derailleur

Alivio der RD-M410, 34t cog, 43t cap max (will work with your 44t cap just fine).
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Old 10-30-13, 01:27 PM
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LBS talked me out of a "wide ratio" cassette.
So I ordered a 28-38-48 mtb crank set instead.

I figure if I still want more gear on bottom I can switch to a cassette
with a 28 or 30 tooth cog with the group I have.
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